Succimer, sold under the brand name Chemet among others, is a medication tool used to treat lead, mercury, and arsenic poisoning. When it's radiolabeled with technetium-99m, it's used in many types of diagnostic testing.
Common side effects include vomiting, diarrhea, rash, and low blood neutrophil levels. Liver problems and allergic reactions may also occur with use. Whether use during pregnancy is safe for the baby is unclear.
Dimercaptosuccinic acid is in the chelating agent family of medications. It binds to a metal atom, leading to increased clearance from the body via the urine. A full course of Succimer lasts for 19 days of oral administration. A second course should be given when more than two weeks pass after the first course.
Succimer has been used medically since the 1950s. It is on the World Health Organization's List of Essential Medicines. In the United States, no generic version was available as of 2015.