Take Phenergan exactly as prescribed by your doctor. Follow all directions on your prescription label. Your doctor may occasionally change your dose to make sure you get the best results. Do not take this medicine in larger or smaller amounts or for longer than recommended.
Phenergan is often taken at bedtime or before meals. For motion sickness, Phenergan is usually started within 1 hour before traveling. When used for surgery, Phenergan is usually taken the night before the surgery.
How often you take Phenergan and the timing of your dose will depend on the condition being treated.
Measure liquid medicine with the dosing syringe provided, or with a special dose-measuring spoon or medicine cup. If you do not have a dose-measuring device, ask your pharmacist for one.
If a child is using this medicine, tell your doctor if the child has any changes in weight. Phenergan doses are based on weight in children, and any changes may affect your child's dose.
Call your doctor if your symptoms do not improve, or if they get worse while using Phenergan.
This medicine can cause unusual results with certain medical tests. Tell any doctor who treats you that you are using Phenergan.
Store Phenergan at room temperature away from moisture, heat, and light.
 Detailed Phenergan dosage information
What happens if I miss a dose?
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
Overdose symptoms may include overactive reflexes, loss of coordination, severe drowsiness or weakness, fainting, dilated pupils, weak or shallow breathing, or seizure (convulsions).
