Medicines you put on your skin (topical medicines)
Treatment using more than one topical medicine is often done. This can help prevent side effects from some of the stronger medicines. For example, you may use one medicine during the week but another on the weekend.
For mild psoriasis, you may be able to control psoriasis using an over-the-counter medicine, including corticosteroid creams. Be safe with medicines. Read and follow all instructions on the label.
For moderate to severe psoriasis, you may need to use a topical medicine prescribed by your doctor, such as a corticosteroid or a medicine related to vitamin D called calcipotriene. Other topical medicines include anthralin and tars.
Your doctor may have you use occlusion therapy. This means wrapping the skin after applying moisturizers or medicated creams or gels. The wrap can be fabric or plastic. Occlusion keeps the area moist and can make the medicated creams work better. Steroid cream may be used with the occlusion treatment method for small areas, but not for more than a few days. Occlusion of large areas may cause side effects such as thinning of the skin. Talk to your doctor before using occlusion therapy, to make sure that you do it safely.
Psoriasis causes red, scaly patches to appear on the skin. It can look like a rash, so you may worry that you could get it from someone else or pass it to others. But rest easy: It's not contagious. You cannot catch the disease by touching someone who has it.
Medicines taken by mouth (oral medicines) may be used to treat moderate to severe psoriasis.
Sometimes this type of medicine is given as shots instead of pills.
Medicines called biologics may be used to treat severe psoriasis or psoriasis that hasn't improved after other treatments. Biologics are similar to or the same as proteins made by the body. These medicines block the harmful response of the body's immune system that causes the symptoms of psoriasis.
These medicines are given through a needle (IV). Early clinical trials of biologic therapies for moderate to severe psoriasis have produced promising results. But the medicines are expensive, and long-term effects aren't known. Biologics may increase the long-term risk of cancer or infections.4
Over-the-counter topical medicines
There are many types of nonprescription products, including corticosteroid creams, for psoriasis. Examples of their active ingredients include:
Salicylic acid, found in products such as Psoriasin Body Wash and Dermasolve e70.
Coal tar, found in products such as Elta Tar and Neutrogena T/Gel.
Zinc pyrithione, found in products such as SkinCure and Derma-Cap. These are new products that come in spray, soap, or solution form.
These products are used to treat small patches of psoriasis and symptoms, including itching, redness, flaking, and scaling of the skin and scalp. For some people, they may eliminate scales and sores caused by psoriasis.