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Theomar GG Side Effects

Generic Name: guaifenesin / theophylline

Note: This page contains side effects data for the generic drug guaifenesin / theophylline. It is possible that some of the dosage forms included below may not apply to the brand name Theomar GG.

Applies to guaifenesin / theophylline: oral capsule, oral capsule liquid filled, oral elixir, oral liquid, oral syrup, oral tablet

As well as its needed effects, guaifenesin / theophylline may cause unwanted side effects that require medical attention.

Severity: Moderate

If any of the following side effects occur while taking guaifenesin / theophylline, check with your doctor or nurse as soon as possible:

Less common or rare:
  • Heartburn and/or vomiting
Symptoms of toxicity
  • Abdominal pain, continuing or severe
  • confusion or change in behavior
  • convulsions (seizures)
  • dark or bloody vomit
  • diarrhea
  • dizziness or lightheadedness
  • fast and/or irregular heartbeat, continuing
  • nervousness or restlessness, continuing
  • trembling, continuing

Minor Side Effects

Some guaifenesin / theophylline side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

Less common:
  • Fast heartbeat
  • headache
  • increased urination
  • nausea
  • nervousness
  • trembling
  • trouble in sleeping

It is possible that some side effects of Theomar GG may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

More about Theomar GG (guaifenesin / theophylline)

Consumer resources

Other brands: Ed-Bron G, Elixophyllin GG

Related treatment guides

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