I too lost weight the first few weeks of starting Effexor. I too felt \"overjoyed\"/euphoric with this abundance of energy, however, it DOESN\'T LAST! You will gain the lost weight back and then some. You will become so tired/lethargic/apathetic that nothing will matter except sleep, especially when your doctor increases your dose. Then when you miss a dose or get ready to come off you\'ll realize what all of us on the internet are trying to get through to people! Don\'t bother talking to your doctor about it because they have NO CLUE. I wish Effexor was some kind of wonder drug but it RUINS PEOPLE\'s LIVES so that the manufacturer can make Billions. Please do some more research before continuing it\'s usage. The longer you are on it and the higher your dose, the harder it is to quit. Effexor IS ADDICTIVE and its withdrawals have been compared to heroin.