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24 July 2015 Last updated at 12:03 BST
But only 15% of them are women.
Satya Vadlamani is running her own manufacturing plant near the city of Pune, Murli Krishna Pharma. The BBC went to meet her.
Produced by Kinjal Pandya-Wagh
India is the third largest producer of medicines in the world, an industry that employs nearly 50 million people.