Sensitivity to any of the ingredients of Lobak.
Known hypersensitivity to diclofenac sodium and in patients who respond to aspirin and aspirin-type drugs with sensitivity reactions eg, asthma, acute rhinitis and urticaria. Diclofenac sodium is absolutely contraindicated in patients with peptic ulceration or a history of such ulceration, and should be used with caution in patients with renal or hepatic insufficiency.