In your role as a police officer, you sometimes come across individuals who seem to be hallucinating and have delusions of persecution. in addition to the possibility that these individuals may have a mental disorder or be under the influence of various hallucinogenic drugs, you must also consider the possibility of

Amphetamine use

Amphetamines are stimulant drugs which speed up the messages travelling between the brain and the body. High doses and frequent heavy use of amphetamine can create a psychosis symptom known as ‘amphetamine psychosis’. This symptom is characterised by paranoid delusions, hallucinations and out of character aggressive or violent behavior. The symptoms usually disappear a few days after the person stops using amphetamines.

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.