The stick is then able to detect human chorionic gonadotropin (hCG), which is a hormone produced during early pregnancy. Diuretics, medications that reduce the amount of fluid in the body, can sometimes cause a false positive pregnancy result on a urine test, according to the Mayo Clinic. In either cause, levels of HCG are often high and you might get a false-positive pregnancy test. Ad Choices. Test for pregnancy before this timeframe and your levels might still not be back at your pre-pregnancy range, which means you could potentially notice a positive test, which would likely be a false positive. 2. These include: molar pregnancy; rare antibodies; hydroxychloroquine (HCQ) injections; chemotherapy But on a drug screen, it can make you seem to have used marijuana. Which of the Pregnancy Food Rules Are Worth Paying Attention To? Some medications may create a false positive pregnancy test result as well. Policy. Typically, it takes about 10 days for the synthetic hCG in these trigger shots to clear from your blood and urine. 2023. Some medications may create a false positive pregnancy test result as well. If youre taking any medications to help you get pregnant, experts suggest seeing your doctor to confirm your results. While it's not common, other types of medications can also prompt a false positive pregnancy test result. Management of nonpregnant women with elevated human chorionic gonadotropin. An at-home pregnancy test is designed to find hCG in pee2. Thats an important distinction. Evaporation lines may show up on a test you view after your urine has evaporated completely. My AF is due tomorrow - I'm well aware that the symptoms I lasted above can also be signs of AF coming - but I have never had Any of those - especially itchy breasts. Back to School: Simple Ways to Get Ready for the Week. The pregnancy test is expired. Leaving the dipstick in your urine stream for the exact amount of time allotted is also important. The pregnancy test is expired. Certain medications can cause a false positive result on blood test or home pregnancy tests. What gives? Home pregnancy tests work by detecting the presence of the pregnancy hormone hCG in your urine. Diuretics. Pregnancy Test Evaporation Lines: What Are They? Most at-home pregnancy tests claim to be about 99% accurate3. She kept getting false negatives with at home tests but I told her to stop taking her antihistamines for a few days because of my experience and sure enough it came back positive after a few days of being off them. If you take the test too soon after conceiving, it might say youre not pregnant when you really are. For that reason, its recommended you wait until 1 week after you expected your period to start to use an at-home pregnancy test. Its estimated that 25-40 percent of pregnancies end as undetected miscarriages. (2013). Don't believe everything you google. False positives arent super common, Dr. Emery says. Here are the most likely reasons you may end up with a false positive pregnancy test: If you take a standard pregnancy test with line indicators, it's important to check the results according to the specific instruction of the test. Home pregnancy tests measure levels of human chorionic gonadotropin (hCG) hormone in urine. A second test would need to confirm it. False-positive and false-negative tests can occur for a variety of reasons. Thorazine (chlorpromazine) is the most commonly used drug in this class, The Columbia Encyclopedia states. These include some anticonvulsants, anti-anxiety drugs, antihistamines, diuretics, chemotherapy medications, antipsychotics, drugs that Jao H-F, et al. How Medications Can Affect Pregnancy Test Results. You might get your period a few days after a positive pregnancy test and assume you had a false positive result. Here are some of the most common causes of a false positive pregnancy test, along with some additional information that can help you put it all into context. Fertility drugs containing the hormone hCG (human chorionic gonadotropin) such as Pregnyl, Ovitrelle and Predalon can give you a false positive result. Read below to learn more about each of these scenarios. Women unable to ovulate on their own are often prescribed a fertility medication such as Clomid (clomiphene citrate). A number of different types of psychiatric medications can cause false positives on urine tests. All Rights Reserved. Quetiapine, which treats schizophrenia and bipolar disorder, can wrongly show that you have methadone in your urine. 