Are there any muscle relaxers that should not be used with Effexor?

Yes, certain muscle relaxers may interact with Effexor (venlafaxine). Specifically, muscle relaxants that have sedative effects, such as cyclobenzaprine, may increase the risk of side effects like dizziness or drowsiness when combined with Effexor. It's essential to consult a healthcare provider before using any muscle relaxers with Effexor to ensure safety and avoid potential drug interactions.