ability to function

[tricknick]

can tamadol cause ED?

[shinty]

It's possible. Not everyone reacts to any given medication in the same way, all the time, every time. Talk with your doctor about it. I'm sure their are other medications you can try without that particular side effect to worry about.
                         GOOD LUCK,
                                       Shinty

[Caryopteris]

Even if it's not a common side effect, that doesn't mean it doesn't happen to some people.  If it's not necessary, you might want to take a break from it and see.