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Optiflex-G Side Effects

Generic name: glucosamine

Note: This document contains side effect information about glucosamine. Some dosage forms listed on this page may not apply to the brand name Optiflex-G.

Applies to glucosamine: oral capsule, oral tablet.


Follow all directions on the product label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.

Get emergency medical help if you have any of these signs of an allergic reaction while taking glucosamine (the active ingredient contained in Optiflex-G) hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Common side effects may include:

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 glucosamine: compounding powder, oral capsule, oral tablet.


The manufacturer has not provided adverse event information.[Ref]


1. US National Library of Medicine (2021) Glucosamine Sulfate.

Further information

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.