OK, does menstrual blood flow affect blood tests for lipid panel , especially for bad cholesterol / LDL - levels? I recently read that Tylenol or any meds containing acetaminophen may give false results w/ higher elevations/ numbers of bad cholesterol. I m curious to know, since I ve taken Extra-Strength Tylenol for menstrual cramps/symptoms in the past, when ibuprofen (Advil, Motrin) is not available to me. Thank you for a prompt response !