An Indian pharmaceutical company in Hyderabad claims that it can revamp the production of antiviral drugs, which can tackle the swine flu as the World Health Organisation warned of an imminent pandemic. Hyderabad-based Hetero Drugs, the only supplier in India licensed by Swiss-based Roche, could ramp up production to reach monthly capacity of about 80 million doses of 'oseltamivir or Fluvir', used to treat swine flu cases, within weeks.