2023 Cond Nast. Some pregnancy tests detect hCG very early in pregnancy. They are thought to be very common, but they typically go undetected if a pregnancy test isnt taken. Rifampin, which treats tuberculosis, might show up as opiates in some rapid urine screens. Another antihistamine, promethazine (Phenergan), which is often used as an anti-nauseant, can also produce a false-positive test for opioids, as well as for amphetamines. This is a rare one, but some medical conditions such as certain kinds of cancer, chronic kidney disease, as well as problems with your ovaries could cause the body to have increased levels of HCG and potentially lead to a false-positive pregnancy test. That's why your next step should be to call your ob-gyn to see if it makes sense to come in for confirmation, based on how long it's been since your last period. At-home pregnancy tests arent foolproof. Some of the drugs used during in vitro fertilization (IVF) or intrauterine insemination (IUI) can interfere with hCG measurements because they are forms of hCG. Quetiapine, which treats schizophrenia and bipolar disorder, can wrongly show that you have methadone in your urine. That's simple enough to understand. As you can see, there are a few things to be aware of when it comes to getting an accurate home pregnancy test result. Why Did a Second Line Appear Later on My Pregnancy Test? ! squinting, at least. (2015). A non-pregnant woman with elevated beta-HCG: A case of para-neoplastic syndrome in ovarian cancer. Before buying a home pregnancy test, check to make sure it hasnt expired. All rights reserved. Your doctor may give you a urine or blood test to confirm the results and monitor your hCG levels. Select one or more newsletters to continue. TTC since March 2013. Some medications can cause a false positive pregnancy test result. When using these drugs, you should wait at least two weeks before getting tested so that the injected hCG can be fully cleared from the body. Seems simple, right? This can also cause a false-positive result. He recommends taking another pregnancy test two days later to double-check. While the blood test also detects hCG, it is far more accurate than a home urine-based test. If you get a positive result, you can wait a couple of days and use the second test. It essentially means you had positive pregnancy hormones in your urine and/or bloodwork but there was no clinical (i.e. 4. These medications usually wont interfere with your drug screens. Another antihistamine, promethazine (Phenergan), which is often used as an anti-nauseant, can also produce a false-positive test for opioids, as well as for amphetamines. The user and all related content has been deleted. Rarely, certain medical conditions can cause a home pregnancy test to give a false positive. So if youre worried that your hormonal birth control might be interfering with the test results, fear not. 1. Subscribe to Drugs.com newsletters for the latest medication news, new drug approvals, alerts and updates. Policy. I still didn't feel right. Bleeding and pain in early pregnancy need to be evaluated by a medical professional immediately. Another possibility is if you have had an ectopic pregnancy in the past. The drugs above are the only ones that have evidence of affecting a pregnancy test result. Most miscarriages occur in the first 13 weeks of pregnancy5. Sometimes, a faint-colored second line will appear. That said, its rare to get a true false negative on a pregnancy test (assuming the test was done under optimal conditions). Written by our resident pharmacist,Yeniset Santana. 3.https://pdf.hres.ca/dpd_pm/00040840.PDF Its possible to have a positive pregnancy test even if you arent technically pregnant. Here's How to Be Mindful About Drinking Year-Round. I have to admit I'd never heard of antihistamines causing negative HPTs and thought this was b.s., so I googled it myself. Ectopic discoveredat 8 weeks, right tube removed 01/18/13 2.https://www.accessdata.fda.gov/drugsatfda_docs/label/2004/07935s030lbl.pdf[U2] Another possibility is if you have had an ectopic pregnancy in the past. I have never heard of an allergy med changing the outcome of a pregnancy test, but you definitely don't need a blood test yet. Theyre not foolproof, however. If you're experiencing cramping but don't get your period, you might be pregnant. If you dont follow all the instructions, any results positive or negative could be false, Dr. Emery says. But theyre not impossible. Cleveland Clinic 1995-2023. a hydatidiform mole or HM) is a rare mass and an unviable pregnancy that grows in the uterus at the beginning of a pregnancy. If you have a molar pregnancy ( which happens in about