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Important Note

The following information is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. Consult your healthcare professional before using this drug.


(gweye-FEN-eh-sin WITH KO-deen)

COMMON BRAND NAME(S): Cheracol, Robitussin A-C


Guaifenesin is an expectorant used to help clear mucous and congestion. Codeine is used to quiet a cough. This combination medication is used to control cough and congestion associated with a cold, allergies or respiratory tract illness.

How To Use

Take this medication with food if stomach upset occurs. Take this medication as directed. Do not increase the dose or take it more often or longer than prescribed. This is a strong cough medication and must only be used for the condition and by the person for which it is prescribed. It should not be used for just any cough. It is helpful to drink plenty of fluids (6-8 glasses a day) to help relieve congestion.

Side Effects

Drowsiness, constipation, stomach upset, nausea, vomiting, dizziness or headache may occur the first several days as your body adjusts to the medication. If these effects continue or become bothersome, inform your doctor. Notify your doctor if you develop: a skin rash, itching, rapid heart rate. If you notice other effects not listed above, contact your doctor or pharmacist.


Tell your doctor your medical history, especially of: lung disease (e.g., asthma, emphysema), substance abuse, allergies (especially to narcotics). Because this medication can cause dizziness, use caution performing tasks requiring alertness and avoid consuming alcohol. This drug should be used only if clearly needed during pregnancy. Since it is not known if this medication is found in breast milk; consult your doctor before breast-feeding.

Drug Interactions

Tell your doctor of any over-the-counter or prescription medication you may take, including: sedatives, tranquilizers, narcotic pain relievers, sleeping pills, seizure medication, muscle relaxants, medications for depression, cimetidine, quinidine. Do not start or stop any medicine without doctor or pharmacist approval.


If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include slowed breathing, drowsiness, deep sleep or loss of consciousness, cold and clammy skin, dry mouth, and slow pulse.


Do not share this product with others.

Missed Dose

If you miss a dose, take it as soon as remembered; do not take if it is almost time for the next dose, instead, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the doses.


Store at room temperature between 59 and 86 degrees F (between 15 and 30 degrees C) away from moisture and heat. Do not store in the bathroom.