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What is the most important information I should know about aminolevulinic acid?

Only a qualified doctor or other healthcare professional should apply aminolevulinic acid. Aminolevulinic acid is not intended for application by the patient.

After aminolevulinic acid has been applied, wear sunlight-protective clothing such as a wide-brimmed hat or similar head covering. Sunscreens will not protect you. Avoid exposure to sunlight or bright indoor light (examination lamps, operating room lamps, tanning beds, or very close lights). If you experience stinging or burning of the treated skin, reduce your exposure to light. It has not been determined if perspiration can spread aminolevulinic acid outside the treatment site to the eyes or surrounding skin.

What is aminolevulinic acid?

Aminolevulinic acid causes skin cells to become much more sensitive to certain types of light. Skin cells treated with aminolevulinic acid and exposed to a special light die and then slough off.

Aminolevulinic acid is used to treat warty overgrowths of skin (actinic keratoses) on sun-exposed areas of the face and scalp. Treatment involves application of aminolevulinic acid, followed 14 to 18 hours later by exposure to a special blue light.

Aminolevulinic acid may also be used for purposes other than those listed in this medication guide.

Who should not use aminolevulinic acid?

Before using aminolevulinic acid, tell your doctor if you have

• porphyria, or

• a bleeding or blood clotting disorder.

You may not be able to use aminolevulinic acid, or you may require a dosage adjustment or special monitoring during your treatment.

Aminolevulinic acid is the FDA pregnancy category C. This means that it is not known whether aminolevulinic acid will harm an unborn baby. Do not use aminolevulinic acid without first talking to your doctor if you are pregnant. It is unknown whether aminolevulinic acid passes into breast milk. Do not use aminolevulinic acid without first talking to your doctor if you are breast feeding a baby.