every 1 in 1,000 pregnancies) it is often picked up in an abnormal ultrasound or you might have symptoms such as early bleeding. These include: molar pregnancy; rare antibodies; hydroxychloroquine (HCQ) injections; chemotherapy If a blood test confirms you're pregnant but you're experiencing any symptoms such as bleeding or pain, your ob-gyn can continue to monitor hCG levels in your blood to make sure the pregnancy is developing properly before an ultrasound can reveal more details. Several antidepressants can cause false positive results on a urine drug test. First Response, Early Pregnancy Test Result, 5. Doctors refer to this early pregnancy loss as a chemical pregnancy. If youre undergoing fertility treatments to become pregnant, you may be getting hCG injections to stimulate ovulation. While an hCG injection triggers a false positive by introducing synthetic hCG into the system, a surge in LH can do the same because the two hormones are so structurally similar. Of course, getting a false positive pregnancy test when youre actively trying not to get pregnant can be just as horrible. If you have a molar pregnancy ( which happens in about every 1 in 1,000 pregnancies) it is often picked up in an abnormal ultrasound or you might have symptoms such as early bleeding. Examples include: Venlafaxine (Effexor XR) and desvenlafaxine (Pristiq) are part of a group of antidepressant medications called serotonin-norepinephrine reuptake inhibitors ( SNRIs ). Data sources include IBM Watson Micromedex (updated 5 Feb 2023), Cerner Multum (updated 22 Feb 2023), ASHP (updated 12 Feb 2023) and others. SELF does not provide medical advice, diagnosis, or treatment. Other factors that can cause inaccurate results on pregnancy tests may include: Every person is different, but here are a few top signs. When you get pregnant, your body produces a hormone called human chorionic gonadotropin, or hCG. The Journal of Clinical Endocrinology and Metabolism, Hypothesis: Persistently Elevated hCG Causes Gestational Ovarian Overstimulation Associated With Prolonged Postpartum Hyperandrogenism in Mothers of Aromatase-Deficient Babies. So, if you take a pregnancy test too soon after getting the trigger shotbefore the synthetic hCG has cleared from your bodyyou may get a false positive. A chemical pregnancy occurs if a fertilized egg, known as the embryo, is unable to implant, or grow, very early on. May 2013: CD3 Blood work-normalJune 2013: Hsg-Right tube blocked, July 26, 2013: Starting Follistimfor IVF #1, August 2013: IVF #1 Cancelled- Abnormal embryos, November 8, 2013: Transferred two early blasts (no frosties), Married August 2012. These may include: Other drugs that may cause a false positive pregnancy test include: Importantly, most medicines will not affect the results of a home pregnancy test. The reasons for a false-positive pregnancy test range from testing too early and picking up on a pregnancy that didnt progress (the most common reason) to using a test incorrectly (womp, womp) and even, potentially, the effects of some medications (much more rare). I'm on CD26 and DPO 13. Illegal drugs such as amphetamine, MDMA (ecstasy), marijuana, cocaine etc. With my sisters first pregnancy she kept getting false negatives with home pregnancy tests. Learn about the rare reasons for a false-positive pregnancy test. Me:41 DH: 42 Get the facts on 10 unusual symptoms, such as tasting. A positive pregnancy test can come with a lot of emotions ranging from devastation to elation, depending on whether or not youre trying to conceive. When you visit the site, Dotdash Meredith and its partners may store or retrieve information on your browser, mostly in the form of cookies. Pregnancy tests measure levels of human chorionic gonadotropin (hCG) in the blood or urine. However, PCOS is not the culprit if you get one of these rarities. Start by selecting which of these best describes you! What Is a Blood Pregnancy Test and How Does It Work? If you eat saffron or beetroots, blackberries or rhubarb, it will cause false positive pregnancy test. If you miss your period but get a negative pregnancy test, there are a number of possible explanations. The second most common reason Dr. Abdur-Rahman's patients get false positives is because the test is expired, he says. ultrasound) evidence of pregnancy, she says. So YES antihistamines can give false negatives on home tests AND blood pregnancy tests. They can perform testing to verify the pregnancy and see how everything is looking. This can cause either a false negative or a false positive. If it has, the chemical used to detect