What drug might cause someone to exhibit panic, suspicion, paranoia, confusion, and agitation to the point of possible violence?

The symptoms described—panic, suspicion, paranoia, confusion, and agitation leading to potential violence—are most commonly associated with the use of amphetamines. Amphetamines are stimulants that can lead to heightened states of anxiety and agitation. When someone consumes high doses, or if they have a long-term dependence, they may experience severe psychological effects, including paranoia and confusion. This can sometimes escalate to aggressive behavior or violence, particularly if the individual feels threatened or cornered.

Both cocaine and amphetamines are stimulants, and while cocaine can cause similar symptoms, the specific intensity and chronic nature of the reactions described are more closely aligned with amphetamine use, especially in cases of overdose or prolonged use. Alcohol typically results in a depressive effect and does not align with the symptoms of paranoia and agitation described here. Marijuana may cause anxiety in some individuals but is less likely to lead to such severe agitation or violent behavior.

Understanding the effects of various substances on mental health is crucial for recognizing the potential dangers related to their misuse and for providing appropriate intervention.