Please store the medicine in a cool, shaded place.
Tips
usage
Common on medicine and food labels: 阴凉处保存 (store in a cool, shady place) and 阴凉干燥处 (cool, dry place). 阴 here means 'shaded / out of sunlight' (its original sense — the shady north slope of a mountain), not 'gloomy'.
memory
阴 (shade, no sun) + 凉 (cool) — combines the absence of sunlight with the resulting coolness. Picture stepping under a leafy tree on a hot day.