An open label, balanced, randomized, two-treatment, two-period, two-sequence, single-dose, crossover, bioequivalence study comparing Ruxolitinib Tablets, 20 mg, manufactured by Sun Pharmaceutical Industries Limited, India with JAKAVI (ruxolitinib) tablets 20 mg, (each Jakavi 20 mg tablet contains 26.40 mg of ruxolitinib phosphate equivalent to 20 mg of ruxolitinib). Imported by: Novartis Biociências SA Av. Prof. Vicente Rao, 90 - São Paulo - SP CNPJ: 56.994.502/0001-30. Manufactured by: Novartis Pharma Stein AG, Stein – Switzerland, in healthy adult, human subjects under fasting condition.