STEVENS JOHNSON SYNDROME SYMPTOMS AND TREATMENT

What is Stevens Johnson Syndrome?

Stevens-Johnson Syndrome is a potentially deadly skin disease that usually results from a drug reaction. Another form of the disease is called Toxic Epidermal Necrolysis, and again this usually results from a drug-related reaction. Both forms of the disease can be deadly as well as very painful and distressing. In most cases, these disorders are caused by a reaction to a drug, and one drug that has come under fire lately is the cox-2 inhibitor Bextra, which is already linked to these disorders.

There are other drugs that have been linked to Stevens-Johnson Syndrome, and these include some other NSAIDS (non-steroid anti-inflammatory drugs), Allopurinol, Phenytoin, Carbamazepine, barbiturates, anticonvulsants, and sulfa antibiotics. The condition can sometimes – although not very often – be attributed to a bacterial infection, and in some cases there is no known cause for the onset of Stevens-Johnson Syndrome or Toxic Epidermal Necrolysis. However, the most common cause is through drug related reaction.

Stevens-Johnson Syndrome can affect any age group. However, it occurs most commonly in older people, and this could be because older people tend to use more of the drugs associated with the disease and are therefore collectively more at risk from the disease. People that have AIDS are also at an increased risk of contracting Stevens-Johnson Syndrome or Toxic Epidermal Necrolysis. Those in the higher risk groups are urged to remain vigilant for any signs of these skin diseases, and are also advised to remain well informed about the symptoms that could indicate the presence or onset of Stevens-Johnson Syndrome or Toxic Epidermal Necrolysis.

The symptoms :

Both Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis can start with non-specific symptoms such as cough, aching, headaches, and feverishness. This may be followed by a red rash across the face and the trunk of the body, which can continue to spread to other parts of the body. The rash can form into blisters, and these blisters can form in areas such as the eyes, mouth and vaginal area. The mucous membranes can become inflamed, and with Toxic Epidermal Necrolysis layers of the skin can also come away with ease and often the skin peels away in sheets. The hair and nails can also come away in some cases, and sufferers can become cold and feverish.

With Toxic Epidermal Necrolysis the most common cause of death is infection, which can enter through the exposed areas. This disease can leave the skin looking as though it has been burned, and areas where skin has flayed away can seep copiously and quickly become infected.

Treating these diseases:

Those suffering from SJS or TEN are treated in hospital, and if the cause of the problem is drug related then the drugs are stopped with immediate effect. Surviving patients are treated intravenously to replace any lost fluids, and the skin is left to re-grow on its own. However, the chances of survival can be hit and miss depending on the level of damage and the degree of infection incurred by the patient.

It is vital that those taking drugs that could result in these skin diseases are vigilant and can identify the danger signs associated with these problems. Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis can be deadly, and the earlier the symptoms are recognised the faster treatment can be initiated.

Of course, those affected by drugs in this way – or the families of those that have passed away from these skin problems – have every right to file for compensation against the manufacturer of the drug in question. Lawyers now specialize in this type of litigation, and those that feel as though they have grounds for compensation are advised to go through an experienced drugs litigation lawyer.

Stevens-Johnson syndrome is an immune-complex–mediated hypersensitivity disorder that may be caused by many drugs, viral infections, and malignancies. Cocaine recently has been added to the list of drugs capable of producing the syndrome. Additionally, the antidepressant mirtazapine and tumor necrosis factor (TNF) – alpha antagonists infliximab, etanercept, and adalimumab have been reported as causes. In up to half of cases, no specific etiology has been identified.

Although not currently relevant to the practice of emergency medicine, research into the pathophysiology of SJS/TEN may soon allow for the development of tests to aid in the diagnosis as well as to identify those at risk.

Pathologically, cell death results causing separation of the epidermis from the dermis. The death receptor, Fas, and its ligand, FasL, have been linked to the process, as has TNF-alpha. Researchers have found increased soluble FasL levels in the sera of patients with SJS/TEN before skin detachment or inset of mucosal lesions.

Others have also linked inflammatory cytokines to the pathogenesis.

A "killer effector molecule" has been identified that may play a role in the activation of cytotoxic lymphocytes.

There is also strong evidence for a genetic predisposition to severe cutaneous adverse drug reactions such as SJS. The US FDA and Health Canada advise screening for a human leukocyte antigen, HLA-B*1502, in patients of southeastern Asian ethnicity before starting treatment with carbamazepine. (The risk is much lower in other ethnic populations, making screening impractical in them). Another HLA antigen, HLA-B*5801, confers a risk of allopurinol-related reactions. Pretreatment screening is not readily available.