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Phenergan 50 mg

Phenergan® (promethazine hydrochloride) comes in many different forms and strengths, including:
  • Promethazine 12.5 mg tablets and rectal suppositories
  • Promethazine 25 mg tablets and rectal suppositories
  • Promethazine 50 mg tablets and rectal suppositories
  • Promethazine 6.25 mg per 5 mL syrup
  • Phenergan 25 mg per mL injection vials and ampuls (1 mL)
  • Phenergan 50 mg per mL injection vials and ampuls (1 mL).
Typically, a Phenergan dose of 12.5 to 25 mg (in tablet, rectal suppository, or syrup form) will produce sedation in children. Adults, however, usually require a higher amount (up to 50 mg of Phenergan).
The standard recommended dosage of Phenergan for treating allergies is 25 mg before bedtime. If necessary, smaller, more frequent doses can be given.
Motion Sickness
The recommended amount for treating motion sickness in adults is 25 mg twice daily. A similar dosing regimen is recommended for children, except with a lower dose of Phenergan (12.5 to 25 mg twice daily).
Nausea and Vomiting
A typical Phenergan dose for treating nausea and vomiting in adults is 12.5 to 25 mg every four to six hours as needed. For children, the healthcare provider will calculate the amount based on your child's weight.
(Click Phenergan Dosage for more information on dosing guidelines, how to safely use the injectable form of this medication, and what your healthcare provider will consider before making dosage recommendations.)
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