What is the ruling on studying pharmacy and working in it, knowing that medicines may contain prohibited substances such as gelatin and alcohol? And are there other Shariah-related issues in this field that one should be aware of?

The questioner is advised not to abandon the field of pharmacy, which they love. The presence of animal gelatin or alcohol in the production of some medicines and medical preparations does not necessitate a ruling of absolute prohibition. The matter is easier than that regarding usage, sale, and prescribing medicine.