Note: This document contains side effect information about dyphylline / guaifenesin. Some dosage forms listed on this page may not apply to the brand name Jay-Phyl.
Applies to dyphylline / guaifenesin: oral liquid, oral syrup, oral tablet.
Warning
Dyphylline and guaifenesin should not be given to a child younger than 6 years old.
Get emergency medical help if you have any of these signs of an allergic reaction while taking dyphylline / guaifenesin: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
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pounding heartbeats or fluttering in your chest;
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rapid breathing, feeling short of breath;
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seizure (convulsions); or
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coughing up blood or vomit that looks like coffee grounds.
Common side effects may include:
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nausea, vomiting, stomach pain, diarrhea;
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headache;
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feeling restless or irritable;
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sleep problems (insomnia); or
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flushing (warmth, redness, or tingly feeling).
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 dyphylline / guaifenesin: oral capsule, oral liquid, oral syrup, oral tablet.
Cardiovascular
Frequency not reported: Cardiac palpitation[Ref]
Nervous system
Frequency not reported: Headache, CNS stimulation[Ref]
Gastrointestinal
Frequency not reported: Nausea[Ref]
