Does Taking Siladol Cause Loose Motions?

i have been diagnosis as bph,having prostate size of 50 gms,i am taking silsdol since 4 months,have relief to some extent,but recent after taking siladol tablet,i feel decentry/loose motion,is it due to side effect of medicines or other reasons.how long i can continue this medicine without side effect or change some medicine like dynapress and alfoo ,please suggest. i am 49 year old and facing problems since last 6 month