Continuous exposure can cause CNS depression including euphoria and disorientation. Khat consumption induces mild euphoria and excitement, similar to that conferred by strong coffee. It includes more specific mental states such as happiness, entertainment, enjoyment, ecstasy and euphoria. Derailment can often be manifestly caused by intense emotions such as euphoria or hysteria. It is a stimulant, inducing slight dizzines followed by euphoria and alertness. Acute effects while under the influence can include euphoria and anxiety. Users experience a powerful feeling of euphoria and energy breaks. The finance industry was in a state of increasing optimism that approached euphoria. Also memantine seems to lack effects such as euphoria or hallucinations. Opioids produce analgesia and often feelings of euphoria in users. It is a state characterized by euphoria and/or an irritable mood. Recreational users report that a barbiturate high gives them feelings of relaxed contentment and euphoria. Some are also capable of inducing feelings of euphoria (a happy sensation). It can bring a sense of euphoria and relaxation. A euphoriant is a type of psychoactive drug which tends to induce euphoria.