carbidopa/levodopa and fatique

been on 25/100 quick release CL for about a month - have noticed some fatique the last week or so / almost 75 yr old diagnosed about 1.5 yrs ago (probably had PD 2-3 yrs before that) / no sense of smell, slight difficulty swallowing (no blockage) and some slight to moderate hand tremors / strong as ever , good balance - exercise every day (rock steady, walking w/ a little weight lifting)