Plethico Pharmaceuticals today announced it has successfully priced an offering of $75 million by issue of foreign currency convertible bonds.The bonds have a zero coupon with tenure of 5 years and 1 day and are convertible into equity shares at a premium of 35% over the reference share price of Rs 447.95 which is the closing price of the company's shares on the National Stock Exchange on October 15.Citigroup acted as the sole bookrunner to the transaction.