Can i alternate between diphenhydramine and doxylamine succinate for sleeping?

I am curious to understand why you would bother. Neither has an addiction potential. If you want to, I see no problem with the practice but see no benefit to trying to keep track of two sleep meds rather than just sticking with one.

Sleep hygiene remains best in the long run, including balanced activities during the day with at least some physical activity, ideally outdoors, no tv or computer before bed time, light dinner hours before bed time, avoiding or reducing coffee and alcohol are only few suggested changes. Nights mirror our days and they are not all meant to be the same.