Answer:
The correct answer is - Avanafil (Stendra).
Step-by-step explanation:
Sildenafil and Avanafil both are PDE5 inhibitors that are used for sexual dysfunction or erectile problems in males. Sildenafil is more used and famous, however, Avanafil is a better PDE5 inhibitor as in the same dose it is more effective for a longer period of time and shows its effect faster than the sildenafil.
This client will get help in his situation by switching to Avanafil.