Hello,
There are many government colleges offering B.pharma in Tamil Nadu, I'm naming some of them below:

1. Madras medical college, chennai

2. National institute for research in tuberculosis, chennai

3. Tamil Nadu veterinary and Animal sciences University, chennai

4. Academy of scientific and innovative research, chennai

5. Dr. MGR Educational and research institute, chennai

6. Tamil University, Thanjavur

7. Madurai medical college, madurai

8. Annamalai University, Annamalai nagar

9. Manonmaniam sundaranar university, tirunelveli

10. Alagappa university, Karaikudi

Hope this helps, all the best.