I 12 ud af de 21 tilfælde (Chiron et al, Lancet, 2000) forsvandt bivirkningerne dog, da dosis af det ledsagende præparat blev reduceret.
21 patients on stiripentol had moderate side- effects (drowsiness, loss of appetite) compared with eight on placebo, but side-effects disappeared when the dose of comedication was decreased in 12 of the 21 cases (Chiron et al, Lancet, 2000).