what medications can cause a false positive pregnancy test

Sometimes, a faint-colored second line will appear. However, keep in mind that the earlier you take the test, the harder it is for the test to detect hCG. (2015). Diphenhydramine (Benadryl) 3. You can learn more about how we ensure our content is accurate and current by reading our. WebWhat are other conditions that can cause a positive test for hCG aside from pregnancy? You can use an at-home pregnancy test on the first day of a missed period. Diuretics (water pills) Antihistamines. The best way to avoid a false-positive pregnancy test is to wait at least a week after youve missed your period to take the test. How medications affect pregnancy test results. A chemical pregnancy occurs when an egg has fertilized but doesnt attach to the uterus. Progestin-only birth control pills, including: Anti-nausea drugs, including prochlorperazine, perphenazine, chlorpromazine and promethazine, Sedatives that are used before and after surgery or during labor, such as promethazine, Anti-anxiety medications such as prochlorperazine and trifluoperazine. Your healthcare provider may request a urine drug test to make sure there arent other substances in your system that could be dangerous when combined with opioids. False-positive amphetamine toxicology screen results in three pregnant women using labetalol. It is possible to get a positive result when youre not actually pregnant, which is called a false-positive. Methadone, given to treat heroin addiction, can cause a false positive result on urine pregnancy tests, Cigna states. 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. This is due to the residual level of hCG present in the woman. But on a drug screen, it can make you seem to have used marijuana. CBD, which doesnt make you high, is used for medical marijuana to ease pain and other symptoms. Levofloxacin (Levaquin) and ofloxacin are the most likely of the quinolone antibiotics to cause a false positive urine test for opiates. Any medication that contains hCG can cause a false positive pregnancy test result. American Family Physician. A false-positive might happen if you had a pregnancy loss soon after the fertilized egg attached to the uterine lining.You also may get a false-positive if you take a pregnancy test soon after taking fertility medicine that contains HCG . Its made with the leaves of the same plant that cocaine comes from. 2005 - 2023 WebMD LLC, an Internet Brands company. The embryo will still produce hCG, even though it has implanted in the wrong place. A chemicalpregnancy occurs when the embryo is not able to implant. A drug test can detect the presence of certain medications and substances. The hormone is a glycoprotein that comprises an alpha subunit and beta subunit. Check the expiration date and read through the directions. There are many reasons you might get a urine drug screen. Is the stick always right? If you think you may have a medical emergency, immediately call your doctor or dial 911. WebMD does not provide medical advice, diagnosis or treatment. Anti-nausea drugs, including prochlorperazine, perphenazine, chlorpromazine and promethazine Sedatives that are used before and after surgery or during labor, such as promethazine Importantly, most medicines will not affect the results of a home pregnancy test. Alcohol and illicit drugs also dont affect pregnancy test results. (2006). You usually conceive and become pregnant after the implantation takes place. Methadone. Doxylamine is an OTC medication that may help people struggling to fall asleep at night. A small quantity of this hormone is also secreted by the colon, liver, and pituitary gland. Clinical Toxicology. Get prescription saving tips and more from GoodRx Health. Its important to read and follow the test instructions carefully. Below we'll review a few that might have this effect. 5 Foods to Avoid When You Have Depression, How to Ensure Your Doctor Understands Your Migraine Severity. WebMedical Conditions. Taking oxaprozin may result in a false positive test for benzodiazepines. Your privacy is important to us. The content on Healthgrades does not provide medical advice. Bupropion (Wellbutrin XL, Wellbutrin SR) may lead to false positive results for amphetamine or methamphetamine. Many urine drug tests test for the following medications and substances: THC, or tetrahydrocannabinol, an active ingredient in cannabis, Prescription opiates and opioids like oxycodone (Roxicodone, Oxycontin), hydrocodone, and morphine (MS Contin), Illegal opiates and opioids (like heroin), Amphetamines (like prescription amphetamines like Adderall and illegal methamphetamine), Barbiturates (like phenobarbital, butalbital), Benzodiazepines