glycopyrrolate for drooling, helped but tremors increased

My husband has had a problem lately with drooling.. Our neurologist offered the above medicine to help with the drooling.
I noticed side effects on line said it could interfere with medicine for Parkinson’s disease.
He took 2 pills for first two days and it really helped to stop the drooling.
On the third day the tremor in his hands increased significantly after taking the Glycopyrrate, Don’t know if it was just a coincidence.
Does anyone use Glycopyrrolate and if so could you share your experience and opinion of this medicine.
Many Thanks.
Jenny