I have a terrible cough and cold. Can I take Tylenol Cold & Flu? Active ingredients - 325 mg Acetaminophen, 10 mg Dextromethorphan HBr, 200 mg Guaifenesin, and 5 mg Phenylephrine HCI. I don't want to do anything to jeopardize my supply. I'm not sure who to call to ask this question...my OB? Primary Care? Pharmacist? Thanks!