Ba'ltmasor Syndrome
Ba'ltmasor Syndrome was a disease which required injections once a week.

Klingon exobiologist J'Dan suffered from this disease. When he was stationed aboard the  in 2367, he would regularly come to sickbay to get his injections, which were administered on at least two occasions by Crewman Simon Tarses. ()

de:Ba'ltmasor-Syndrom
Medical conditions