Jay-Phyl Side Effects
Generic name: dyphylline / guaifenesin
Medically reviewed by Drugs.com. Last updated on May 7, 2022.
Note: This document contains side effect information about dyphylline / guaifenesin. Some of the dosage forms listed on this page may not apply to the brand name Jay-Phyl.
For the Consumer
Applies to dyphylline/guaifenesin: oral liquid, oral syrup, oral tablet
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:
pounding heartbeats or fluttering in your chest;
rapid breathing, feeling short of breath;
seizure (convulsions); or
coughing up blood or vomit that looks like coffee grounds.
Common side effects may include:
feeling restless or irritable;
sleep problems (insomnia); or
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
Frequency not reported: Cardiac palpitation[Ref]
Frequency not reported: Headache, CNS stimulation[Ref]
Frequency not reported: Nausea[Ref]
More about Jay-Phyl (dyphylline / guaifenesin)
- Drug interactions
- Dosage information
- During pregnancy
- En español
- Drug class: antiasthmatic combinations
Related treatment guides
1. "Product Information. Difil G (dyphylline-guaifenesin)." SJ Pharmaceuticals LLC (2004):
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Some side effects may not be reported. You may report them to the FDA.