I was on 80mg of Fluoxetine and took about 100mg of Tramadol daily for 2 weeks for back pain.
I was sneaky and got the Tramadol from a different doctor and told him I wasn't on any other meds,but this was because even high levels of codeine were doing nothing for my back and I was in constant pain (two herniated discs fyi).
Nothing bad happened to me,but YMMV and I coudn't,in good faith advise you that it's ok,since everyone is different.But if you're really hurting,50mg every now and then would probably be ok.Just google serotonin syndrome symptoms and keep an eye out for any reactions,and if in doubt,go straight to the ER,because SS is pretty damn serious.