In clinical trials with trametinib monotherapy one case of accidental overdose was reported; a single dose of 4 mg. No AEs were reported following this event of trametinib overdose. In clinical trials with the combination of trametinib and dabrafenib 11 patients reported trametinib overdose (4 mg); no SAEs were reported. There is no specific treatment for overdose. If overdose occurs, the patient should be treated supportively with appropriate monitoring as necessary.