This study will evaluate the safety and tolerability of orally administered EUR-1100 once or twice daily. Eligible subjects will be randomized into one of the 3 treatment groups. The Treatment Period will be 8 weeks during which subjects will visit the clinic at the screening visit, randomization, week 4, 8 and 1 week after end of treatment for clinical symptom assessment and safety evaluation. Additional phone visits will occur at week 2 and week 6.