ExoticRx · exoticrx.com/drugs/sildenafil
US brand names:Viagra, Revatio
Sildenafil is dosed at 1–5 mg/kg PO q8-12h in african grey parrots, per 283. Fitzgerald BC, Dias S, Martorell J. Cardiovascular drugs in avian, small mammal, and reptile medicine. Vet Clin North Am Exot Anim Pract. 2018;21(2):399-442. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.493 doi:10.1016/j.cvex.2018.01.015 — Carpenter's Exotic Animal Formulary 6th ed, Table 5.18 (Miscellaneous Agents Used in Birds). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929. Verify against current literature before clinical use.
Inhibits phosphodiesterase-5, preventing cGMP breakdown in pulmonary vascular smooth muscle, causing pulmonary vasodilation.
Used for pulmonary hypertension in dogs. Hypotension possible. CONTRAINDICATED with nitrates. Monitor systemic blood pressure. Give with or without food.
Species references:All African Grey Parrot drugsAll Amazon Parrot drugsAll Dog (Domestic) drugsAll Pet Rat drugs
Each ExoticRx dose rule is graded by the strength of its primary evidence — see the editorial process.
A dog/cat sample is shown here. Cited dosing for all 4 species — reptiles, birds, pocket pets, livestock, and equine — is free on the per-species pages above. Pro adds the weight-based calculator for every species.
| Species | Route | Dose | Frequency | Evidence | Source |
|---|---|---|---|---|---|
| Dog (Domestic) | PO | 1–3 mg/kg | q8h | Moderate | Bach J, Rozanski E, MacGregor J. Retrospective evaluation of sildenafil citrate as a therapy for pulmonary hypertension in dogs. J Vet Intern Med. 2006;20:1132-1135. doi:10.1111/j.1939-1676.2006.tb00711.x — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.1187 (2026-08-01). — Plumb's 10th ed (held) printed p.1160, Sildenafil monograph spanning p.1159-1160; page located 2026-08-05 from the book's own running heads, and carries this exact dose under the matching species heading. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207 |
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View PlansSource citations and evidence levels available on the live page. Reference only — verify against current literature before clinical use.