For sildenafil/ epoprostenol- behandlede patienter var den samlede hyppighed for ophør med behandling på grund af bivirkninger 5, 2% sammenlignet med 10, 7% hos de placebo/ epoprostenol- behandlede patienter.
The overall frequency of discontinuations in sildenafil/ epoprostenol treated patients due to adverse events was 5.2% compared to 10.7% in the placebo/ epoprostenol treated patients.