The pharmacokinetics of dimetindene (dimethindene maleate, Fenistil, CAS 3614-69-5) were studied after its intravenous and oral administration to 8 healthy male volunteers. Serum concentrations were measured for 48 h using an enzyme-linked immunosorbent assay. Pharmacokinetic parameters (AUC, t1/2, CLs, Vd and F) were calculated using the clearance approach.