Phenaphen/Codeine #3 Oral

Phenaphen/Codeine #3 Oral Interactions

Your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with them first.

This drug should not be used with the following medication because very serious interactions may occur:

• naltrexone

If you are currently using this medication, tell your doctor or pharmacist before starting this drug.

Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription products you may use, especially of:

• other medications for pain
• cimetidine
• isoniazid
• anti-seizure drugs (e.g., carbamazepine, phenobarbital, phenytoin)
• anticholinergic drugs/antihistamines (e.g., hydroxyzine, oxybutynin, scopolamine)
• quinidine

Also report drugs that cause drowsiness such as: medicine for sleep (e.g., sedatives), tranquilizers, anti-anxiety drugs (e.g., diazepam), psychiatric medicines (e.g., phenothiazines such as chlorpromazine, or tricyclics such as amitriptyline), muscle relaxants, antihistamines that cause drowsiness (e.g., diphenhydramine).

Acetaminophen is an ingredient in many nonprescription products and in some combination prescription medications. Read the labels carefully before taking other pain relievers, fever reducers, or cold products to see if they also contain acetaminophen. Consult your pharmacist if you are uncertain if your other prescription or nonprescription products contain acetaminophen. (Also see adult maximum daily dose information in Side Effects section).

This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.

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