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Its effect may last up to 36 hours.1,6 The dose can be increased to 20 mg if necessary. Safe dosing of tadalafil includes downward dosage adjustment to 5 mg in patients with moderate to severe renal insufficiency. In patients with mild to moderate hepatic dysfunction, the tadalafil dose should not exceed 10 mg.

Health Canada has seized counterfeit Viagra and Cialis from a Petro Canada gas station in Vineland, Ontario (4608 Victoria Ave.). This is in addition to&nbsp