Finasteride (proscar) & Digestive Issues

Question

Hi,

I've been on 1mg Proscar (5mg split into 4) for 4 months. About a month ago I experienced a fairly severe, lingering pain in my upper left abdomen. I was bloated, constipated and often in pain. Now, my stools have been irregular; often yellowish and sometimes pebbles. Has anyone experienced similar sides from finasteride? 

Please help.

I didn't find the right solution from the Internet.

References:-

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Thanks