Drugs while pregnant
An_247664 posted:
I havent had a period in over a month and i have taken two test and they both came back negative. my friend told me that certain drugs can cause a false negative. is that true? if yes, which ones?
tlkittycat1968 responded:
There are only two things that can cause a false negative: testing too soon and just not showing on a test (some women don't show on pregancy tests for whatever reason).

If you miss a second period and are still getting negative test results, see a doctor.