Oseltamivir 75 mg

Description

Oseltamivir 75 mg Capsules – Powerful Antiviral for Influenza Treatment & Prevention
What is Oseltamivir 75 mg?
Oseltamivir 75 mg is an oral antiviral medication primarily used for the treatment and prevention of influenza A and B viruses. Marketed under various brand names including Tamiflu, it belongs to the neuraminidase inhibitor class of drugs, which work by stopping the flu virus from spreading in the body. It is especially effective when administered within the first 48 hours of flu symptoms.
Composition
Active Ingredient: Oseltamivir Phosphate equivalent to Oseltamivir 75 mg
Form: Hard gelatin capsule
Color: Usually yellow or light-colored (varies by brand)
Mechanism of Action
Oseltamivir inhibits the action of neuraminidase, an enzyme that allows the influenza virus to replicate and spread between cells. By blocking this enzyme, the drug:
Reduces viral spread
Lessens the severity and duration of symptoms
Helps prevent complications like bronchitis or pneumonia
Indications
Treatment of InfluenzaFor patients aged 2 weeks and older with acute, uncomplicated flu symptoms
Most effective when started within 48 hours of symptom onset
Prevention (Prophylaxis) of InfluenzaFor people exposed to the virus (e.g., family members, healthcare workers)
Recommended for high-risk groups: elderly, immunocompromised, unvaccinated
Dosage & Administration
Treatment of Influenza
Adults & Adolescents (13 years and older):→ 75 mg twice daily for 5 days
Children (1 to 12 years):→ Dose adjusted by weight (consult pediatric dosing guide)
Infants (2 weeks to <1 year):→ 3 mg/kg twice daily for 5 days (as prescribed)
Prevention of Influenza
Adults & Adolescents:→ 75 mg once daily for at least 10 days after exposure
Children:→ Dose adjusted by weight and duration based on risk level
Note: Capsules can be taken with or without food. Taking with food may reduce the chance of stomach upset.
Benefits
Shortens flu duration by 1–2 days when started early
Reduces severity of symptoms such as fever, chills, sore throat, cough, and body aches
Helps prevent serious flu-related complications
Effective as a preventive measure during community outbreaks or close contact with infected individuals
Side Effects
Common (usually mild and temporary):
Nausea
Vomiting
Headache
Abdominal pain
Fatigue
Less Common but Serious:
Allergic reactions (rash, swelling, difficulty breathing)
Neuropsychiatric events (hallucinations, confusion, delirium—more common in children)
Skin reactions like Stevens-Johnson Syndrome (rare)
Warnings & Precautions
Should not be used for illnesses caused by viruses other than influenza
Start treatment within 48 hours of flu symptom onset for best effectiveness
Use with caution in patients with:Kidney impairment (dose adjustment may be needed)Heart conditions
Liver disease
Not a substitute for seasonal flu vaccination
Safety in long-term use (more than 6 weeks) is not established
Drug Interactions
Oseltamivir has a low potential for significant drug interactions, but it’s important to inform your doctor if you’re taking:
Live attenuated influenza vaccine (avoid within 2 weeks before or 48 hours after taking oseltamivir)
Probenecid (may increase oseltamivir levels)
Other antivirals or medications that affect kidney function
Use in Specific Populations
Pregnancy: Category C – use only if clearly needed and prescribed
Lactation: Small amounts may pass into breast milk; consult a doctor
Children: Safe when used with age-appropriate dosing
Elderly: No dosage adjustment needed unless kidney function is impaired
Storage Instructions
Store at room temperature between 15°C and 25°C (59°F to 77°F)
Keep in a dry place away from moisture and direct sunlight
Keep out of reach of children