A smaller amount of diclofenac from Voltaren gel gets into the bloodstream compared to oral forms of diclofenac. Still, Voltaren gel can still cause dangerous side effects if used inappropriately.

Diclofenac sodium 100mg; ext-rel tabs ... Increased risk of GI bleed with anticoagulants, antiplatelets, oral corticosteroids, SSRIs, SNRIs, smoking, alcohol, or prolonged NSAID therapy; monitor.