A lot of times this can be remedied by changing the dosing schedule, ie, breaking up a once daily dose into twice a day...or changing the time of
administration.
Generally speaking, these types of meds (like Effexor) improve with INCREASING dosages, not decreasing. Your dose is average....there is still some room to increase. Have you noticed a significant improvement in the past when increasing the dose? If so, you may want to discuss some changes with your doctor.