Yes. In fact, all of these things can cause sleep apnea to worsen. However, by avoiding these things you can improve sleep apnea.
For example, sleeping on your side instead of your back can reduce the occurrence of obstruction. Some people go as far as to sew a tennis ball in the back of their pajamas to encourage them to stay on their side throughout the night.
Alcohol consumption or heavy meals close to bed can also worsen OSA. Sleeping pills also run the risk of causing problems. It’s important to remember that you’re feeling tired because of the lack of quality sleep. Your body naturally wakes you if your oxygen levels get too low. The best way to right this course of poor sleep is to treat your sleep apnea.