Always consult your pediatrician before administering Phenergan to a child or infant. Dosage is determined by the child’s weight and the specific condition being treated. Never exceed the recommended dose.
Oral Phenergan (Promethazine Hydrochloride)
For children, the typical dosage is 0.5 to 1 mg per kilogram of body weight every 4 to 6 hours, as needed for nausea and vomiting. The maximum daily dose should not exceed 5 mg per kg. For infants, the recommended dose is considerably lower and should be determined only by a doctor. For example, a 10 kg child might receive 5-10 mg every 4-6 hours, while a much smaller infant would require a significantly reduced dose.
Rectal Phenergan
Rectal administration is sometimes used for children who cannot take oral medication. The dosage is similar to the oral route, but the preparation and administration should be carefully overseen by a healthcare professional. Again, infant dosage differs significantly from that of older children.
Note: This information is for guidance only. Accurate dosage depends on individual circumstances. Precise instructions must come directly from your child’s physician.
Important Safety Information
Side effects can include drowsiness, dry mouth, and constipation. Serious side effects are rare but possible. Always monitor your child carefully after administering Phenergan. If you observe any unusual reactions, contact your doctor immediately. Never give Phenergan to a child or infant without a doctor’s prescription.


