Side effects - Methadone causing me to talk in my sleep

[XthisloveX]

Im sorry if this is a repost I searched for an hour and didn't find a thread relevent to my question. But swim is on methadone for pain management, and swim finds himself trying to sleep and falls asleep (but not really, at least not a deep sleep at ALL) and has vivid dreams and wakes up 20 minutes later realizing that swim has been talking in his sleep. For example swim told me he fell asleep at 3:30AM or so and had a dream he was talking to his sister on the phone, he woke up twenty minutes later because he could hear himself actually talking in his sleep. So my question...is this normal? Swim is also on effexor for anixety and topamax for migraines. Does this happen to other people on methadone? I know vivid dreams are normal, but talking in your sleep? Swim says its getting to the point it creeps him out.

Medicine layout:
Methadone 40mg's @ 7am & 7pm
Effexor 55mg's @7am (weaning off)(just started to, so this isnt the prob)
Topamax 50mg's @ 7am & 7pm