Ozone Pharmaceuticals Limited is an Indian pharmaceutical company with its headquarters in New Delhi, India. The company was founded by Subhash Sehgal in the year 1991. It was incorporated on the 13th of March in the year 1991. Sehgal currently serves as the chairman and managing director at the Ozone Group of Companies. The beginnings were quite difficult for Sehgal as he belonged to a middle class family. He started working at the tender age of nineteen and was employed as a sales representative at Charak Pharmaceutical. He then worked at Jackson Pal, Days Medical Store and Glaxo Pharmaceutical. Sehgal was making just five hundred rupees in one month. With his growing aspirations, he collected four of his friends and set up a company by the name Seagull Labs India Pvt. Ltd. however, he resigned sometime later from it and started Ozone Pharmaceuticals Limited in the year 1991. Sehgal had to work tirelessly for the growth of his startup. His family was his biggest support system, especially his wife Geeta who had to give up her PhD to take care of the family. The business has been a family one and is being handled by the family with Sehgal’s son, daughter, wife and daughter-in-law all being a part of the company. The products that are developed at Ozone Pharmaceuticals Limited have their roots in the ancient Vedic scriptures of India and the Sushruta Samhita, which is an age-old book on medicine and surgery. The ideas from the books are scientifically verified at the research facilities and launched into the markets thereafter. Nomarks is one of the most well-known and old brands of the company which was launched by Ozone Ayurvedics in 2000.

The company specializes in the therapy areas of pain management, nutritional supplements, anti- infective, vascular management, cardiology, diabetology and hemostats. Ozone also has an Ozone Professional Range which is a beauty division and deals in organic skin treatments.

Ozone Pharmaceuticals Limited has its manufacturing facilities located at Bahadurgarh, Baddi in Himachal Pradesh and Arningaon in Assam. It has a research facility called the Ozone Pharmaceuticals Ltd. (Analytical Lab). The company operates in India, UK, Canada and Nepal.

Some of the top products of the company are D.F.O, TRANOSTAT, OSIL, OZOMET-PG, DIZONE, OZOMET-VG, D.F.O 4X, OZOMET-G,D.F.O RED, TRANOSTAT-MF, AXBEX, CYNOCAL-16, CEFILAB, CYNOCAL-16 RF, OZOTEL AM, OZOTEL, OZOTEL-AMH, OZOTEL-H, CYNOCAL-LC, CYNOCAL-M FORTE, WANISH, WANTO LACT, D.F.O NANO, AXBEX-NS, OZOVAS, OSIL PLUS, XPAND, DYRECT, TOPEX-CD, CEFILAB-O, TOPEX, TOPEX-DX, OZOTRON, OZOROX, D.F.O-AQ, WANTO, OZOLAB, TOPEX-BR, C4U, IT IS, CLAVCARE, 1M, D.F.O MR, OZOVAS-F, CYNOCAL-16 NS, BLIEU, PERFEKT-D, HAND SANITIZER, OZOCAL and OZORED.