Use caution when driving, operating machinery, or performing other hazardous activities. Codeine, phenylephrine, and promethazine may cause dizziness or drowsiness. If you experience dizziness or drowsiness, avoid these activities. Use alcohol cautiously. Alcohol may increase drowsiness and dizziness while you are taking codeine, phenylephrine, and promethazine.
Codeine is a narcotic.
It is a pain reliever and a cough suppressant. Phenylephrine is a decongestant. Constriction of blood vessels in your sinuses and nose decreases congestion. Promethazine is an antihistamine. It blocks the effects of the naturally occurring chemical histamine in your body.