The study is designed to examine the efficacy and safety of AD036 to treat obstructive sleep apnea. The study is a three-period single-dose randomized crossover design in which patients will undergo overnight Home Sleep Apnea Testing (HSAT) with dosing of one of the following 3 treatments: AD036, Atomoxetine, or Placebo. Participants will return 1 week after their final crossover HSAT for an end of study (EOS) Visit.
