Inform your doctor about all the medications you may use (both prescription and nonprescription), especially of: anti-depressant/anti-anxiety drugs, sparfloxacin, grepafloxacin, guanethidine, guanadrel, metrizamide, cabergoline, lithium, narcotic pain medications (e.g., codeine), drugs used to aid sleep, drowsiness-causing antihistamines (e.g., diphenhydramine), other medicines that make you drowsy. Many cough-and-cold products contain ingredients that may add a drowsiness effect. Before you use cough-and-cold medications, ask your doctor or pharmacist about the safe use of those products. Do not start or stop any medicine without doctor or pharmacist approval.
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