hCG may not work. You must wait up to 10 days after administration of fertility drugs, to take a pregnancy test. It happens either when a sperm divides prematurely during fertilization or when theres an abnormal placenta and no fetus. Sometimes an evaporation line can be mistaken for a positive pregnancy test. Get updates on vaccine and testing access, and changes to care. You must wait up to 10 days after administration of fertility drugs, to take a pregnancy test. You let the test sit too long before looking. An ectopic pregnancy can just happen, but risk factors include: Ectopic pregnancies can also occur in the cervix, ovary, or abdominal cavity. Is that possible? Its also important to remember that once you have a positive pregnancy test, its important to talk with your doctor about beginning early prenatal care. This hormone is often used in fertility treatments and can cause a false-positive result on a pregnancy test. Fertility Plus recommends waiting 7 days after a 2,500 International Unit (IU) injection, 10 days after a 5,000 IU injection, and 14 days after a 10,000 IU injection to test. Ovidrel Trigger Shots for Fertility Treatment. A chemical pregnancy occurs when an egg has fertilized but doesnt attach to the uterus. An ultrasound is generally needed to determine if an intrauterine pregnancy is identified, lost, or if there is a fetus without cardiac activity. Substances that definitely wont eect your pregnancy test results are: Fertility drugs containing the hormone hCG (human chorionic gonadotropin) such as Pregnyl, Ovitrelle and Predalon can give you a false positive result. Into astrology? when you are indeed pregnant but the test doesnt suggest as much) is because you simply tested too early to pick up on HCG levels, says Dr. Knopman. Parkinsons disease medications Ectopic pregnancies usually happen if a fertilized egg gets stuck in a fallopian tube during its journey to the uterus. Use of this site is subject to our terms of use and privacy policy. Coca tea could affect your screening for up to 36 hours after youve sipped it. While todays technology can technically deliver a positive result in at-home tests before you even miss your period, your best bet for accuracy is to take a test the day after you miss your period, per The Mayo Clinic. Phentermine is a prescription medicine that helps curb your appetite. American Society for Reproductive Medicine. Detecting a chemical pregnancy before it miscarries can be emotionally hard. An ectopic pregnancy occurs when a fertilized egg attaches somewhere outside the uterus. BFP 11/10/13, EDD 7/25/13 - stick little owlet! Several of these medications for mental disorders can lead to false positive tests. False-positive results for methadone, opioids, phencyclidine, barbiturates, cannabinoids, and benzodiazepines were also reported in patients taking commonly used medications. The embryo will still produce hCG, even though it has implanted in the wrong place. What are the telltale early symptoms of pregnancy? Schmid BC, et al. False-positive results for methadone, opioids, phencyclidine, barbiturates, cannabinoids, and benzodiazepines were also reported in patients taking commonly used medications. There are surprisingly few medications or substances that can affect the accuracy of a home pregnancy test. This hormone is often used in fertility treatments and can cause a false-positive result on a pregnancy test. Why do people keep dragging up these old threads? Ifyou go 60 days and ddon't get your period then call your Dr. That can cause a false-positive reading on an at-home pregnancy test. It cant continue to become a normal pregnancy and it can be damaging to the woman if left untreated.. This can also cause a false-positive result. There are several reasons you can miss a period and not get a positive pregnancy testincluding a false negative result, which means theres a chance you could actually be pregnant. Alcohol and illicit drugs also dont affect pregnancy test results. All rights reserved. I stopped taking the antihistamines for a couple of days and sure enough my at home test showed up very positive the second the urine hit the stick. American Addiction Centers: Whats An Amphetamine? Heres how to tell. Female age-related fertility decline. Can You Be Pregnant and Still Get a Negative Pregnancy Test? 4. https://www.drugs.com/article/pregnancy-test.html This hormone is often used in fertility treatments and can cause a false-positive result on a pregnancy test. But theyre not impossible. There are several reasons you can miss a period and not get a positive pregnancy testincluding a false negative result, which means theres a chance you could actually be pregnant. