🇺🇸 H1N1 vaccination in United States

10 US adverse-event reports

Marketing authorisation

FDA

• Status: approved

Safety signals — FAERS

Adverse reaction reports describe suspected side effects. A report does not mean the drug caused the event — co-medications, underlying disease and coincidence all contribute.

• Window: 20 April 2025 – 20 April 2026
• Total reports: 10

Most-reported reactions

1. Arthropod Bite — 1 report (10%)
2. Defaecation Urgency — 1 report (10%)
3. Depression — 1 report (10%)
4. Dermal Cyst — 1 report (10%)
5. Diarrhoea — 1 report (10%)
6. Dizziness — 1 report (10%)
7. Fatigue — 1 report (10%)
8. Feeling Hot — 1 report (10%)
9. Frequent Bowel Movements — 1 report (10%)
10. Haematochezia — 1 report (10%)

Source database →

Frequently asked questions

Is H1N1 vaccination approved in United States?

Yes. FDA has authorised it.

Who is the marketing authorisation holder for H1N1 vaccination in United States?

University of Pennsylvania is the originator. The local marketing authorisation holder may differ — check the official source linked above.