Source:http://linkedlifedata.com/resource/umls/id/C0870371
CSP: intense desire to satisfy the inner need for something; for example drug, food, activity, etc; coordinate with desired subject.,NCI: The desire to experience the effect(s) of a previously used psycho-active substance. It has to be noted that not all drug craving is based on withdrawal, since craving can often occur in the absence of withdrawal.