Changes in Height Pediatric Patients: During the eight-week, placebo-controlled GAD studies, Effexor XR-treated patients ages 6-17 grew an average of. Alcohol Although venlafaxine has not been shown to increase the impairment of mental and motor skills caused alcohol, patients should be advised to avoid alcohol while taking venlafaxine. Be especially watchful for these symptoms when new antidepressant is started or when the dose is changed. Management of overdosage There is no specific antidote for venlafaxine and management is generally supportive, providing treatment for the immediate symptoms. In case of emergency overdose Return to top kjope venlafaxine uten resept In case of overdose, call your local poison control center at 1-800-222-1222. Impairment of Fertility Reproduction and fertility studies in rats showed no effects on male or female fertility at oral doses of up to times the maximum recommended human daily dose on mg kg basis, or up to times on mg m2 basis.