How does LSD induce short-term psychosis but long-term optimism?

When most people think of LSD (lysergic acid diethylamide) ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­the image that comes to mind is hallucinating hippies at Woodstock, but the drug’s original use was psychotherapeutic. As early as the ’60s, researchers showed that LSD reduces depression, anxiety and [...]