Study population
All subjects are adult males (aged 20-40 years) with normal weight according to the a body mass index BMI. The subjects who have atopic constitution or asthma and/or known allergy for Favipiravir and/or any of the excipients of the products and who have any history or presence of clinical relevance of cardiovascular, neurological, musculoskeletal, haematological, hepatic, gastrointestinal, renal, pulmonary, endocrinological, metabolism were excluded from the study. The inclusion and exclusion criteria were established clearly together with the reasons for withdrawal from the study. The subjects who were willing to participate in the clinical trial signed the informed consent form on their own freewill and understood that they could withdraw from the study anytime without specifying any reason.