What should I watch for?
Visit your doctor or health care professional for regular checks on your progress. You may see an improvement in your condition after a few weeks. The full effect can take 6 to 9 months of treatment. This medicine and PUVA can increase your risk of getting skin cancer. Show your doctor or health care professional any unusual sores or blemishes that develop. If your skin gets very dry, ask your doctor or health care professional before you use any skin products.
This medicine can increase sensitivity of the skin to sun or UV light. This could lead to a serious burn. Keep out of the sun for at least 24 hours before and 48 hours after PUVA. Keep out of the sun for 12 to 48 hours after application of this medicine. If you must be outside, wear protective clothing and use a sunscreen (at least SPF 15). Do not apply sunscreen to areas of psoriasis until after light therapy. Do not use sun lamps, sun tanning beds or booths. Certain foods can increase your sensitivity to sunlight while using this medicine. Avoid eating limes, figs, parsley, parsnips, mustard, carrots, and celery while using this medicine.
You can get permanent premature aging of the skin if you use this medicine for a long time. This effect is similar to the result of too much sunbathing.
Recent treatment with radiation therapy or cancer medicines increases the chance of developing side effects from combined light treatment and this medicine.
Interactions with Medications
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Blistering and peeling of skin
reddened, sore skin
swelling, especially of the feet or lower legs
There is an increased risk of developing skin cancer after use of methoxsalen. You should check the treated areas of your body regularly and show your doctor any skin sores that do not heal, new skin growths, and skin growths that have changed in the way they look or feel.
Premature aging of the skin may occur as a result of prolonged methoxsalen therapy. This effect is permanent and is similar to the result of sunbathing for long periods of time.
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.