The signs and symptoms of using ecstasy can include:
Increased blood pressure and pulse rate
Dilated pupils
Raised body temperature
Sweating
Loss of appetite
Jaw clenching
Nausea
Nervousness
Confusion
Teeth grinding
Vomiting
Hallucinations
Tremors
Insomnia
Panic
Visual distortions

The consequences of using ecstasy may include:
Chronic sleep problems
Cracked teeth through grinding
High blood pressure
Dehydration
Anxiety
Decreased emotional control
Lethargy
Severe depression
Memory impairment
Nerve cell damage
Serotonin syndrome
Death from heart failure
Rhabdomyolysis – overheating to the point