Do not exceed the recommended dosage. Stop use & consult a physician if the patient has a cough that persists for >1 wk, tends to recur or is accompanied by fever, rash or persistent headache. These could be signs of a serious condition. In case of accidental overdose, discontinue use & seek professional assistance immediately. Cough associated w/ smoking or chronic lung disease eg, asthma or emphysema. In case of accidental overdose, discontinue use & seek professional help immediately. Pregnancy & lactation.