Health Canada is warning consumers that an unauthorized drug, “Stiff Rock” promoted for male sexual performance enhancement was seized from Boutique Érotique 5ieme avenue (also known as Boutique Érotique Liberté), 507 Gande-Île., Valleyfield, QC after Health Canada testing confirmed that the product contained drug ingredients: sildenafil; aminotadalafil; and hydroxythiohomosildenafil.

Stiff Rock/Health Canada
Stiff Rock/Health Canada

A shipment of “Stiff Rock” was seized at the border and testing revealed the presence of sildenafil, aminotadalafil and hydroxythiohomosildenafil. As a result, Health Canada seized additional units of “Stiff Rock” from the importer, Boutique Érotique 5ieme avenue (also known as Boutique Érotique Liberté).


Health officials note products containing sildenafil should only be used under the supervision of a healthcare practitioner. Sildenafil should never be used by individuals taking any kind of nitrate drug (e.g. nitroglycerine) as it can cause potentially life-threatening low blood pressure. Individuals with heart problems including high blood pressure, a history of heart attack, stroke, abnormal heart beat or chest pain, are at higher risk of cardiovascular side effects. Other possible side effects of using sildenafil include headache, facial flushing, indigestion, dizziness, abnormal vision and hearing loss.

Hydroxythiohomosildenafil is a substance similar to sildenafil, and may pose similar health risks.

Aminotadalafil is a substance similar to tadalafil, a prescription drug used to treat erectile dysfunction and may pose similar health risks.

The affected product is available in one tablet per blisterpack, LOT: 100237, EXP: 2016-04-01

Health officials advise the public to consult with your healthcare professional  if you have used this product and have any health concerns and to report any adverse events to Health Canada.