53397
Additionally , many drugs of abuse such as cocaine and methylphenidate possess NRI activity , though it is important to mention that NRIs without combined dopamine reuptake inhibitor ( DRI ) properties are not significantly rewarding and hence are considered to have a negligible abuse potential .
 drugs of abuse
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 drugs of abuse