What Medications Affect Phenergan?

What Medications Affect Phenergan? Phenergan may interact with cold or allergy medicine, sedatives, narcotics, sleeping pills, muscle relaxers, seizure medications, antidepressants, anxiety medicines, lithium, atropine, belladonna, benztropine, dimenhydrinate, methscopolamine, scopolamine, blood pressure medications, blood thinners, bronchodilators, … When should you not take Phenergan? Stop using Phenergan and call your doctor at once if you have