Biogen-Idec is a leading biotechnology company that is known for its innovative therapies for various medical conditions. The company was established in 2003 as the result of a merger between Biogen and IDEC Pharmaceuticals. A few years later, in 2008, the company decided to focus exclusively on biologics and became Biogen. Uses: Biogen-Idec produces and markets several drugs that are used to treat various medical conditions. One of its most significant products is Tecfidera (dimethyl fumarate), which is used to treat relapsing-remitting multiple sclerosis (MS). MS is an autoimmune disease that affects the central nervous system. Tecfidera helps to reduce symptoms such as fatigue, pain, and numbness by modulating the immune system's response. The drug is available in capsule form and is usually taken twice a day. Another drug produced by Biogen-Idec is Tysabri (natalizumab), which is used to treat Crohn's disease and multiple sclerosis. Tysabri works by binding to specific cells in the immune system and preventing them from entering the brain and spinal cord. This helps to reduce inflammation and damage caused by MS. Tysabri is typically administered through an intravenous infusion once every four weeks. Dosage: The dosage and administration of Biogen-Idec's drugs can vary depending on the condition being treated and the patient's medical history. For Tecfidera, the recommended dosage is 120mg taken twice a day with or without food. For Tysabri, the recommended dosage is an intravenous infusion of 300mg once every four weeks. Side Effects: Like all medications, Biogen-Idec's drugs can cause side effects, although not everyone experiences them. The side effects of Tecfidera can include flushing, diarrhea, stomach pain, and nausea. These side effects are usually mild and tend to improve over time. However, in some cases, Tecfidera can cause more severe side effects, including liver function abnormalities, decreased white blood cells, or severe allergic reactions. The side effects of Tysabri can include headache, fatigue, and nausea. However, Tysabri can also increase the risk of a rare but serious brain infection known as progressive multifocal leukoencephalopathy (PML). Other serious side effects of Tysabri can include liver damage, allergic reactions, and heart failure. Interactions: Biogen-Idec's drugs can interact with other medications, so it's essential to inform your healthcare provider of any drugs you're taking before starting treatment. Tecfidera can interact with certain medications, including those used to treat blood pressure, stomach acid, or gout. Tysabri can interact with other drugs that suppress the immune system, such as corticosteroids and immunosuppressants. It's essential to inform your healthcare provider of any medications you're taking before starting treatment with Tysabri. Generic: At present, there are no generic versions of Biogen-Idec's drugs available. However, when a drug's patent expires, other companies can begin manufacturing generic versions. This can help to reduce the cost of the drug and make it more accessible to patients. Demographic: Biogen-Idec's drugs are used to treat various medical conditions that can affect people of any age, gender, or race. However, the drugs are used primarily to treat multiple sclerosis and Crohn's disease, which tend to affect individuals in their twenties to fifties. It's essential to speak with your healthcare provider to determine if Biogen-Idec's drugs are right for your medical condition.