In controlled clinical trials two MS patients accidentally received up to 60 mg LEMTRADA (i.e., total dose for initial treatment course) in a single infusion and experienced serious reactions (headache, rash, and either hypotension or sinus tachycardia). Doses of LEMTRADA greater than those tested in clinical studies may increase the intensity and/or duration of infusion-associated adverse reactions or its immune effects.
There is no known antidote for alemtuzumab over dosage. Treatment consists of discontinuation of the medicinal product and supportive therapy.