Drugs A - Z
American pawpaw (Asimina triloba)
Generic Name: Annona
CategoryHerbs & Supplements
Acetogenin, alkaloids, American paw paw, annomontacin, Annonaceae (family), Annonaceous acetogenins, Annona cherimola, Annona diversifolia, Annona glabra, Annona muricata, Annona palustris, Annona purpurea, Annona reticulata, Annona squamosa, Annona squamosa X A. cherimola, Annona triloba L., annonacin, annonacin-A, asimicin, asimin, Asimina incarna, Asimina longifolia, Asimina obovata, Asimina parviflora, Asimina pygmaea, Asimina reticulata, Asimina tetramera, Asimina triloba (L.) Dunal, Asimina X nashii, asiminacin, asiminecin, asiminocin, asimitrin, asimilobin, asitrocin, asitrilobins, atemoya, benzyltetrahydroisoquinolone alkaloids, biriba, Brazilian pawpaw, bullanin, bullatacin, bullatacinone, bullatetrocin, bulletin, Carica papaya, cherimoya, coumaroyltyramine, custard apple, Deeringothamnus rugelii, Deeringothamnus puchellus, Disepalum, dog banana, dwarf pawpaw, feruloyltyramine, flag pawpaw, flavonoids, gigantetrocinone, Goniothalanus, graviola, guanabana, Hoosier banana, ilama, Indiana banana, isoannonacin, murisolinone, nicotiflorine, octanoate, opossum pawpaw, Ozark banana, papaya, paw paw, Paw Paw Cell-Reg®, poor man's banana, prairie banana, Rollinia mucosa, rutin, soncoya, soursop, squamolone, sugar apple, sweetsop, syringaresinol, trilobacin, trilobalicin, Uvaria, West Virginia banana, xylomaticin, Xylopia.
Note: American pawpaw (Asimina triloba) is not a papaya and should not be confused with Carica papaya or Annona muricata (graviola) although the species have similar common names and may be called "pawpaw."
American pawpaw (Asimina triloba) is a fruiting tree native to North America. However, plantings of the tree can be found in Asia, Australia, and Europe. Pawpaw extract is made from the twigs of the tree.
In the 1980s and 1990s, researchers at Purdue University isolated compounds from pawpaw bark extracts. Many of these compounds were found to have cytotoxic effects on cancer cell lines. Currently, there is a lack of available scientific evidence supporting the safety or effectiveness of pawpaw for any condition.
EvidenceDISCLAIMER: These uses have been tested in humans or animals. Safety and effectiveness have not always been proven. Some of these conditions are potentially serious, and should be evaluated by a qualified healthcare provider.
Pawpaw extract may have some anticancer activity, but additional study is needed to make a firm recommendation.
Pawpaw extract in combination with thymol and tea tree oil in a shampoo formulation may be effective for the eradication of lice. Better-quality study using pawpaw alone is needed before a firm recommendation can be made.
TraditionWARNING: DISCLAIMER: The below uses are based on tradition, scientific theories, or limited research. They often have not been thoroughly tested in humans, and safety and effectiveness have not always been proven. Some of these conditions are potentially serious, and should be evaluated by a qualified healthcare provider. There may be other proposed uses that are not listed below.
Antibacterial, antifungal, anti-inflammatory (for the mouth and throat), antiprotozoal, antiviral, emetic (induced vomiting), fat substitute, fever reducer, food uses, insecticide (nematodes), pesticide, scarlet fever, skin rashes.
Adults (18 years and older)
Dosing from scientific studies has not been proven safe or effective. For cancer, 12.5-50 milligrams of extract has been taken by mouth four times a day with food for periods of up to 18 months. For lice, 40 milliliters of Paw Paw Lice Remover Shampoo® (0.5% pawpaw extract, 1% thymol, and 0.5% tea tree oil) applied three times to dry hair, once every 8 days for up to 24 days, has been used.
Children (younger than 18 years)
Dosing from scientific trials has not been proven safe or effective. For lice, 40 milliliters of Paw Paw Lice Remover Shampoo® (0.5% pawpaw extract, 1% thymol, and 0.5% tea tree oil) applied three times to dry hair, once every 8 days for up to 24 days, has been used.
SafetyDISCLAIMER: Many complementary techniques are practiced by healthcare professionals with formal training, in accordance with the standards of national organizations. However, this is not universally the case, and adverse effects are possible. Due to limited research, in some cases only limited safety information is available.
Avoid in individuals with a known allergy or hypersensitivity to Asimina triloba, or any other members of the Annonaceae plant family (including other species of Asimina, and those in the genera Annona, Deeringothamnus, Disepalum, Goniothalanus, Rollinia, Uvaria, and Xylopia).
Side Effects and Warnings
There is a lack of safety information about pawpaw extracts. The constituents in pawpaw extract are cytotoxic. Taking pawpaw extract by mouth is not recommended without the supervision of a qualified healthcare professional, including a pharmacist.
