Hi,
You can select chemistry as specialization in Bachelor of Science degree, followed by Masters and PhD . With an Associates Degree in chemistry you can become a technician in a pharmaceutical research or testing laboratory. Also you can work as a bench chemist in quality control, manufacturing, or a research lab.

In private companies you can make entry as scientist after getting some exposure. There are many pharmaceutical companies in India and abroad which are working on drug discovery and formulation aspects.

You can also work in government sector as an assistant scientist,  research scientist,  professor ,etc.
Hope it helps...