may include: - Dizziness - Mild to severe irritation - Occasional heart pain - Elevated blood pressure - Erections (if over 4 hours seek medical attention - if over 2 hours well done) - Sleeplessness - Rash or impulsive behavior - Increased sensitivity - Loss or increase of appetite - Emotional outbursts - Dry mouth - Inability to speak or think coherently *Prolonged exposure may result in dependency or addiction