Brand questions use only name pairings verified against the linked product source. Unverified pairings are withheld from these questions; the other study content remains available.
Label date: 20260709 · For learning, not clinical decisions. US label and brand information; always consult the current source.
Source snapshot checked: 2026-10-21. The source document and selected fields were compared. The complete card has not had an independent clinical review.
Mechanism: During sexual stimulation, PDE5 inhibition enhances nitric oxide effects by reducing cGMP breakdown in the corpus cavernosum, supporting smooth-muscle relaxation and blood inflow. Recommended doses have no effect in the absence of sexual stimulation.
On both cards: Used for — Erectile dysfunction · Common side effects — Headache; Dyspepsia; Flushing · Interactions — Nitrates; Alpha-blockers / antihypertensives
Only on the Sildenafil card: Common side effects — Abnormal vision; Nasal congestion · Warnings — Nitrates or guanylate-cyclase stimulators such as riociguat are contraindicated; Prolonged erection or priapism: seek emergency medical help for an erection lasting more than 4 hours; Stop use and seek medical care for sudden vision loss or sudden decrease/loss of hearing · Interactions — CYP3A4 inhibitors (ritonavir)
An item counts as shared only when both cards use the same wording. If a card does not list an item, that is not a statement that the effect never occurs.
Capsera