Promethazine with Codeine - Would promethazine with out the codeine work as well for a cough?

Promethazine hydrochloride is a prescription medication licensed for a wide variety of different purposes. These promethazine uses include:

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Treating the following conditions: Perennial (year-round) or seasonal allergies; Nonallergic nasal symptoms due to irritants; "Allergy eyes" (allergic conjunctivitis); Hives; Allergic reactions to blood or plasma transfusions; Severe, anaphylactic allergic reactions (when used with other medications); Treating or preventing nausea and vomiting related to surgery and general anesthesia; Treating or preventing motion sickness; Causing sedation in the following situations: Before or after surgery; During labor; In situations when mild anxiety relief and light sleep is desired.

Promethazine is also approved to be used in combination with pain relievers for post-surgical pain.

It should be noted that this article applies only to products that contain just promethazine as the active ingredient. It perhaps without codeine would not treat cough.

However, please do seek medical advice, take care, best wishes!