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How soon after taking promethazine will my symptoms improve?

When promethazine is taken orally, effects become apparent within 20 minutes after the time of ingestion. Effects of the medication last for four to six hours and continue for up to 12 hours. Promethazine is efficiently absorbed through the gastrointestinal tract. Although promethazine quickly relieves symptoms of various conditions, the medication does not treat the underlying condition or improve the rate of recovery.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.