Tamiflu (Oseltamivir) 75mg Capsules over the Counter
What Is Oseltamivir Phosphate?
Tamiflu is an antiviral drug used in the prophylaxis (prevention of disease) and treatment of influenza (commonly known as “flu”). It works against both influenza A and influenza B. Patients suffering from H1N1 swine flu, a subtype of influenza A virus, can also take Tamiflu to reduce the symptoms. In adults, children, and infants older than 2 weeks who are experiencing symptoms of flu (such as a stuffy nose, sore throat, fever/chills), this drug can help alleviate the symptoms; it works best if taken within 2 days of getting the flu. Tamiflu can also be used to prevent influenza if taken after exposure to somebody else who has contracted it (such as a sick family member) or if there is a flu outbreak. However, Tamiflu should not be considered a substitute for a flu vaccine shot.
The active ingredient of Tamiflu is oseltamivir phosphate. It is also sold in its generic form. Oseltamivir belongs to a drug class known as neuraminidase inhibitors. It binds to the protein neuraminidase which is required for replication of the flu virus. By preventing replication of the virus, oseltamivir shortens the duration and reduces the severity of the symptoms of flu.
Tamiflu was first discovered by Gilead Sciences and is currently manufactured by Hoffmann-La Roche, a Swiss pharmaceutical company. It is available both as capsules and as an oral suspension. There are three strengths of Tamiflu capsules: 30 mg, 45 mg, and 75 mg. Tamiflu 30 mg capsules have a light-yellow opaque body with a light-yellow cap while the 45 mg hard capsules have a grey-colored body with a grey opaque cap. The 75 mg capsules have a grey body with a yellow cap. The body of all three forms bears the word “Roche”, while the caps are imprinted with “30 mg”, “45 mg” and “75 mg” respectively. The powder for oral suspension has a concentration of 6 mg/mL when constituted with water as directed.
In adults and children, Tamiflu 75 mg is typically taken twice a day (morning and night) for 5 days when used in the treatment of flu. When used for prophylaxis, this drug is usually taken once a day. It can be taken with or without food, but taking it with food or milk helps prevent stomach upset. Tamiflu capsules can also be opened and mixed with sweetened liquids to make intake easier for individuals unable to take capsules.
Oseltamivir Side Effects
Some of the most common adverse effects experienced after taking Tamiflu are:
- Nausea/vomiting
- Stomach pain
- Headache
- Diarrhea
Although rare, some individuals may experience serious side effects after taking Tamiflu. These side effects include:
- Hallucinations
- Sudden confusion
- Behavioral changes
- Tremors
An allergic reaction to Tamiflu is uncommon but may still occur. Symptoms of an allergic reaction include rashes, itching, swelling of the throat, tongue, or face, dizziness, and trouble breathing or swallowing. In case of serious side effects or an allergic reaction, immediate medical attention should be sought.
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