like alprazolam (Xanax) and lorazepam (Ativan). Ecstasy/MDMA. Home pregnancy tests work by detecting the presence of human chorionic gonadotropin (hCG) in a urine sample. Women unable to ovulate on their own are often prescribed a fertility medication such as Clomid (clomiphene citrate). Last medically reviewed on February 24, 2022. Jao H-F, et al. These medications usually wont interfere with your drug screens. HCG, sold under brand names of Pregnyl, Profasi or Novarel, may also be given after ovulation or embryo transfer to boost progesterone output and increase the chance of implantation, the Pacific Fertility Center states. It may also cause a positive result for benzodiazepines. You usually experience this problem due to genetically abnormal pregnancies. Just like with job interviews, some employers may require their employees to complete drug tests every so often. A false positive is when a drug test shows the presence of a medication or substance that you didnt actually take. Then contact your doctor for a blood test to confirm the good news! American Psychological Association. Investigation of interference by nonsteroidal anti-inflammatory drugs in urine tests for abused drugs. Baden, L.R., et al. Many sources state that methylphenidate can cause false positive results for amphetamines. WebMedications that may cause a false positive pregnancy: Antihistamines Antianxiety medications Antipsychotics Diuretics Parkinsons disease medications Methadone THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. Its chemically similar to amphetamines, a stimulant used to treat ADHD and as a study aid to stay awake. If youve received a false positive, your doctors visit will determine that. A false-negative test may also cause women who have a higher level of hCG due to the association of antibody in the test kit with degraded hormonal fragments instead of the intact hormone. Trazodone, meta-chlorophenylpiperazine (an hallucinogenic drug and trazodone metabolite), and the hallucinogen trifluoromethylphenylpiperazine cross-react with the EMITII ecstasy immunoassay in urine. You might be surprised by certain symptoms that the first trimester of pregnancy can bring. An ectopic pregnancy can be a serious emergency for the pregnant parent if the growing embryo ruptures the fallopian tube causing severe bleeding. Its sometimes caused by a chemical pregnancy. After a miscarriage or abortion, the hCG hormone may remain in your system for up to 6 weeks. Set a timer when it is time to wait for the results and read them according to the recommended window of time. The hormone can remain in your blood and urine for up to 6 weeks following the end of the pregnancy. Multiple medications can cause false positive results. Apart from the normal pregnancy, tests for hCG levels also provide important information related to aborted pregnancy, pathological pregnancy and other serious medical conditions including extra-uterine malignancies and choriocarcinoma. Various medications also interfere with the testing of pregnancy through pregnancy kits and may cause false-positive results. Phenothiazines and phenothiazine derivatives are antipsychotic medications used to treat psychiatric disorders that can also give false positive results on urine pregnancy tests. Fraser, A.D., et al. However, the chance is small. Discrepant serum and urine -hCG results due to production of -hCG by a cribriform-morular variant of thyroid papillary carcinoma. But there are a few things you should avoid doing. Not cleaning the cup that comes with certain pregnancy test kits can also cause contamination of the urine sample and affect your results. Healthgrades Can Help. All rights reserved. Consider setting a timer on a stopwatch or your phone. You may get a false positive on a pregnancy test for a number of reasons, including if you take the test too early or are taking certain fertility medications. Immunochromatographic tests: False-positive results for methadone and phencyclidine after acute poisoning with tramadol and dextropropoxyphene. Committee Opinion No. It is best to wait a week after your missed cycle to take a pregnancy test because it may lead to a false-positive pregnancy test. masso 10 March 2023. It helps lower blood pressure in people with high blood pressure (hypertension). Always consult a medical provider for diagnosis and treatment. Read below to learn more about each of these scenarios. (2010). There is also the potential for user error when taking a pregnancy test. Trademarks, brands, logos, and copyrights are the property of their respective owners. And then you later find out it was just a false positive. Back to School: Simple Ways to Get Ready