(CNN)Pharmaceutical distributor AvKare is voluntarily recalling 100mg sildenafil tablets and 100mg trazodone tablets due to a "product mix-up," the company announced Wednesday. The tablets were "inadvertently packaged together" when they were bottled by a third-party vendor.Sildenafil is the active ingredient in Viagra, which is used for the treatment of erectile dysfunction. Trazodone is used to treat major depressive disorder. Unintentional consumption of sildenafil can pose serious health risks for those with underlying health issues, such as lowering blood pressure to dangerous levels for those taking prescriptions containing nitrates.