USES: Promethazine is used to prevent nausea and vomiting. It is also used for sedation, allergy symptoms (runny nose, itchy eyes) and motion sickness (prevention and treatment). Use is not recommended in children less than 2 years old.
SIDE EFFECTS: Constipation, drowsiness, vision changes or dry mouth may occur. If any of these effects persist or worsen, notify your doctor. Unlikely to occur but report promptly: restlessness, muscle stiffness, weakness, difficulty speaking, loss of balance, mask- like facial expression, trembling or shaking, dizziness, lip smacking or other uncontrollable movements, difficulty urinating, skin rash/discoloration. Very unlikely to occur but report promptly: persistent sore throat or fever, unusual bleeding or bruising, stomach pain, yellowing of eyes or skin, dark urine, hot dry skin, vomiting. This drug may infrequently cause a very serious (rarely fatal) nervous system disorder (neuroleptic malignant syndrome).
Excessive sedation may occur when promethazine is combined with other medications that depress the central nervous system (brain) and cause sedation. Such drugs include ethanol, barbiturates, anti-anxiety medications, sedatives, other phenothiazines, and narcotic pain medications.
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