Voltaren Emulgel should not be used if the patient is allergic (hypersensitive) to diclofenac (active substance) or to other substances which relieve pain and inflammation (in particular acetylsalicylic acid and ibuprofen), or if the patient is allergic to propylene glycol and isopropyl alcohol or to any of the other ingredients.
Among other symptoms, this hypersensitivity is usually manifested as: asthma, respiratory problems, rashes, urticaria, swelling of the face and tongue, runny nose.