The country's largest drug maker Ranbaxy Laboratories today announced the launch of bonista teriparatide injection used in the treatment of osteoporosis (thinning of bones) in collaboration with Hyderabad-based Virchow Biotech. Ranbaxy has become the first company in the world to launch this bio-generic product, the company said in a filing to the Bombay Stock Exchange. At present, osteoporosis drugs have a market size of around Rs 219 crore in the country, growing at more than 29 per cent per annum.