Thing is, each medication takes between 4 - 8 weeks to get fully into a persons system, then each change in dose has the same time frame.
I can't tell you what the "right" thing to do is, but I know for me I was living with my (now) husband and I had to talk to him about it, because I didn't understand "it" or the effects it was having on him. There was only me and our 3 young babies... You know her, you'll know the best thing to do. You have options though, text, call or write and email or a letter - that way you can say whatever you need to without it becoming an argument.