Tourist police, who often speak English, can be useful in emergencies; they can also help you find accommodations, restaurants, and sights. Pharmacies, clearly identified by red-cross signs, take turns staying open late. A listing is published in the local newspaper; it is best to check at your hotel to find out not only which pharmacy is open but how to get there.
Corinth (Ermou 51. 27410/23282). Nafplion (Pl. Martiou 25. 27520/28131). Olympia (Douma 13. 26240/22550). Patras (Patreos 53. 2610/451833 or 2610/451893).