There are many pharmacies in Prague, identified as lékárna, and most city districts have one that stays open 24 hours. Among the most recognizable are the District Clinic (224 946 982; Palackého 5, 7am-7pm Mon-Fri, 8am-noon Sat; metro Národní třída) in Nové Město and Lékárna U sv Ludmily (222 513 396; Belgická 37, 7am-7pm Mon-Fri, 8am-noon Sat; metro Náměstí Míru) in Vinohrady. For emergency service after hours, push a red button marked with a sign zvonek lékárna (pharmacy bell) and/or první pomoc (first aid) to ring the bell to allow staff to let you in. Always bring enough prescription medicines for your trip as some may not be available.