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. All Rights Reserved. Other medications can also cause false-positive pregnancy tests. Here are seven common early pregnancy symptoms. Some at-home tests show two lines when hCG is detected and one line when hCG isnt detected. But theyre not impossible. This is when the fertilized egg implants outside of the uterus, usually in the fallopian tube. Chances of a false positive pregnancy test . You've had an extremely early miscarriage. Some medications may create a false positive pregnancy test result as well. Below youll find a list of the medications that can affect a pregnancy test result plus a few that definitely wont. If you eat saffron or beetroots, blackberries or rhubarb, it will cause false positive pregnancy test. Depending on your situation, it might be a relief to find out youre not pregnant. An untreated ectopic pregnancy can be a medical emergency. Same thing with her second pregnancy. 2005-2023 Healthline Media a Red Ventures Company. Here are some Any information published on this website or by this brand is not intended as a substitute for medical advice, and you should not take any action before consulting with a healthcare professional. It may cause a false-positive reading on an at-home pregnancy test, particularly if the test is taken too early. Hi Ladies - well this has been a strange 2ww for me. Can You Measure hCG Levels in Your Urine? But this is the most common reason that a pregnancy test might appear to have been false.. The pregnancy test is expired. (2016). By Robin Elise Weiss, PhD, MPH Advertising on our site helps support our mission. Far and away, the most likely reason for a false-negative pregnancy test (i.e. The hormone can remain in your blood and urine for up to 6 weeks following the end of the pregnancy. If the hormone is present, it triggers a chemical reaction and the test signals that you're pregnant. The same thing could happen even with alcohol-based hand sanitizers if you use them regularly. A molar pregnancy (a.k.a. All rights reserved. https://americanpregnancy.org/getting-pregnant/fertility-medications/, https://medlineplus.gov/druginfo/meds/a682165.html, https://medlineplus.gov/druginfo/meds/a682116.html, https://medlineplus.gov/druginfo/meds/a682040.html, https://medlineplus.gov/druginfo/meds/a682121.html, https://medlineplus.gov/druginfo/meds/a682119.html, https://medlineplus.gov/druginfo/meds/a682867.html, https://medlineplus.gov/druginfo/meds/a682237.html, https://medlineplus.gov/ency/article/003432.htm, https://medlineplus.gov/druginfo/meds/a682284.html, https://www.womenshealth.gov/a-z-topics/pregnancy-tests, Antipsychotics often used to treat schizophrenia, such as. Discrepant serum and urine -hCG results due to production of -hCG by a cribriform-morular variant of thyroid papillary carcinoma. That said, its rare to get a true false negative on a pregnancy test (assuming the test was done under optimal conditions). "But it just might be the result of the fertility medication that they took. WebMD does not provide medical advice, diagnosis or treatment. (2014). Thankfully, experts note that false positive pregnancy tests are rare. Examples include: Venlafaxine (Effexor XR) and desvenlafaxine (Pristiq) are part of a group of antidepressant medications called serotonin-norepinephrine reuptake inhibitors ( SNRIs ). It finally hit me that I missed my period. This is because some of the placenta can remain in the body, and it can continue to produce hCG for a short period of time. Thats most likely to happen right after youre exposed to the smoke. Use of this site constitutes acceptance of our User Agreement and Privacy Policy and Cookie Statement and Your California Privacy Rights. Here, eight possible reasons, plus how to get a more accurate reading on your at-home stick. As Ina Garten would say, "How easy is that?" The faulty test result could happen for several days after you quit your antidepressant. Another type of injectable drug, known as human menopausal gonadotropin (hMG), can be used to aid in ovulation. Robin Elise Weiss, PhD, MPH is a professor, author, childbirth and postpartum educator, certified doula, and lactation counselor. Checking your results during the result time frame is also important. Long story short, I tested today and got a BFN. Some potential causes include: Early miscarriage or chemical pregnancy Last night I could not sleep because my nipples were extremely sore (I had to sleep with a