Diclofenac (marketed as Voltaren and Cataflam) is a non-steroidal anti-inflammatory drug (NSAID) taken to reduce inflammation, such as in arthritis or acute injury. Cataflam can be used to reduce period pain.

The difference between Voltaren and Cataflam is that Voltaren is the sodium salt of diclofenac, and Cataflam is the potassium salt.

The exact mechanism of action is not known, but it is thought that inhibition of prostaglandin synthesis causes its anti-inflammatory action.


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