you wouldn't have a problem on a drug screening from taking the drugs you mentioned in the amounts you mentioned because they aren't related to narcotics. you could get a dui however or a driving under the influence charge if you drove erratically after taking too much cold medication and were caught by a cop. it would still be counted as being under the influence. but you'd have to be driving really badly and you'd have to fail the field sobriety test. moral? if you are woozy from cold meds stay home. it's safer anyway.
antistimines and dui. can you get a dui from taking an over the counter cold medicine which has chlorpheniramine/antihistamine 2 mgs in it a day or two before a drug urine test? it was only taken at night before bedtime. nothing at all was taken that day.