Medication for Tremors

Just been to see the neurologist with Hubby who is on Stalevo 125microgram four times a day and a 50/200 slow release at bedtime. His tremors are quite bad but he said there wasn't a medication to help these but altered the Stalevo to 150 mcg twice a day and 125 the other 2 still taking the slow release at bedtime as hubby is getting quite slow now and losing his balance.  My question is does anyone take another medication to help tremors and does it work ?