Amifampridine (Oral gavage; 10 mg/kg; once) can antagonize muscle paralysis following BoNT/A intoxication. Amifampridine (2.5 mg/kg (IV); 10 mg/kg (PO); once) shows 1 hour plasma half-life and about 57% bioavailability (F) in mice. Amifampridine has a short plasma half-life and can induce seizures when present at high concentrations, following penetration of the blood-brain barrier.