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Robitussin Ac

Last reviewed on RxList: 12/8/2004
Robitussin Ac Side Effects Center

Last reviewed on RxList 10/28/2016

Robitussin Ac (guaifenesin and codeine) is a combination of an expectorant and a narcotic used to treat cough and to reduce chest congestion caused by upper respiratory infections or the common cold. Robitussin Ac is available in generic form. Common side effects of Robitussin Ac include:

  • drowsiness,
  • dizziness,
  • lightheadedness,
  • headache,
  • facial flushing,
  • nausea,
  • vomiting,
  • upset stomach,
  • constipation,
  • skin rash,
  • itching, or
  • warmth, redness, or tingling under your skin.

Tell your doctor if you have serious side effects of Robitussin Ac including:

  • mental/mood changes (e.g., hallucinations),
  • fast or irregular heartbeat, or
  • trouble urinating.

Get medical help right away if you have a very serious side effect of Robitussin Ac such as seizure.

Take Robitussin Ac by mouth with or without food, usually every 4 to 6 hours as needed with a full glass of water or as directed by your doctor. Robitussin Ac may interact with cimetidine, quinidine, naloxone, naltrexone, or other medicines that make you sleepy (such as allergy medicine, narcotics, sleeping pills, muscle relaxers, and seizure medicine, depression, or anxiety). Tell your doctor all medications you use. During pregnancy, Robitussin Ac should be used only if prescribed. It is not recommended during the last 3 months of pregnancy due to increased risk for serious side effects in a newborn baby (e.g., withdrawal symptoms such as irritability, abnormal/persistent crying, diarrhea, seizures). Tell the doctor if you notice symptoms in your newborn. This medication passes into breast milk and could have undesirable effects on a nursing infant. Consult your doctor before breastfeeding. The codeine in this medication may be habit-forming, and you may have withdrawal symptoms if you suddenly stop taking it.

Our Robitussin Ac (guaifenesin and codeine) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Robitussin Ac Consumer Information

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

Stop taking this medication and call your doctor at once if you have any of these serious side effects:

  • severe dizziness or drowsiness;
  • confusion, hallucinations, unusual thoughts or behavior;
  • urinating less than usual or not at all; or
  • slow heart rate, weak pulse, fainting, weak or shallow breathing.

Less serious side effects include:

  • dizziness, drowsiness, headache;
  • warmth, redness, or tingling under your skin;
  • nausea, vomiting, upset stomach;
  • constipation; or
  • skin rash or itching.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the entire detailed patient monograph for Robitussin Ac (Guaifenesin and Codeine)

Robitussin Ac Professional Information
Related Resources for Robitussin Ac

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