The study will be conducted at BA/BE facility after approval from an independent ethics committee. Subjects will have a screening visit within 21 days prior to the first dose of study drug, two treatment periods with each containing a single dose of study drug, followed by 48 hours of serial PK sample collection. Subjects will check out of the unit on Day 3 (at 7am) after collection of the 48 hour PK sample. The subject will be instructed to return for the next treatment period or for the final follow-up visit, as appropriate. The final follow-up visit will occur 35 days after the last dose of study drug. Subjects will be assigned to each of the two treatments randomly as per the randomization schedule.