Okay **I'm not a christian and I feel the need to make that disclaimer before this post**
Most people in the pagan community would consider what you have to be a rare gift that with training could be of huge benifit to you and possibly to the spirits you see and many other applications. Medication has been suggested to get rid of your 'ablility' let's call it. That's one avenue, and a valid one. Another is training. With proper sheilding ablility and proper control of your 'ability' you could stop it from coming upon you unwanted, while still retaining the ablility to use it in the future.
Of course, only you can decide. If this 'ablility' makes you uncomfortable more than it interests you, then medication might be the better option, considering also you're religious choice. However, there are other avenues of controlling the problematic parts without damaging the useful parts that you might consider.