About three in ten adults report not taking their medicines as prescribed at some point in the past year because of the cost. This includes about one in five who say they have not filled a prescription (21%) or took an over-the counter drug instead (21%), and 12% who say they have cut pills in half or skipped a dose because of the cost.
https://www.kff.org/health-costs/poll-finding/public-opinion-on-prescription-drugs-and-their-prices/