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Succimer (dimercaptosuccinic acid – DMSA)


  • 200mg capsules
  • 100mg capsules



Oral chelation therapy for heavy metal (lead, mercury, arsenic) poisoning.

Succimer (succicaptal)
  • ALERT – Consultation with a clinical toxicologist is recommended through local toxicology service or Poisons Information Centre 13 11 26.


10mg/kg (up to 600mg) q8h PO for 5 days then q12h for 14 days.

Stocking recommendations

Tertiary centre Regional centre Rural centre Remote centre

30 capsules

0 capsules 0 capsules 0 capsules


Heavy metal poisoning requiring chelation is rare. Succimer is the preferred agent given its good safety profile. Administration is not time-critical and obtaining it, as required, from a tertiary centre is suggested.


Fact sheet developed by Queensland Poisons Information Centre, Updated: July 2020.

This fact sheet is about the use of these antidotes in Australia, and may not apply to other countries. Children’s Health Queensland Hospital and Health Service cannot be held responsible for the accuracy of information, omissions of information, or any actions that may be taken as a consequence of reading this fact sheet.