Interferon alpha, like all interferons has a variable and broad-spectrum antiviral effects.
Interferons appear to be effective at slowing the replication of almost any human virus.
However, its clinical efficacy is decreased by the serious side effects. For example, while INF-Alpha may be effective at stopping the symptoms of the common cold this treatment is not practical since the side effects are generally more disturbing than an average cold infection. The side effects include an immediate influenza-like syndrome with fatigue, fever, chills, headache, anorexia, myalgia, arthralgia, nausea, vomiting, diarrhea, and diaphoresis. Prolonged therapy can lead to myelosuppression, hepatitis, nuerotoxicity, depression, ataxia, tremor, seizures, sedation, coma, cardiac toxicity neurasthenia, and chronic fatigue. Interferon Alpha is a substance produced naturally by virally infected macrophages.