The German company last year approached the Intellectual Property Appellate Board after the local patent authority granted a "compulsory license" to Natco Pharma Ltd.
Shares of Novartis India fell almost 5% on the Bombay Stock Exchange, while stocks of generic drugmakers such as Cipla and Natco rose after the judgement.
The Indian Controller General of Patents, Designs and Trademarks allowed Natco to make copies of the liver- and kidney-cancer drug on the grounds that Nexavar was too expensive for most people in India.
The patent body allowed Natco to legally make and sell the low-cost version of Bayer's drug on the condition that it pay a royalty of about 6% of the net sales from the drug to the German company.
Last year, India's patent office allowed local drug manufacturer Natco Pharma Ltd. to produce a generic version of Bayer's kidney and liver cancer drug Nexavar on the grounds it would make the drug available to the public at a reasonably affordable price.