Sildenafil is a phosphodiesterase-5 (PDE-5) inhibitor used to treat pulmonary arterial hypertension.
This medication is usually well tolerated but may cause vomiting and diarrhea.
Sildenafil is not FDA approved for use in animals but your veterinarian may choose to use this medication in an extra-label fashion if it is appropriate.
Do not use with nitrates.
Use with caution in animals that already have low blood pressure or bleeding disorders.
Do not use this medication in animals that are allergic to any of its ingredients.