Rosacea triple cream and tret

My derm prescribed two different creams. One is .025 tret and aloe. The second is the rosacea triple cream with azelaic acid, ivermectin, and metronidazole. I’ve been using the triple cream nightly for a month.

If I want to slowly incorporate the tret/aloe cream, how should I do this? Both at night but applied separately? One in the morning ? Can I use other toners or serums with either or both of these prescription creams? Thank you!