The signs and symptoms of using cocaine can include:

• Anxiety
• Increased heart rate
• Aggression
• Dilated pupils
• Chest pain
• Overheating and sweating
• Nose bleeds
• Paranoia
• Lethargy
• Agitation
• Hallucinations
• Reduced appetite
• Muscle twitches
• Tremors
• Nausea and vomiting

The consequences of using cocaine may include:

• Depression
• Nasal and sinus congestion
• Cardiomyopathy – a serious disease in which the heart muscle becomes inflamed
• Cocaine psychosis
• Violent or erratic behaviour
• Eating and sleeping disorders
• Impaired sexual performance
• Ulceration of the mucous membrane of the nose
• Damage to the nasal septum
• Cardiac arrest
• Convulsions
• Kidney failure
• Stroke
• Seizures
• High risk of dependence (addiction), especially if injected
• HIV and hepatitis infections through needle sharing