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Safety Information

VIAGRA®(sildenafil as sildenafil citrate)

Indications and Clinical Use:

VIAGRA is indicated for the treatment of erectile dysfunction (ED), which is the inability to achieve or maintain a penile erection sufficient for satisfactory sexual performance.
Not indicated for use in women or children.

Contraindications:

  • Patients taking any type of nitrate drug therapy, or who utilize short acting nitrate-containing medications, due to the risk of developing potentially life-threatening hypotension.
  • Use of organic nitrates, either regularly and/or intermittently, in any form (e.g., oral, sublingual, transdermal, by inhalation)
  • In men for whom sexual activity is inadvisable
  • Patients with ED with previous episode of non-arteritic anterior ischaemic optic neuropathy (NAION)

Relevant warnings and precautions:

  • History of Cardiovascular disease
  • Patients taking an alpha-blocker
  • Underlying conditions that could be adversely affected by the vasodilatory effects of VIAGRA
  • Combination with sodium nitroprusside (a nitric oxide donor) or heparin
  • Patients with bleeding disorders or active peptic ulceration
  • Consider starting dose reduction in patients with hepatic, and/or severe renal impairment, and/or elderly patients
  • Reports of a decrease in or, sudden loss of, vision in one or both eyes
  • Increased risk of NAION
  • Patients with retinitis pigmentosa (minority have genetic disorders of retinal phosphodiesterases)
  • Visual effects
  • Sudden decrease or loss of hearing which may be accompanied by tinnitus and dizziness
  • Priapism
  • Use in combination with other agents for the treatment of ED
  • Caution in patients with anatomical deformation of the penis
  • Stevens-Johnson’s Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN)

For more information:

Please consult the product monograph by clicking here for important information relating to adverse reactions, interactions, and dosing information.

VIAGRA ® Pfizer Products Inc., owner/Pfizer Canada Inc., Licensee