Evidence-based·Last reviewed May 30, 2026·How we grade evidence

Corydalis

Botanical

Useful mainly for adults seeking a traditional adjunct for chronic or mild pain.

Quick decision guide

May help most

adults seeking a traditional adjunct for chronic or mild pain

Common dosing range

100–500 mg extract, or 5–10 g dried rhizome as decoction

When to expect effects

Hours (for pain)

Watch out for

Sedating; can add to opioids, sedatives, and alcohol — avoid before driving

What is it

Corydalis (Corydalis yanhusuo, Yan Hu Suo in Chinese) is a perennial flowering plant whose tuberous rhizome is used in Traditional Chinese Medicine primarily for pain management. It contains alkaloids related to those in opium poppy but with a different pharmacological profile.

Is it worth it for you?

Use this as a quick fit check, not a diagnosis.

Worth considering if…

You want a traditional adjunct for chronic or low-grade pain
You accept mostly preclinical evidence with small human signals
You can avoid driving and combine cautiously with other CNS drugs

Probably skip if…

You take opioids, sedatives, or psychiatric medication without clinician oversight
You are pregnant or have liver disease
You need a validated, standardized analgesic

Evidence at a glance

pain relief

Mixed Evidence
Effect
Modest
Best fit
adults with chronic or low-to-moderate pain
Time
Hours

anxiety and sleep

Mixed Evidence
Effect
Uncertain
Best fit
not established
Time
Not established

Evidence for 2 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

pain relief

Supplement benefit
Mixed Evidence

Corydalis alkaloids such as dehydrocorybulbine and tetrahydropalmatine modulate dopamine and opioid receptors, and preclinical work shows analgesia with less tolerance than opioids. Human data are limited to small trials in headache and chronic pain suggesting modest benefit, so the clinical evidence remains preliminary.

Effect size
Modest
Time to effect
Hours
Best fit
adults with chronic or low-to-moderate pain
Less likely
people with severe acute pain needing standard analgesia

Bottom line: Plausible mild analgesic with promising pharmacology but only preliminary human trials.

SourceYuan et al., 2004 — PubMed

anxiety and sleep

Mechanism only
Mixed Evidence

Tetrahydropalmatine has sedative and possibly anxiolytic activity in preclinical models, consistent with the drowsiness users report. No controlled human trials support corydalis for anxiety or insomnia.

Effect size
Uncertain
Time to effect
Not established
Best fit
not established

Bottom line: Sedation is real anecdotally, but there is no trial support for treating anxiety or sleep disorders.

SourceLee et al., 2014 — PMC

How it works

Corydalis tubers contain over 40 alkaloids, with dehydrocorybulbine (DHCB), tetrahydropalmatine (THP), corydaline, and various protoberberine alkaloids being the most studied. These alkaloids interact with multiple receptor systems including dopamine receptors (D1 and D2), opioid receptors, and GABA receptors. In TCM, Corydalis is used for pain syndromes including dysmenorrhea, abdominal pain, chest pain, and trauma-related pain. Modern preclinical research suggests its analgesic effects involve dopamine receptor modulation (particularly D2 antagonism) and opioid receptor activity, with less tolerance and addiction potential than opioids. Some clinical trials in headache and chronic pain have shown modest benefit. THP also has sedative and possibly anxiolytic effects.

How to take it

1. Typical dose
100–500 mg standardized extract, or 5–10 g dried rhizome as a decoction
2. Timing
As needed or 2–3 times daily; evening dosing is often more comfortable due to sedation
3. With food
Either
4. How long to try
Short trials; long-term safety data are limited

What to track

pain intensity
daytime drowsiness
any GI upset or dry mouth

3 commercial forms

Compare the main delivery options and what they’re best suited for.

Dried rhizome (Yan Hu Suo)

Used in traditional Chinese herbal practice.

Traditional decoction form; vinegar-processed forms have enhanced alkaloid extraction.

Standardized extract (capsules)

Modern Western supplement form.

Concentrated; sometimes standardized to total alkaloids or THP content.

Tetrahydropalmatine (THP) isolated

Concentrated form of one of the main alkaloids; used in some specialty supplements.

Single active alkaloid for analgesic and sedative use.

Safety

Know the common side effects, key cautions, and who should avoid it.

Common side effects

drowsinessdry mouthmild GI upset

Serious risks

  • rare case reports of liver injury, possibly from contamination or adulteration

Who should avoid it

  • pregnant women
  • people with liver disease (concentrated extracts)
  • those on opioids, sedatives, or psychiatric medication without clinician oversight

Pregnancy & breastfeeding

Avoid; corydalis carries a traditional contraindication in pregnancy.

Interactions

opioids, sedatives, alcohol, and other CNS depressantsMajor

additive sedation and CNS depression

dopaminergic drugs (levodopa, antipsychotics)Moderate

tetrahydropalmatine modulates dopamine receptors

antihypertensivesMinor

theoretical additive blood-pressure effects

Choosing a product

What to look for on the label — and what to be skeptical of.

Look for…

species identified as Corydalis yanhusuo
total alkaloid or THP standardization
third-party purity testing for contaminants

Be skeptical of…

non-addictive painkiller as good as opioids
cures chronic pain

Frequently asked questions

Is corydalis like opioids?⌄

It interacts with opioid receptors but also with dopamine receptors, giving it a different profile. Preclinical evidence suggests less tolerance and dependence than opioid drugs.

Is corydalis safe?⌄

Generally well tolerated at traditional doses. Sedation, dry mouth, and possible drug interactions are the main concerns. Avoid in pregnancy and with sedating medications.

Does corydalis really help pain?⌄

Traditional and limited modern evidence support analgesic use. It is not as potent as prescription opioids but may help mild to moderate pain with potentially fewer addiction concerns.

References by claim

pain relief

Yuan et al., 2004 — PubMed (2004) link

anxiety and sleep

Lee et al., 2014 — PMC (2014) link

Track Corydalis with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

Coming to App Store
Evidence-based·Last reviewed May 30, 2026·Evidence current as of May 30, 2026·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.