Tren is not known for that, it is actually the oppisite cause you have a hard time sleeping
It makes a lot of guys real lethargic actually, myself too. When you start it it makes you hyper,
then it changes. It can make it hard to sleep at the same time though, making the lethargy even worse.
I don't think lethargy is atypical. Guys tell me the same and a lot of guys on forums report the same. Very common.
The higher the dose the more lethargic you get from steroids in general.