De senest rapporterede bivirkninger, som forekommer hyppigere i sildenafil/ epoprostenol - gruppen, er blodsprængte øjne/ røde øjne, sløret syn, tilstopning af næsen, svedtendens om natten, rygsmerter og mundtørhed.
Newly reported adverse drug reactions, which occurred more frequently in the sildenafil/ epoprostenol group, were bloodshot eyes/ red eyes, blurred vision, nasal congestion, night sweats, back pain and dry mouth.