Patients with gastrointestinal problems or a history of skin reactions should use pawpaw cautiously, because both nausea and vomiting have been reported after taking pawpaw by mouth.
Patients with known allergy or hypersensitivity to Asimina triloba, or any other members of the Annonaceae plant family should avoid pawpaw due to the possibility of developing urticaria ("hives"), reddening of the skin or itching.
Pregnancy and Breastfeeding
Interactions with Drugs
Pawpaw extracts may interact with antioxidant medications. Caution is advised.
Interactions with Herbs and Dietary Supplements
The combined use of 7-keto and pawpaw extract may lessen the effect of 7-keto and combined use of these agents may be ineffective. Patients taking herbs and supplements should consult with a qualified healthcare professional, including a pharmacist, before combining therapies.
Pawpaw may interact with coenzyme Q10. It may also interact with antioxidant herbs and supplements. Caution is advised.
This information is based on a professional level monograph edited and peer-reviewed by contributors to the Natural Standard Research Collaboration (www.naturalstandard.com): Antoinette Edmondson, PharmD (Massachusetts College of Pharmacy); Nicole Giese, MS (Natural Standard Research Collaboration); Toni M. Schaeffer, PhD, PharmD (Albany College of Pharmacy); Shaina Tanguay-Colucci, BS (Natural Standard Research Collaboration); Wendy Weissner, BA (Natural Standard Research Collaboration).
BibliographyDISCLAIMER: Natural Standard developed the above evidence-based information based on a thorough systematic review of the available scientific articles. For comprehensive information about alternative and complementary therapies on the professional level, go to www.naturalstandard.com. Selected references are listed below.
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Caparros-Lefebvre D, Elbaz A. Possible relation of atypical parkinsonism in the French West Indies with consumption of tropical plants: a case-control study. Caribbean Parkinsonism Study Group. Lancet 7-24-1999;354(9175):281-286.
Haribal M, Feeny P. Combined roles of contact stimulant and deterrents in assessment of host-plant quality by ovipositing zebra swallowtail butterflies. J Chem Ecol. 2003;29(3):653-670.
He K, Zhao GX, Shi G, et al. Additional bioactive annonaceous acetogenins from Asimina triloba (Annonaceae). Bioorg.Med.Chem. 1997;5(3):501-506.
Kim EJ, Suh KM, Kim DH, et al. Asimitrin and 4-hydroxytrilobin, new bioactive annonaceous acetogenins from the seeds of Asimina triloba possessing a bis-tetrahydrofuran ring. J Nat Prod 2005;68(2):194-197.
Martin JM, Madigosky SR, Gu ZM, et al. Chemical defense in the zebra swallowtail butterfly, Eurytides marcellus, involving annonaceous acetogenins. J Nat Prod 1999;62(1):2-4.
McCage CM, Ward SM, Paling CA, et al. Development of a paw paw herbal shampoo for the removal of head lice. Phytomedicine 2002;9(8):743-748.
McLaughlin, JL. A novel mechanism for the control of clinical cancer: inhibition of the production of adenosine triphosphate (ATP) with a standardized extract of paw paw (Asimina triloba, Annonaceae) (Unpublished). 2001.
McLaughlin JL, Zeng L, Oberlies NH, et al. Annonaceous acetogenins as new natural pesticide: Recent progress In: Phytochemicals for pest control. 1997;119-133.
Woo MH, Cho KY, Zhang Y, et al. Asimilobin and cis- and trans-murisolinones, novel bioactive Annonaceous acetogenins from the seeds of Asimina triloba. J.Nat.Prod. 1995;58(10):1533-1542.
Woo MH, Chung SO, Kim DH. Asitrilobins C and D: two new cytotoxic mono-tetrahydrofuran annonaceous acetogenins from Asimina triloba seeds. Bioorg.Med.Chem. 2000;8(1):285-290.
Woo MH, Kim DH, McLaughlin JL. Asitrilobins A and B: cytotoxic mono-THF annonaceous acetogenins from the seeds of Asimina triloba. Phytochemistry 1999;50(6):1033-1040.
Wood R, Peterson S. Lipids of the pawpaw fruit: Asimina triloba. Lipids 1999;34(10):1099-1106.
Ye Q, He K, Oberlies NH, Zeng L, et al. Longimicins A-D: novel bioactive acetogenins from Asimina longifolia (annonaceae) and structure-activity relationships of asimicin type of annonaceous acetogenins. J Med Chem 4-26-1996;39(9):1790-1796.
Zhao GX, Chao JF, Zeng L, et al. The absolute configuration of adjacent bis-THF acetogenins and asiminocin, a novel highly potent asimicin isomer from Asimina triloba. Bioorg.Med.Chem. 1996;4(1):25-32.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.