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What are the side effects of Alitretinoin?

Updated Sep 7, 20262 min readAnswer
On this pageShort answer Living with alitretinoin: what to watch for Common questions Related questions Sources
Short answer

Alitretinoin most often causes skin irritation at the application site when used as a gel, and headache, dry lips and skin, and cholesterol or thyroid changes when taken as capsules.

Which side effects you get depends on the form you use. Alitretinoin gel 0.1% is the version approved in the US, and it is applied to cutaneous Kaposi sarcoma lesions, so its effects stay mostly local: redness, itching, flaking, stinging, rash, and swelling on treated skin. Oral alitretinoin capsules are used in the UK and other countries for severe chronic hand eczema that has not responded to strong topical steroids, and their effects are body-wide, including headache in a large share of users plus changes in blood lipids and thyroid tests. Both forms are retinoids, so they can cause serious birth defects and are not used in pregnancy. Applying gel thinly to lesions only, using bland moisturizer and lip balm, avoiding sun and sunlamps, and keeping scheduled blood tests all make treatment easier to tolerate.

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Living with alitretinoin: what to watch for

1Apply the gel thinly:Cover only the lesions, let it dry, and keep it off healthy surrounding skin to limit irritation.
2Expect some early irritation:Mild redness and peeling often settle as treatment continues, but stop and check in if skin becomes raw or blistered.
3Protect treated skin:Use sun protection and skip sunlamps and tanning beds, since retinoids make skin more sensitive to light.
4Manage dryness:Use a plain moisturizer, lip balm, and preservative free eye drops if you are taking oral alitretinoin.
5Keep your blood tests:Oral alitretinoin needs monitoring of lipids, liver enzymes, and thyroid levels before and during treatment.
6Prevent pregnancy:Reliable contraception and pregnancy testing are required with oral retinoids, and anyone who could become pregnant should confirm the plan with a clinician first.

Common questions

What are the side effects of Alitretinoin?

Alitretinoin comes in two forms and the side effects differ. The gel applied to the skin, the form approved in the US for Kaposi sarcoma lesions, mostly causes local reactions: redness, itching, scaling, stinging, rash, and swelling where you apply it. Oral alitretinoin capsules, used outside the US for severe chronic hand eczema, commonly cause headache, dry lips, dry skin and eyes, muscle aches, and flushing, and can raise cholesterol and triglycerides or lower thyroid hormone levels on blood tests. Both forms are retinoids that can cause serious birth defects, so pregnancy must be avoided during and after treatment. Tell a clinician about severe or lasting headache, vision changes, or mood changes right away.

About this page. Written and maintained by the Pymander Health team. Last updated September 7, 2026.

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