3 DOSAGE FORMS AND STRENGTHS. Effexor XR® (venlafaxine hydrochloride) extended-release capsules are available in the following strengths: mg. According to hmcpharmaceuticals.com, 30 capsules of 75 mg generic venlafaxine ER cost approximately $ 30 capsules of 75 mg Effexor XR cost. Venlafaxine, sold under the brand name Effexor among others, is an antidepressant medication . Published retrospective studies report that venlafaxine overdosage may be associated with an increased risk of Healthcare professionals are advised to prescribe Effexor and Effexor XR in the smallest quantity of capsules. Effexor and Effexor XR have been shown to maintain an antidepressant effect for up click to see more 26 weeks. An overdose of Ecfexor could be fatal, so seek immediate help or call the Poison Help Line at if you overdose. The other interaction involves Effexor and Celebrex. Laura Cable, PharmD. If your depression symptoms seem to effdxor worsening, rule out other reasons for this first. Venlafaxine can increase eye pressure, so those with glaucoma may require more frequent eye checks. At the same time, fluoxetine Prozac halved the suicide risk. Q: Are generic antidepressants just as effective as the brand names.