Entuss Side Effects

Generic name: guaifenesin / hydrocodone

Note: This document contains side effect information about guaifenesin / hydrocodone. Some of the dosage forms listed on this page may not apply to the brand name Entuss.

Some side effects of Entuss may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.

For the Consumer

Applies to guaifenesin / hydrocodone: oral capsule, oral liquid, oral syrup, oral tablet, oral tablet extended release

Get emergency medical help if you have any of these signs of an allergic reaction while taking guaifenesin / hydrocodone: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop using this medication and call your doctor at once if you have a serious side effect such as:

• slow heart rate, weak or shallow breathing;

• feeling like you might pass out;

• confusion, fear, unusual thoughts or behavior;

• seizure (convulsions); or

• urinating less than usual or not at all.

Less serious side effects of guaifenesin / hydrocodone may include:

• dizziness, drowsiness;

• nausea, vomiting, upset stomach;

• blurred vision;

• constipation;

• dry mouth; or

• sweating.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.

For Healthcare Professionals

Applies to guaifenesin / hydrocodone: oral capsule, oral liquid, oral syrup, oral tablet, oral tablet extended release

Nervous system

One study has suggested that the respiratory depression caused by hydrocodone may be of benefit in the treatment of dyspnea related to chronic obstructive pulmonary disease and restrictive lung disease. However, the potential for the precipitation of respiratory insufficiency makes such use of hydrocodone hazardous and such use should be undertaken, if at all, only with extreme caution.

Nervous system side effects of guaifenesin have included dizziness and headache. Central nervous system adverse effects of hydrocodone have included mental depression, dizziness, lightheadedness, respiratory depression (which is sometimes fatal), stupor, delirium, somnolence, agitation, and dysphoria.

Other

Other side effects of hydrocodone have included withdrawal symptoms, such as agitation, restlessness, anxiety, insomnia, tremor, abdominal cramps, blurred vision, vomiting and sweating, after either abrupt cessation or fast tapering of narcotic analgesics.

Gastrointestinal

Gastrointestinal side effects of guaifenesin have included upset stomach and vomiting with higher than recommended doses. Doses recommended for expectoration are rarely associated with gastrointestinal upset. Gastrointestinal side effects of hydrocodone have included nausea, vomiting, constipation, and dry mouth.

Genitourinary

Genitourinary side effects of hydrocodone have included ureteral spasm, spasm of vesicle sphincters, and urinary retention.

Dermatologic

Dermatologic side effects of guaifenesin have included rash. Narcotic-induced rash has also been reported.

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