You should always take doctor prescribed meds as directed. IF should never supercede a doctor’s advice on taking meds. So if you need to take blood pressure meds in the morning, IF needs to take a back seat to that (though you can always talk to your doctor about your diet goals and see if there’s a better option).
If it’s homeopathic and not prescribed by a physician, since it contains sugar, it may break your fast by triggering insulin response. If you can safely forgo the homeopathic meds, I would wait until you eat food to take those. I also only take multivitamins with food, just to be on the safe side.