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Gleolan Side Effects

Generic name: aminolevulinic acid

Medically reviewed by Last updated on Feb 18, 2022.

Note: This document contains side effect information about aminolevulinic acid. Some dosage forms listed on this page may not apply to the brand name Gleolan.

Applies to aminolevulinic acid: oral powder for reconstitution.

For 48 hours after taking aminolevulinic acid, you will need to protect your skin from light, both sunlight and bright indoor light.

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Your caregivers will watch you closely to make sure you do not have an allergic reaction, and to treat a reaction if it does occur.

Many side effects can occur up to 6 weeks after you took aminolevulinic acid (the active ingredient contained in Gleolan) Call your doctor at once if you have:

  • a light-headed feeling, like you might pass out;

  • skin redness or swelling, raised red areas;

  • skin rash, itching, or blistering;

  • a seizure;

  • chills; or

  • trouble speaking or understanding what is said to you.

Common side effects may include:

  • nausea, vomiting, diarrhea; or

  • abnormal liver function tests (for up to 6 weeks after taking aminolevulinic acid).

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.

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.