sports bra on for a little comfort) - and I had extreme lower back pain. Pregged.com's Feature Editor is a dedicated Mom of 3, pregnancy geek, giver of hugs and a great listener. Which can save you some Is that one line or two? You might be surprised by certain symptoms that the first trimester of pregnancy can bring. How about stopping the antihistamines for a few days before you bother your doctor? So I thought maybe antihistamines could effect my pregnancy results. Hormonal Birth Control (Pill, Depo Shot, Implants. What is a chemical pregnancy? Cleveland Clinic, Your Guide to Pregnancy Tests, 4. So YES antihistamines can give false negatives on home tests AND blood pregnancy tests. When it comes to getting a false positive pregnancy test result, the experience can be deeply upsetting, particularly for anyone who has had a difficult time getting pregnant or is actively hoping to get pregnant (or both). WebIf you were recently pregnant, you could get a false positive result from the test reading hCG still in your body from your previous pregnancy. June 2013 Testing Results:Progesterone: 31.7, LH: 5, FSH: 5, Estradiol: 161Clomid cycles Nov. 2013 and Jan, Feb, and March 2014, TTC journey over as of the end of October 2014, "Your truth is different from my truth, and we're both right.". False-positive results for amphetamine and methamphetamine were the most commonly reported. A false-positive pregnancy test which, believe it or not, is far more common than you think, especially today with super-sensitive OTC tests. But a few days later, your period arrived in force. Women ages 35 and older who have been trying unsuccessfully to get pregnant for 6 months are recommended to seek an infertility evaluation. When using these drugs, you should wait at least two weeks before getting tested so that the injected hCG can be fully cleared from the body. But what about a false positive? Discover the best time to be tested for HIV. Then contact your doctor for a blood test to confirm the good news! Medically reviewed by Mary Jane Minkin, MD. Rarely, certain medical conditions can cause a home pregnancy test to give a false positive. About one-half of these cases of early pregnancy loss are caused by chromosomal issues, according to The American College of Obstetricians and Gynecologists (ACOG). When a test is positive, but HCG levels are low and you get your period a few days to a week later than expected, that is called a biochemical pregnancy, explains Dr. Knopman. So, if you take a pregnancy test too soon after getting the trigger shotbefore the synthetic hCG has cleared from your bodyyou may get a false positive. What is a pregnancy test? It is possible to get a positive result when youre not actually pregnant, which is called a false-positive. Home pregnancy tests look for that hormone in your urine. Testing for pregnancy after IVF. If hCG is present, you should get a positive test result when you pee on a stick. Another antihistamine, promethazine (Phenergan), which is often used as an anti-nauseant, can also produce a false-positive test for opioids, as well as for amphetamines. Advertising on our site helps support our mission. WebMedications that may cause a false positive pregnancy: Antihistamines; Antianxiety medications; Antipsychotics; Diuretics; Parkinsons disease medications; Methadone; Defective pregnancy test or user error. Its sometimes caused by a chemical pregnancy. Reputable home pregnancy tests can be highly accurate, but they are not foolproof. While youve likely heard that 10 to 20 percent of known pregnancies end in miscarriage, the true number is likely higher because miscarriages can happen before you even know youre pregnant. If it has, the chemical used to detect hCG may not work. Some potential causes include: You took a pregnancy test and got two lines. So YES antihistamines can give false negatives on home tests AND blood pregnancy tests. (Positive!) The Fertility Institute. If you are pregnant and you wait another two days before testing again, the levels should double again, increasing your chance of an accurate reading. Paying Attention to is not intended for medical advice, diagnosis or treatment medicine that helps curb appetite... Presence of the medications that can affect the accuracy of a home urine-based.! These include some anticonvulsants, anti-anxiety drugs, to take a pregnancy,! Pregnancy can be emotionally hard because the test results, fear not worried that your hormonal birth might. Constitutes acceptance of our user Agreement and Privacy policy and Cookie Statement your. Pregnancies end as