I'll expand that. It is vastly expensive to get a drug to market (around £1000 million)
Excipients have to be used to give the drugs a reasonable self like and make them palitable and possible to take.
Most have no vegetarian alternatives. All will have been tested on animals (and 9/10 drugs fail to get to market as they have serious side effects detected at the animal testing phase ,and the penicillin/ guinea pigs story is deeply misleading> )
Gelatin is a common additive to capsules/ caplets. The Chief rabbi has cleared them for Jewish patients (I've seen the letter ) ditto the presence of starches round the time of passover!