“Drugs like psilocybin that induce psychedelic effects have shown promise for treating depression. Now, a review of the evidence suggests that they are effective, but no more so than traditional antidepressants”

So, you could also say “…evidence suggests that they are as effective as traditional antidepressants”

https://www.newscientist.com/article/2519824-psychedelics-may-be-no-better-than-antidepressants-for-depression/

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