For generalized anxiety aisorder, medications such as are for the short-term relief of symptoms, while are effective for longer term treatment

Effective medications include GABA stimulants such as the benzodiazapines and buspirone for short-term treatments. 
-Antidepressants, especially the SSRIs, may be more helpful both in the longer term and with concomitant depression
-Psychotherapy for GAD can be helpful as well, and appears to be at least as effective as pharmacological treatment. 
-There is some disagreement about the effectiveness of CBT in controlled clinical trials. 
--Some literature reviews found CBT to be helpful in the short-term for GAD, but lacked evidence of sustained improvement 
--Others indicate CBT is consistently clinically effective for both anxiety and depression

Digestion because it removes waste