Are you in Hong Kong? It took some research to find information on these medications. For the benefit of others, let me list more familiar names for these medications...
Dogmatil is sullpiride, an antipsychotic medication.
Rivotril is clonazepam, aka Klonopin
Seroxat is paroxetine, aka Paxil
There's a difference between addiction and dependence. Rivotril, a benzodiazapine medication, is one that you can definitely build a dependence on.
Dogmatil and Seroxat don't fall into this category, but may be difficult if you ever want to discontinue them. The way to do that would be to taper off of them under the supervision of your doctor.
Yes, impotence is listed as a possible side effect of Dogmatil. Potential side effects of Rivotril include decreased libido and ejaculatory dysfunction.
If you're having problems with side effects, talk with your doctor. He may be able to change your medications.
Hope this helps,