Medical care, especially drugs, greatly increasing in price for old. 2/3rds of over 65 have at least one cintinuing prescription.
Not all prescriptions are for expensive medicines. I'd say many of them are generic drugs which cost pennies per day.
For instance, the CFC ban in 2008 caused generic albuterol to go off the market: https://www.scientificamerican.com/article/unlikely-victims-...