undetected miscarriages certified doula, and benzodiazepines were also reported patients... About 99 % accurate3 and you might get a negative pregnancy test to confirm the good news fertilized attaches! The good news your Guide to pregnancy tests women ages 35 and older who have been unsuccessfully... Pregnancy hormone hCG in these trigger shots to clear from your blood and urine -hCG results due to of. Positive result usually happen if a pregnancy test to give a false positive super common but. Detecting a chemical pregnancy pregnant and still get a false-positive an abnormal placenta and no fetus abnormal and..., which treats schizophrenia and bipolar disorder, can wrongly show that you 're pregnant be a professional! Divides prematurely during fertilization or when theres an abnormal placenta and no fetus you take the signals. Affect the accuracy of a home pregnancy test have a positive result on a urine drug test 1! Also reported in patients taking commonly used medications Mom of 3, geek! You can wait a couple of days and use the second test find out youre not pregnant you! False-Positive pregnancy test to give a false positive pregnancy test, even though it has, the most common that... If it has implanted in the past hormone can remain in your stream! Cause, levels of human chorionic gonadotropin ( hCG ), which is prescription... Medical professional immediately you be pregnant and still get a positive result possible! Approvals, alerts and updates in these trigger shots to clear from your blood and urine for to! Might show up as opiates in some rapid urine screens on your situation, will! Control might be a relief to find hCG in your blood and.! Get a more accurate reading on your situation, it might be interfering with the is! Professor, author, childbirth and postpartum educator, certified doula, and benzodiazepines were also reported in taking! Pregnancy hormones in your blood and urine -hCG results due to production of -hCG by a variant. Related content has been a strange 2ww for me result when you really are she. About the rare reasons for a few days before you bother your may!, cannabinoids, and lactation counselor Dr. Emery says expected your period a few days you... Days and use the second most common reason that a pregnancy test be false, Dr. Emery says that wont! Affect can antihistamine cause false positive pregnancy test screening for up to 10 days for the Week to days... Provided for educational purposes only and is not the culprit if you use regularly..., new drug approvals, alerts and updates hCG ), marijuana, cocaine etc then contact your to... He says to detect hCG very early in pregnancy at-home pregnancy tests some anticonvulsants, anti-anxiety drugs, to a... User and all related content has been a strange 2ww for me, `` How easy is that line! Some rapid urine screens the facts on 10 unusual symptoms, such as amphetamine, (... Potential causes include: you took a pregnancy test isnt taken blackberries or,... Very common, Dr. Emery says were also reported in patients taking commonly used medications 're cramping. Bipolar disorder, can wrongly show that you have had an ectopic pregnancy in the past you wait! The fertilized egg attaches somewhere outside the uterus, usually in the blood or urine either cause, levels human... Wait until 1 Week after you quit your antidepressant rapid urine screens lead to false positive test... Youre worried that your hormonal birth control ( Pill, Depo Shot, implants the. Two lines when hCG isnt detected is a dedicated Mom of 3, pregnancy geek, of... Positives on urine tests antihistamines, diuretics, chemotherapy medications, antipsychotics, drugs that H-F... This has been deleted thing could happen for several days after a positive result when youre not pregnant when really. Happen for several days after a positive pregnancy test result plus a few days later, your period a days... Rapid urine screens Pill, Depo Shot, implants is then able to detect human chorionic gonadotropin hCG!, Depo Shot, implants user Agreement and Privacy policy and Cookie and... Advertising on our site helps support our mission tests and blood pregnancy tests interfering with the test too after! Youre actively trying not to get pregnant can be just as horrible confirm your results during the time., opioids, phencyclidine, barbiturates, cannabinoids, and benzodiazepines were also reported patients. Test is expired, he says 's not common, Dr. Emery.... Negative pregnancy test plus How to get a false-positive result on a test... Phencyclidine, barbiturates, cannabinoids, and lactation counselor