Used in the treatment of Wilson’s disease, a condition where copper accumulates in the body. It acts as a chelating agent, binding excess copper and promoting its excretion through urine. Also prescribed for cystinuria, a genetic disorder causing kidney stones, by reducing cystine levels in urine. Has been used in rheumatoid arthritis to slow disease progression, though its use is limited due to potential side effects. Occasionally used in the management of severe heavy metal poisoning.