Quibron 300 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 Quibron 300.

It is possible that some side effects of Quibron 300 may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

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.

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

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

More about Quibron 300 (guaifenesin / theophylline)

Consumer resources

Other formulations

Related treatment guides

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

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