Treatment guide · Influenza
Tamiflu online — how to get oseltamivir prescribed today
Oseltamivir works best inside the first 48 hours of flu symptoms. Here's the dosing, the timing rules, side effects, alternatives, and how to get it prescribed without leaving the house.
Standard dosing
- Adult treatment: oseltamivir 75 mg PO twice daily × 5 days, started within 48 hours of symptom onset.
- Adult prophylaxis after exposure: 75 mg PO once daily × 7–10 days.
- Children (over 1 year): weight-based, 30–75 mg PO twice daily × 5 days.
- Single-dose alternative: baloxavir (Xofluza) 40–80 mg PO once, by weight.
- Kidney impairment: dose reduced when creatinine clearance is below 60 mL/min.
Who should be treated even past 48 hours
- Pregnancy or up to two weeks postpartum
- Age 65+ or under 2 years
- Asthma, COPD, heart disease, diabetes, chronic kidney or liver disease
- Immunosuppression — transplant, chemotherapy, HIV, long-term steroids
- Anyone hospitalized or clinically worsening
Side effects and safety
- Common: nausea, vomiting, headache — take with food.
- Uncommon: rash; rare neuropsychiatric events, mostly reported in children.
- Not a substitute for the annual flu vaccine.
- Seek in-person care for trouble breathing, chest pain, confusion, or dehydration.
Frequently asked questions
Can I get Tamiflu prescribed online?
Yes. An Ondoc licensed clinician reviews your symptoms and timing by video or async visit and can e-prescribe oseltamivir (Tamiflu) to your pharmacy the same day when influenza is the likely diagnosis.
What is the adult Tamiflu dose?
Treatment: oseltamivir 75 mg by mouth twice daily for 5 days. Prevention after a household exposure: 75 mg once daily for 7–10 days. Doses are reduced in significant kidney impairment.
How fast do I need to start it?
Ideally within 48 hours of the first symptom — that's where the benefit is largest (about a day shorter illness plus fewer complications). Beyond 48 hours it's still recommended for high-risk patients and anyone deteriorating.
What is the pediatric dose?
Weight-based for children over 1 year: roughly 30 mg twice daily under 15 kg, 45 mg for 15–23 kg, 60 mg for 24–40 kg, and 75 mg above 40 kg, all for 5 days. Your clinician confirms dosing against current weight.
What are Tamiflu's side effects?
Nausea and vomiting are the most common and are reduced by taking it with food. Headache is common. Rarely, neuropsychiatric events (confusion, unusual behavior) have been reported, mostly in children — stop and seek care if they occur.
Is Xofluza (baloxavir) better?
Baloxavir is a single oral dose instead of 5 days of twice-daily pills, with similar symptom-duration benefit. It's a good fit when adherence is the concern; oseltamivir has more data in pregnancy and in high-risk patients.
How much does oseltamivir cost?
Generic oseltamivir is inexpensive on most insurance formularies and commonly $20–$50 cash with a discount card. Brand-name Tamiflu is significantly more.
Can I take Tamiflu while pregnant?
Oseltamivir is the preferred influenza antiviral in pregnancy — pregnant patients are at higher risk of severe flu, and treatment is recommended regardless of vaccination status. Discuss it with your clinician promptly.
Symptoms started in the last two days?
Book an Ondoc visit now — clinician evaluation, testing when it helps, and oseltamivir e-prescribed to your pharmacy when appropriate.