(g) urination and defecation may be a side-effect of taking effexor
. Other side effects which may be due to taking effexor
and which I exhibit include: vertigo, impulsive behaviour, insomnia, dizziness, vivid/abnormal dreams, apathy and fatigue; side effects from taking NAVAL include: sedation, nausea and dizziness which I experience occasionally. Beginning in September 2009 I had what is known as benign vertigo and I got rid of it after 2 months with standardized exercises.