Mild psoriasis which has not responded to simple treatments or psoriasis which affects more than 20% of the body..
Signs and Symptoms
Some individuals may also experience arthritis which can resemble rheumatoid arthritis. The joints become stiff after resting, especially after a nights sleep. There may be inflammation of the muscles and tendons around the elbows, wrists and heels. Joints may lose their range of movement and become deformed or locked.
Complications of the Disorder
If severe widespread sterile pustules develop (pustular psoriasis) then again this potentially can be life threatening.
The main complication is the social embarrassment associated with any visible skin disease.
UVA represents the longer wavelengths of ultraviolet light. UVA is similar to sun bed wavelengths and higher levels of UVA are available from special machines compared to the amount of low background UVA that is available from the suns rays.
The combination of psoralens and UVA helps to slow down the rate of cell division in the skin affected with psoriasis. PUVA machines are usually available in dermatology hospital departments. They are large boxes similar to shower cabinets where an individual has to stand exposed to the ultraviolet light for a determined period of time. Treatment may be required 2 or 3 times a week over a minimum period of 2 months.
Bath PUVA involves immersing in a bath containing psoralens prior to exposure to ultraviolet light. This appears to give equally effective results although it does require a longer period of attendance at hospital prior to ultraviolet light exposure. This can be of benefit for patients who feel nauseous with psoralens taken by mouth. In addition it is recommended that when patients take psoralens by mouth that Polaroid type sunglasses are worn for 24 hours afterwards to help prevent potential cataract development.
Narrow band UVB involves again standing inside an appropriate cabinet for a predetermined period of time. No drug therapy however is required in association with this.
The main concern with phototherapy is the potential of ultraviolet light to damage the skin in the long term and therefore this treatment is used for limited courses rather than as an ongoing treatment for persistent disease. PUVA treatment has now been available for almost 30 years and skin cancer risks are increased if ultraviolet light exposure has been significant. Psoralens as a drug appears to be well tolerated and relatively safe. Effects on pregnancy are unknown and therefore efficient contraception should be ensured by females of child-bearing potential.
Side effects with Neotigason are common. Dryness of the lips, eyes, face and occasional nose bleeds are commonly experienced but usually relieved by moisturizers and lip salves.
Hair loss may occur in some individuals which is reversible on discontinuation of treatment.
Muscle aches and pains relieved by avoiding vigorous exercise and by anti-inflammatories such as paracetamol may be encountered. Headaches usually relieved by paracetamol can occur and may not settle until therapy is discontinued.
Ongoing treatment with Neotigason may affect the levels of fats in the blood and a regular check is required on this. If long term treatment is required changes on the bones close to the joints may occur and therefore X-rays may be required every couple of years.
Methotrexate is usually taken by mouth as a single weekly dose. Although Methotrexate has been used in the treatment of severe psoriasis for more than 30 years it can have some adverse side effects. It can cause anaemia, increasing the risk to infections and can cause excessive bleeding and bruising. Therefore when taking Methotrexate regular blood tests are required at the start of treatment (i.e. weekly) and less often as time goes on (perhaps every 2 to 3 months). Methotrexate can also damage the liver but usually only after many years of continuous treatment. It may therefore be necessary to monitor the liver with regular blood tests, ultrasounds or liver biopsies. The risk of damaging the liver is greatly increased by alcohol and therefore alcohol consumption whilst on Methotrexate should be discouraged. Methotrexate affects the male and female sexual reproductive organs and therefore you should not become pregnant or father a child whilst on Methotrexate.
It is either taken in the form of capsules or as a solution by mouth. The most common side effect is nausea and indigestion. These can usually be treated without stopping the Cyclosporin. Cyclosporin can however damage kidneys and cause high blood pressure. Therefore monitoring of kidney function with blood tests and urine collections are required, as well as regular monitoring of blood pressure.
Although Hydroxyurea has been used in the treatment of psoriasis for more than 30 years again it can occasionally have adverse side effects. It can make patients anaemic, prone to infections and cause excessive bleeding. For this reason whilst you are having Hydroxyurea you will require regular blood checks, initially weekly and then less often perhaps every 2 months once under control. Adequate contraception is essential whilst on Hydroxyurea and for 2 months after discontinuing treatment. You must not father a child for the time of the treatment period. If there has been no response within 6 weeks alternative treatments may have to be considered. Most people requiring Hydroxyurea require at least 6 months of treatment before deciding to stop treatment.
A period of in-patient treatment with bed rest may occasionally be required for severe psoriasis, particularly if it involves total body skin (erythroderma) or if there is extensive pustular involvement which may be life threatening