i was just gonna say that...and honestly...you can develop an allergy towards a drug at any given time...regardless of how many times you have taken it in the past. my daughter is allergic to amoxicillin..she had 2 days left to take it...but she broke out in a horrible rash...so no...if you are allergic to something...dont assume that symptoms will show within a few hours or so...it CAN take several days for reactions to occur.