I just got back from spending five weeks in Mexico running from the winter. I saw this sign at the grocery store pharmacy while I was there. They won’t sell antibiotics without a prescription as of the start of 2024.
Every country has different rules about what drugs they will sell over the counter. Costa Rica hasn’t sold antibiotics without a prescription for almost 20 years.
The Mexican stand alone pharmacies will still sell you whatever antibiotic you want, but I expect that might change in the future.