Randomized, two-way, two- period, single oral dose, open- label, crossover, bioequivalence study to compare Diclofenac Potassium powder for oral solution (50 mg diclofenac potassium) manufactured by Riyadh Pharma versus Catafast® powder for oral solution (50 mg diclofenac potassium) manufactured by Mipharm S.p.A., in healthy subjects under fasting condition.