L-THP
Levo-tetrahydropalmatine, a dopamine-receptor-blocking alkaloid from Corydalis used in China as a sedative and pain reliever; liver toxicity has been reported.
Approved in China; not approved in the US.
Look it up on Wikipedia1 listing across 1 independently tested vendor, ranked by price per milligram after coupon codes anyone can use. Vendors you can only order from by message are hidden.
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Daily price tracking started October 7, 2026; a price-history chart appears here once a few days have been collected.
| Vendor | Trust | Listing | Vials | Price | Per mg | |
|---|---|---|---|---|---|---|
Modern Aminos Affiliate #125 by metascore · US |
Metascore 75 medium confidenceFinnrick 79%PepIndex 81/100Bought vials 100% of label · 5 testsTitrateLab · PeptideBase · Peptide CriticNo report for thisOnline checkout |
L-THP (Levo-tetrahydropalmatine) $30 off through this site's link (new customers) |
60 × 50 mg = 3000 mg | $39.00 $30 off through this site's link (new customers) $0.65 per vial |
$0.013 | Buy |
Mixing a 50 mg vial
What each common amount of bacteriostatic water gives you on a U-100 insulin syringe. Pick a vial size above to change it.
| Water | Strength | Per 10 units (0.1 mL) | Per unit |
|---|---|---|---|
| 1 mL | 50 mg/mL | 5,000 mcg | 500 mcg |
| 2 mL | 25 mg/mL | 2,500 mcg | 250 mcg |
| 3 mL | 16.667 mg/mL | 1,666.7 mcg | 166.67 mcg |
| 5 mL | 10 mg/mL | 1,000 mcg | 100 mcg |
Discussions elsewhere
Experiences and questions about L-THP on other sites. Treat anecdotes with care.
L-THP: questions people ask
What is L-THP?
Plant alkaloid (small molecule). Levo-tetrahydropalmatine, a dopamine-receptor-blocking alkaloid from Corydalis used in China as a sedative and pain reliever; liver toxicity has been reported.
How much does L-THP cost?
The cheapest L-THP from an independently tested vendor is $0.013 per mg (Modern Aminos, L-THP (Levo-tetrahydropalmatine), $39.00). Across 1 listings from 1 vendors the median is $0.013 per mg.
Where can I buy L-THP?
1 vendors tested by Finnrick sell L-THP. The cheapest per mg right now: Modern Aminos ($0.013). 0 of them publish a lab report (COA) for L-THP; compare lab scores and reports in the table above before buying.
Is L-THP FDA approved?
Approved in China; not approved in the US.