The following undesirable effects include those reported with Cataflam sugar-coated tablets, oral drops and/or other pharmaceutical forms of diclofenac, with either short-term or long-term use. (See table.)

Description of selected adverse drug reactions: Arteriothrombotic events: Meta-analysis and pharmacoepidemiological data point towards an increased risk of arteriothrombotic events (for example myocardial infarction) associated with the use of diclofenac, particularly at a high dose (150 mg daily) and during long-term treatment (see Precautions).
Visual effects: Visual disturbances such as visual impairment, blurred vision or diplopia appear to be NSAID class effects and are usually reversible on discontinuation. A likely mechanism for the visual disturbances is the inhibition of prostaglandin synthesis and other related compounds that alter the regulation of retinal blood flow resulting in potential changes in vision. If such symptoms occur during diclofenac treatment, an ophthalmological examination may be considered to exclude other causes.
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