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Answers from the BJC Experts

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Can I take promethazine for nausea if I have type 1 diabetes?

From Ask the Pharmacist

Promethazine (Phenergan) is in the phenothiazine drug class. Promethazine has many indications or uses including anti-nausea vomiting, motion sickness and itching. Drugs in the phenothiazine class have been reported to increase blood sugar. Since promethazine is a phenothiazine antihistamine, patients with diabetes mellitus should routinely monitor their blood glucose during any phenothiazine therapy. This drug may also cause extreme drowsiness. Be careful taking this if you must be alert. Be sure that all of your health care providers have a current list of your medications, allergies and medical conditions.

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