How many 500mg Tylenol pills would it take to relieve a headache?

Im not sure how many it takes to od, but i have taken up to 18 pills of 500 mg of Tylenol in less then 5 minutes and not feel any effects.

To equal the Tylenol level would be one 500mg Tylenol, however, 3's have codiene in them and no matter how many tylenols you take, it will not give you the effect of an opiate. If you take too many...

birth control pills do not normally effect the fetus unless it is very long term when prego. it is just strongly advised not to take them so it doesnt harm the development of the baby.

No. But three or four will if the pill contains Acetaminophen.

If you are in school, this is a question for your school counselor. If you are not in school, you need to contact a doctor.