Notice it, say it to a doctor, and stop carrying it alone.

One small thing you could do

If you are out of a medicine you need, or seriously unwell, phone the prescriber or a pharmacist now, and call 911 (US) or 999 (UK) in an emergency. Otherwise, write down the medicine’s name and strength, and phone the pharmacy. Ask: is there a generic, what does it cost if I pay each way I can (insurance, a discount card, cash), and does the maker or a nonprofit run a help program for it? Then ask the prescriber whether a different medicine or a longer supply would cost less. In England, use the NHS Business Services Authority’s eligibility checker before you pay for another item; the NHSBSA says prescriptions in Scotland and Wales are free, and nidirect says they are free in Northern Ireland. Give true answers about your income and coverage to every office.