3 ms·People with sleep apnea are advised to sleep with CPAP machines.by trevyn 8y agoPeople with sleep apnea are advised to sleep with CPAP machines.Apocryphon 8y agoRight, but also on their back while wearing their masks.pkaye 8y agoI'd think that sleeping on the side would be better for them.maccio92 8y agoNot sure about most masks, but the one my dad has would be super uncomfortable to lay on his side