Gastritis problems cause by Proscar?

[deuce]

Hello everyone. I have been taking a quarter of proscar everyday for about two months now. Was taking a quarter every three days for two months before that. Never had any problems really but about a month ago I keep getting stomach problems, such as upset stomach, heartburn, belching every few minutes. It is miserable. i went see a Dr. and he said there is nothing to be done until they put a tube down my throat. I have that scheduled for January. Has anyone heard of fin causing these types of problems? I never had these kind of problems before, but it could just be from years of eating unhealthy. I know It sucks and I do not want to stop fin because I am in the middle of a horrible shed. I would lose all my gains or all my losses. Please help.