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Table 1 Old and new influenza drugs

From: New treatments for influenza

Name (major brand) Effective against Recommended dose Use status; adverse drug reactions
Amantadine [43]
(Symadine, Symmetrel) [43]
Influenza A Capsule/tablet, syrup; 100 mg amantadine hydrochloride, twice a day. Mostly discontinued due to resistance; may be recalled in future epidemics.
Oseltamivir (Tamiflu) [48, 49] Influenza A, B Capsule (30, 45, 75 mg) twice a day; powder for suspension (6 mg/mL). Currently in use. Transient nausea, vomiting, abdominal pain, headache, neuropsychiatric episodes.
Zanamivir (Relenza) [36] Influenza A, B Two inhalations (5 or 10 mg each). Currently in use. Relatively rare adverse drug reactions include nausea, diarrhea, respiratory problems, dizziness.
Laninamivir [50, 51] Influenza A, B (for example, H1N1, H3N2) Single inhalation (20 or 40 mg). Similar to oseltamivir. Approved in Japan, but not yet in the US.
Peramivir [52] Similar to Laninamivir Intravenous 600 mg once, or 300 mg twice, 5 to 10 days. Transient nausea, vomiting, and diarrhea (similar to oseltamivir). Approved in Japan and Korea.
  1. Some information was obtained from manufacturers' inserts and/or websites.