One of the ongoing debates about this entire class of medications is whether the effects are mediated solely by weight loss and mitigation of the inflammatory consequences of energy toxicity (read: too many calories) versus other biological effects of these medications
It can cause vision changes for a little while after you start taking it
Lin AW, Barradas M, Stone JC, van Aelst L, Serrano M, Lowe SW
Obes Facts 15:321335 Iozzo P, Guiducci L, Guzzardi MA, Pagotto U (2012) Brain PET imaging in obesity and food addiction: current evidence and hypothesis
e421 Yang WS, SriRamaratnam R, Welsch ME, Shimada K, Skouta R, Viswanathan VS, et al