Running independently, the Drug Effects System tracks every player’s substance use. Each item comes with its own custom animation, concentration value, and unique effects, such as increased speed, stamina, health, and more. As substance concentration levels rise in the player’s body, these effects escalate - from blurred vision and blackouts to hallucinations with nearby NPCs, accompanied by unsettling sound effects like a racing heartbeat and whispering voices. The data is saved, so when players leave and rejoin the server, their effects persist until they naturally fade over time.

To perform a test, the player holds a button to spit into the funnel, triggering the analysis. From the start, an animation shows the saliva moving along the paper strip, and shortly after, red lines appear against each corresponding drug indicator with a smooth fade-in effect, making the procedure feel lifelike and engaging.

Each test comes with a control area labeled C and indicators for Methamphetamine, Amphetamine, Tetrahydrocannabinol, Opiate, Benzodiazepine, and Cocaine. If all lines are visible, the result is negative; if the control lines are visible but a substance line is missing, the result is positive for that drug. Occasionally, a test may be invalid if any control line is missing, requiring a new detector to retest the suspect.

For inventories that support metadata, after performing a test the officer receives a used drug detector item. It stores the names of both the officer and the tested player, the result, and the date, ensuring every inspection is properly documented and traceable.