for the Week. Sometimes an evaporation line can be mistaken for a positive pregnancy test. That may lead to false-positive results. False-positive TDxFLx urine amphetamine/metamphetamine II assay from ofloxacin. Now you know the answer, and it is important to talk to your doctor when you are not sure if you are really pregnant or have received false positives. They include but arent limited to: Rarely, certain medical conditions can cause a home pregnancy test to give a false positive. Your drug screen could become positive for methadone or PCP with large doses of tramadol. They may also order a transvaginal ultrasound to confirm that the pregnancy is proceeding normally. Taking phentermine can cause false positive urine test results for amphetamines. Librium (chlordiazepoxide), an anti-anxiety medication also used to control agitation during alcohol withdrawal, can cause false positive pregnancy results in urine pregnancy tests, Medline Plus states, but blood tests will not show false positive results. How Many Days Your Period Can Be Late For? All rights reserved. Some infertility medications (medications that are used when a False-positive interferences of common urine drug screen immunoassays: A review. Urine drug tests can be a common part of an evaluation in an emergency department. How Long Until hCG Falls to Zero After Miscarriage? One of the fallopian tubes is a common area for an ectopic pregnancy to implant. Rifampin, which treats tuberculosis, might show up as opiates in some rapid urine screens. WebWhat can cause 3 false positive pregnancy test? Certain medications. In such cases, the blood tests and ultrasound are done to confirm pregnancy. They may be able to run a second test to confirm whether these results are accurate or not. Interpreting Faint Lines on a Pregnancy Test. Using an expired kit can cause false positives. These medications can sometimes cause a false-positive on your pregnancy test. Copyright WWW.NEWHEALTHADVISOR.ORG 2014, All rights Reserved. Learn more about how we ensure our content is accurate, thorough, and unbiased by reading our. Evaporation lines may also create confusion and lead to the assumption of a pregnancy that is not present. WebWhat can cause a false urine pregnancy test? a recent pregnancy (e.g. Evaporation lines may show up on your test after your urine completely evaporates, usually within 10-30 minutes. An ectopic pregnancy is a real pregnancy that will return a positive pregnancy test; however, the pregnancy is nonviable, meaning it cannot result in a live birth. Acta Clinica Belgica. Phenergan, a medication used to treat nausea and allergic reactions, can also give false positive results. Several of these medications for mental disorders can lead to false positive tests. Available for Android and iOS devices. Home pregnancy tests measure levels of human chorionic gonadotropin (hCG) hormone in urine. Diphenhydramine is an antihistamine that can help treat allergies, itching, and cold symptoms. At-home pregnancy tests arent foolproof. This hormone helps your body maintain the pregnancy. If youve been trying unsuccessfully to get pregnant for 12 months, you might want to consider having an infertility evaluation or working with an infertility specialist. This is called a false-positive. In such a scenario, it is advised to retest for pregnancy after 7 days. It is rare, but certain conditions may result in a false-positive pregnancy test. GoodRx is not offering advice, recommending or endorsing any specific prescription drug, pharmacy or other information on the site. Antipsychotics often used to treat schizophrenia, such as perphenazine, prochlorperazine, Its possible to have a positive pregnancy test even if you arent technically pregnant. These include labetalol (Trandate), doxylamine (Unisom), and tramadol (Ultram). Patients in medical treatment for attention deficit/hyperactivity disorder (ADHD): Are they at risk in drug screening?. 10 Common Questions About Labor and Delivery. It may cause a false-positive reading on an at-home pregnancy test, particularly if the test is taken too early. She has worked with ground and helicopter ambulances (CCP-C, CFRN), ER, ICU, primary care, specialty care, psychiatric, and wilderness medicine. They are thought to be very common, but they typically go undetected if a pregnancy test isnt taken. The medication can cause a false-positive result if you take the test too soon after a missed period. Depending on your situation, it might be a relief to find out youre not pregnant. (1990). But research shows this isnt true. Find qualified telemedicine providers for a variety of symptoms and conditions.
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