I can only speak for myself here, but I don't take meds to be happy. I take them to function. I get happiness and joy from experiencing life, as the article suggests. Happiness is not created by taking in chemicals, ask any recovering addict.
Stimulation such as dancing, laughing, causes the brain to create endorphines, which give us a natural high and lift our moods. Now, if they could bottle endorphines, I would totally sign up for that. LOL.