Q: As a medical professional what is my role when an ingredient is haram?

A: As Muslims we must first prescribe the halal option, if a halal option does not exist, than to the extent that a prescription is necessary, to that extent one can prescribe the haram option. Once a halal option comes by, that must be given first preference.

Using a haram (spiritually forbidden) option when a halal one exists pollutes ones earning and reduces ones barakah. It also violates the rule of helping society attain that which is good (aka: امر بالمعروف و نهى عن المنكر )

Allah Certainly Knows Best.

P.S. Sorry for delay in response.