However, do not discontinue prescribed B12 treatment without medical advice, particularly if you have pernicious anaemia or confirmed deficiency, as untreated B12 deficiency can lead to irreversible neurological damage
This accelerated weight loss is leading to demand for body contouring and facial rejuvenation
Some of the most common side effects from clinical trials include: Headache (2538%) Nausea (2158%) Trouble sleeping (1524%) Weakness (1620%) Dizziness (1124%) Ejaculation disorder (219%) Sleepiness or drowsiness (1226%) Dry mouth (1222%) Sweating (719%) Loss of appetite (1517%) Nervousness (1726%) Constipation (915%) Delayed, infrequent or absent orgasms (513%) Other less serious side effects of venlafaxine that have been reported include: Weight loss (16%) Vision changes such as blurred vision (46%) Hypertension (high blood pressure) (25%) Impotence (46%) Tingling or numbness (23%) Tremor (110%) Vomiting (38%) Weight gain (2%) Gas (34%) Itching (1%) Yawning (38%) Indigestion (57%) Twitching (13%) Dilated pupils (2%) Most of these side effects will resolve on their own

Ann N Y Acad Sci 1053:153161 Zaitone SA, Abo-Elmatty DM, Shaalan AA (2012) Acetyl-l-carnitine and alpha-lipoic acid affect rotenone-induced damage in nigral dopaminergic neurons of rat brain, implication for Parkinsons disease therapy
We also found S-nitrosylation of the voltage-dependent anion-selective channel protein 2 (VDAC2) in the Shank3 mutant mice [64]