Hypersensitivity to other sympathomimetic drugs (eg, ephedrine, phenylpropanolamine, phenylephrine). Patients w/ severe high BP & who are receiving MAOI antidepressants. Immediately contact a physician if symptoms do not decrease w/in 3 days. Discontinue use in case of trouble sleeping, heart palpitations & dizziness. Cough accompanied by fever, redness of the skin, or persistent headache. Continuous & long-term cough (especially in patients w/ asthma, emphysema) & cough w/ excessive phlegm. Patients w/ glaucoma, prostate hypertrophy, epilepsy, hyperthyroidism & urinary retention, heart problems, DM, arrhythmias, asthma, bronchitis & pheochromocytoma. Hypoxia (lack of oxygen). May cause resp & CNS depression w/ large doses or in patients w/ impaired resp function (eg, asthma, emphysema). Avoid concurrent use w/ other cold & cough medicines, antihistamines, appetite suppressants, drugs containing amphetamines & CNS suppressants. Should not exceed the recommended dosage. Impaired liver & kidney function. Pregnant & lactating women. Overwt or elderly. Childn <6 yr.