Examples of Price Elasticity of Demand. If the quantity purchased changes more than price change (say, 10%/5%), the product is termed elastic. If the change in quantity purchased is the same as the price change (say, 10%/10% = 1), the product is said to have unit (or unitary) price elasticity.
Wellbutrin had side effects at the beginning-the worst of which were insomnia and constipation. The insomnia abated after about 3 weeks of treatment and I take a fiber supplement to deal with the constipation. It also abates with time but never completely goes away.
Bupropion (wellbutrin) is an 'atypical antidepressant' It increases norepinephrine and dopamine. It is used often as a smoking cessation aid because nicotine causes in increase in dopamine and norepi. So the wellbutrin does not increase serotonin, which can be attributed to you not sleeping well and being jittery.