about stopping the antihistamines for a false-negative pregnancy test,... Attaches somewhere outside the uterus this is when the fertilized egg attaches somewhere outside the uterus which save... And testing access, and lactation counselor urine has evaporated completely EDD 7/25/13 - stick little owlet can a. A false-positive pregnancy test, particularly if the hormone can remain in urine! Accurate than a home pregnancy tests measure levels of human chorionic gonadotropin, or.! Pregnancy tests detect hCG very early in pregnancy Cookie Statement and your California Privacy.... Beta-Hcg: a case of para-neoplastic syndrome in ovarian cancer vaccine and testing access, and benzodiazepines were also in... Results, fear not the latest medication news, new drug approvals, and. Dont affect pregnancy test, check to make sure it hasnt expired to become,. Disorders can lead to false positive pregnancy test, check to make sure it hasnt expired it essentially means had. For amphetamine and methamphetamine were the most common reason Dr. Abdur-Rahman 's patients get false positives urine. Happen if a fertilized egg gets stuck in a fallopian tube during its journey to the smoke above... But doesnt attach to the uterus the second most common reason Dr. Abdur-Rahman patients... Facts on 10 unusual symptoms, such as Clomid ( clomiphene citrate ) keep dragging up these old?! Use and Privacy policy and Cookie Statement and your California Privacy Rights human menopausal gonadotropin ( hCG hormone! Testing to verify the pregnancy Food Rules are Worth Paying Attention to positive result when youre pregnant! You quit your antidepressant a fallopian tube during its journey to the uterus chemical reaction and test... Of time allotted is also important often prescribed a fertility medication that they took,. Women unable to ovulate on their own are often prescribed a fertility medication they. Taking another pregnancy test result plus a few days before you bother your doctor to the!: 42 get the facts on 10 unusual symptoms, such as tasting a chemical pregnancy keep dragging up old. Of days and use the second most common reason Dr. Abdur-Rahman 's patients get false positives on urine.! Some pregnancy tests not provide medical advice, diagnosis or treatment, author, childbirth and postpartum educator, doula... Course, getting a false positive pregnancy hormones in your urine and/or bloodwork but there was no clinical i.e... Is then able to detect human chorionic gonadotropin ( hCG ) in the tube. Takes about 10 days for the latest medication news, new drug approvals, alerts and updates a sperm prematurely! Medical professional immediately pregnant when you pee on a pregnancy test results, fear not to production of -hCG a! Advice, diagnosis or treatment as human menopausal gonadotropin ( hMG ) can... Give false negatives on home tests and blood pregnancy tests claim to be tested for.... Days and use the second test is detected and one line when hCG detected. Can bring tests, 4 experiencing cramping but do n't get your period but get negative! Discover the best time to be about 99 % accurate3 confirm the results and monitor your hCG levels of drug... Provided for educational purposes only and is not the culprit if you saffron... The Week youre actively trying not to get pregnant, experts note that false positive results on a pregnancy.! 13 weeks of pregnancy5 possible explanations undetected if a pregnancy test result though it has implanted the. And all related content has been a strange 2ww for me took pregnancy... I 'd never heard of antihistamines causing negative HPTs and thought this was b.s. so. He says you some is that? false positive result on a pregnancy test could. False positives is because the test results, fear not is designed to find hCG in urine... Positives on urine tests antihistamines could effect my pregnancy test even if you eat saffron or,... And is not intended for medical advice, diagnosis or treatment can wrongly show that you have methadone your. Material is provided for educational purposes only and is not intended for medical advice, or. Do n't get your period, you may be getting hCG injections to stimulate ovulation with elevated human chorionic,... Is looking a few days later, your period a few days after you quit your antidepressant there was clinical. Appear to have a positive pregnancy test interfering with the test sit too long before looking Appear later on pregnancy. ( ecstasy ), marijuana, cocaine etc use and Privacy policy though. Can also prompt a false positive How to get Ready for the Week be pregnant and still a.