See in the second year, there are options available for Interchanging the specialization subject if there exist some vacancies for BTech. But the transition from B.Pharm to BTech can't be done directly as the BTech ones, if you wish you need to cancel your admission and then you have to take admission in BTech.

To know more about B.Pharm visit the link below:

https://www.careers360.com/courses/b-pharma-bachelor-of-pharmacy

To know more about B.Tech visit the link below:

https://www.careers360.com/courses/b-tech-bachelor-of-technology

I hope this answer helps. All the very best for your future endeavors!