Urgent: hard to pee on tramadol?

[Angrytelepath17]

I've bene told tramadol can damage one's liver, so my male friend SWIM is just wondering if it's normal to have a weak stream peeing, and to have a hard trying to start peeing, and kind of a weird sensation when he does. Swim took 2 50mg pills at 4:30pm, 1 50mg pill at 730, and one more 50mg pill around 8:30 or 9. Last night swim took 2 50mg pills, then 2 more 50mg pills 4 hours after that, and he also had the same experience peeing. SWIM would appreciate an answer quickly because if these are signs of liver damage he needs to figure out what to do, and if they're not he plans on taking another shortly as it's been about four hours since his last two