Can pathological narcissism be induced by substance abuse or biochemical imbalances in the brain?
The narcissist’s moods change abruptly in the wake of a narcissistic injury. One can easily manipulate the moods of a narcissist by making a disparaging remark, by disagreeing with him, by criticising him, by doubting his grandiosity or fantastic claims, etc.
Such REACTIVE mood shifts are not provoked by the fluctuations in the narcissist’s body chemistry (for instance, his blood sugar levels), or with the presence or absence of any substance or chemical in his brain. It is possible to reduce the narcissist to a state of rage and depression AT ANY MOMENT, simply by employing the above “technique”. He can be elated, even manic – and in a split second, following a narcissistic injury, depressed, sulking or raging.
The opposite is also true. The narcissist can be catapulted from the bleakest despair to utter mania (or at least to an increased and marked feeling of well-being) by being provided with the flimsiest Narcissistic Supply (attention, adulation, etc.).
These swings are totally correlated to external events (narcissistic injury or Narcissistic Supply) and not to cycles of hormones, enzymes, neurotransmitters, sugar, or other substances in the body.