All that being said, if you happen to feel uncomfortable with your Doctor’s assessment make it clear. He or she should take the time to explain the pro’s and con’s in your particular situation, hopefully put you at ease and, ideally, come to a shared decision when it comes to a treatment plan.
If possible, show the medicine that you were on back home to the GP, who can check the indication and can if necessary prescribe this medication or find you an appropriate alternative. Prescriptions are filled at a Pharmacy.