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
- Abdominal pain, continuing or severe
- confusion or change in behavior
- convulsions (seizures)
- dark or bloody vomit
- 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
- increased urination
- trouble in sleeping
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