Rimantadine hydrochloride is an anti-influenza virus drug. Target: Influenza Virus Rimantadine hydrochloride are oral antiviral drugs useful in the prophylaxis and treatment of influenza A virus infections. rimantadine has prophylactic efficacy comparable to amantadine but lower potential for causing adverse effects [1]. double-blind study of children with influenza-like illness. 37 received rimantadine for five days. Of the total 37 children in the rimantadine group, 27% were found to have resistant isolated compared with 6% in the total group receiving acetaminophen (P < .04). Furthermore, the mean inhibitory concentration of rimantadine increased with time in the rimantadine group (r = .4, P = .002) [2].