Researchers warn there's still barriers preventing people accessing magic mushroom medication, despite recent changes

Psilocybin remains unapproved, but a Christchurch psychiatrist can now prescribe it for treatment-resistant depression - outside clinical trials.

Medsafe has also approved Melatonin for over-the-counter sales at pharmacies.

Auckland University Professor Suresh Muthukumaraswamy says authorisation is good, but there needs to be funding in place.

He says there's a lot of psychotherapy involved in the treatment which becomes very expensive.