Is 7-OH an opioid?

Short answer: not classified as one legally in the same category as drugs like heroin or oxycodone, but concentrated 7-OH acts on the same opioid receptors in the brain, strongly enough that withdrawal from it commonly feels like opiate withdrawal.

Why it feels like opiate withdrawal

7-hydroxymitragynine binds to mu-opioid receptors — the same receptor system that drugs like morphine, oxycodone, and heroin act on. In concentrated extract form, that binding is reportedly far stronger than raw kratom leaf, which is why people describe stopping it as feeling like classic opiate withdrawal: body aches, restlessness, GI symptoms, and disrupted sleep, rather than the milder experience some describe from traditional kratom tea.

Why the legal answer is more complicated

Kratom and 7-OH have historically existed in a regulatory gray area — not scheduled the way traditional opioids are, which is part of why concentrated extract products became so widely available in the first place. That's actively changing: 2026 has brought a federal scheduling action targeting concentrated 7-OH specifically, plus a growing number of state-level bans. See News & legal updates for what's changed most recently — this page won't stay current on legal status by itself, since it's changing fast.

What this means if you're stopping

Opioid-pattern withdrawal can include dehydration risk from GI symptoms and significant sleep/mood disruption — see What withdrawal can look like and Hydration & nutrition. If you have a history of seizures, heart conditions, are pregnant, or use other substances alongside 7-OH, talk to a doctor before you stop — see the Safety page for what to do if something feels like an emergency.