By the sounds of it, some of the other members have better advice than mine on this topic. I can answer the chemistry questions about the med, and even provide a medical rationale to its prescription (I'm NOT a doctor!!!), but I cannot speak to the long-term effects.
Take what you will from my words, but it appears avisg, vicki595, and, as always, IBKleen know what they're talking about from a practical standpoint, at least more than I do. I'd listen to them.