My Husband Had A Complete Knee Replacement A Couple Of

my husband had a complete knee replacement a couple of years ago, after which he has been diagnosed with restless leg syndrome and was unable to sleep. He has been prescribed two doses of gabapentin 300 mg, Also he was prescribed 1 tablet of 50 mg of trazodone for sleep. Sometimes it helps, but sometimes it is ineffective. We are at a loss and hope you can shed some light as to what we should do.