Diclofenac is also available over-the-counter in some countries: mg diclofenac as potassium salt in Switzerland (Voltaren dolo), the Netherlands (Voltaren K), and preparations containing 25 mg diclofenac as the potassium salt in Germany (various trade names), New Zealand , Australia , Japan , (Voltaren Rapid), and Sweden (Voltaren T and Diclofenac T). Diclofenac as potassium salt can be found throughout the Middle East in 25-mg and 50-mg doses (Cataflam). Solaraze (3% diclofenac sodium gel) is topically applied, twice a day for three months, to manage the skin condition known as actinic or solar keratosis . Parazone-DP is combination of diclofenac potassium and paracetamol, manufactured and supplied by Ozone Pharmaceuticals and Chemicals, Gujarat, India. It is sold in Uruguay alone or, in combination with orphenadrine to treat muscle spasms/pain due to injuries (Dicloflex Ion).
Metabolism of propanoate begins with its conversion to propionyl coenzyme A (propionyl-CoA), the usual first step in the metabolism of carboxylic acids. Since propanoic acid has three carbons, propionyl-CoA can directly enter neither beta oxidation nor the citric acid cycles. In most vertebrates, propionyl-CoA is carboxylated to D-methylmalonyl-CoA, which is isomerised to L-methylmalonyl-CoA. A vitamin B 12 -dependent enzyme catalyzes rearrangement of L-methylmalonyl-CoA to succinyl-CoA, which is an intermediate of the citric acid cycle and can be readily incorporated there.