Community post

This was the most "reliable" response I could find in a quick search:

http://cranquis.tumblr.com/post/4217882850/hi-ive-always-had-add-and-was-finally-diagnosed

"I did a bunch of “drug information” reading on Adderall, since I had no idea about that “pregnancy test/Adderall” interaction before – I also spoke with my trusted pharmacist about it, and she did a search on Micromedex about it. We couldn’t find any data to back up that interaction claim (even though a Google search does lead to various non-medical forums such as WikiAnswers where people claim that Adderall DOES cause false-negative pregnancy tests– without giving any research to back up their claims). The drug info sheet says that “Adderall may interfere with urinary steroid determinations,” but since HCG is a protein and not a steroid, a urine pregnancy test (which checks for HCG, not for estrogen or progesterone which ARE steroids) should not be aff

Whoops! got cut off:

[continued]
should not be affected by Adderall. If you do a home urine pregnancy test at least 2 weeks after your missed period, if you do it properly following all the instructions, and it says negative, I think you can be 95%+ sure that you’re not pregnant.

Yes, that is all just about exactly what I found out. I'm not late yet, just getting these quirky half positives one day and negatives the next then back to half positive again.... I'll keep testing. Thanks for looking into it!