Passionflower Dr. Lisa Watson 26 September 2013 Passionflower - Plant medicine for anxiety, insomnia and addiction By: Lisa Watson BHSc, ND Integrative Health Institute 46 Sherbourne Street, 2nd Floor Toronto, ON M5A 2P7 www.integrativehealthinstitute.ca www.drlisawatson.com Jump to: Part 1 Part 2 Part 3Part 4 Part 1: Passionflower and Anxiety The beautiful purple passionflower is renowned as an ornamental flower, but it has been touted as an effective herbal medicine in cultures around the globe for centuries.(1) The Aztecs of Mexico and South America used passionflower as a sedative and nerve tonic, a use which the Spanish conquistadors took back to Europe where use of passionflower has flourished.(2) This article will focus on the use of passionflower for neurological concerns – specifically anxiety, insomnia and addiction. An overview of the appropriate use of passionflower, dosing and use in special populations will conclude our discussion of this stunning botanical. Anxiety disorders, such as generalized anxiety disorder (GAD), panic disorder, obsessive-compulsive disorder and posttraumatic stress disorder, are the most common mental health problems seen by doctors.(3) Over half of people with anxiety disorders seek relief from complementary and alternative therapies including relaxation techniques, homeopathy and botanical medicines.(4) In the treatment of generalized anxiety disorder passionflower has been found to be as effective as oxazepam (a benzodiazepine). In a groundbreaking study, researchers found that over four weeks both passionflower and oxazepam were equally effective in managing symptoms of anxiety. Passionflower was considered to be superior as a therapy compared to the oxazepam because of a lower incidence of negative side effects, primarily impairment of job performance.(5) Studies of patients undergoing anxiety-provoking surgical procedures have also demonstrated the anti-anxiety effects of passionflower. Patients undergoing surgery to repair hernias had decreased anxiety scores 10 minutes and 30 minutes after receiving a single oral dose of passionflower. They experienced no sedative side effects, which is an important consideration in a pre-surgical situation.(6) Similar anti-anxiety effects were seen in a study using passionflower prior to spinal anesthesia, again with no increase in sedation.(7) Emerging research points to a potential mechanism of action for the anxiety-reducing effects of passionflower. The neurotransmitter gamma-aminobutyric acid (GABA) has been implicated in the progression of anxiety disorders and has been the focus of pharmaceutical treatments such as the benzodiazepine drugs.(3,8) Animal studies have shown that passionflower is able to bind to GABA receptors and modulate the action of this calming neurotransmitter.(1, 9-12) This may be due to the GABA content of passionflower, the highest level of 21 plants tested,(13) or due to another compound found in passionflower such as the bioflavonoid chrysin.(9) In contract to benzodiazepines, passionflower does not have the negative side effect profile association with both short and long term use. Benzodiazepines can lead to significant daytime sedation and confusion, and have been associated with withdrawal symptoms after sudden discontinuation.(3) The Food and Drug Administration classifies passionflower as “generally regarded as safe” and studies of passionflower in humans find it to be well-tolerated and without significant side effects such as drowsiness or motor impairment.(2) Passionflower offers an important alternative in the treatment of anxiety disorders, a condition for which many people are seeking non-pharmaceutical treatment options. Further research is warranted, but traditional use and preliminary studies are overwhelmingly positive. Part II of this article will look at another traditional use of passionflower, insomnia. References : 1. Appell K, Rose T, Fiebich B, Kammler T, Hoffman C, Weiss G. Modulation of the gamma-aminobutric acid (GABA) system by Passifloraincarnata L. Phytother Res. 2011;25(6):838-43. 2. Traub M. Passionflower (Passiflora): An overview of the research and clinical indications. [cited 2013 Feb 10]. [13 p.]. Available from: http://www.integrativemedicalinitiatives.com/imsp/presentations-2012-20… 3. Kavan MG, Elsasser GN, Barone EJ. Generalized anxiety disorder: Practical assessment and management. AmFam Physician. 2009;79:785-91. 4. Kessler RC, Soukup J, Davis RB, Foster DF, Wilkey SA, Van Rompay M, Eisenberg DM. The use of complementary and alternative therapies to treat anxiety and depression in the United States. Am J Psychiatry. 2001;158:289-94. 5. Akhondzadeh S, Naghavi HR, Vazirian M, Shayeganpour A, Rashidi H, Khani M. Passionflower in the treatment of generalized anxiety: a pilot double-blind randomized controlled trial with oxazepam. J ClinPharmTher. 2001;26:363-7. 6. Movafegh A, Alizadeh R, Hajimohamadi F, Esfehani F, Nejatfar M. Preoperative oral Passiflora incarnata reduces anxiety in ambulatory surgery patients: A double-blind, placebo-controlled study. AnesthAnalg. 2008;106(6):1728-32. 7. Aslanargun P, Cuvas O, Dikmen B, Aslan E, Yuksel MU. Passiflora incarnate Linneaus as an anxiolytic before spinal anesthesia. J Anesth. 2012;26(1):39-44. 8. Larzelere MM, Campbell JS, Robertson M. Complementary and alternative medicine usage for behavioral health indications. Prim Care Clin Office Pract. 2010;37:213-36. 9. Brown E, Hurd NS, McCall S, Ceremuga TE. Evaluation of the anxiolytic effects of chrysin: A Passiflora incarnate extract, in the laboratory rat. AANA J. 2007;75: 333-7. 10. Elsas SM, Rossi DJ, Raber J, White G, Seeley CA, Gregory WL, et al. Passifloraincarnata L. (Passionflower) extracts elicit GABA currents in hippocampal neurons in vitro, and show anxiogenic and anticonvulsant effects in vivo, varying with extraction method. Phytomedicine. 2010;17(12):940-49. 11. Dhawan K, Dhawan S, Chhbara S. Attenuation of benzodiazpeine dependence in mice by a tri-substituted benzoflavone moiety of PassifloraincarnataLinnaeaus: A non-habit forming anxiolytic. J PharmPharmaceut Sci. 2003;6(2):215-22. 12. Dhawan K, Kumar S, Sharma A. Anxiolytic activity of aerial and underground parts of Passifloraincarnata. Fitoterapia. 2001;72:922-6. 13. Carratu B, Boniglia C, Giammarioli S, Mosca M, Sanzini E. Free Amino Acids in Botanicals and Botanical Preparations. J Food Sci. 2008;73(5):C323–C328. Passionflower - Plant medicine for anxiety, insomnia and addiction Part II: Passionflower and Insomnia By: Lisa Watson, BHSc, ND Integrative Health Institute 46 Sherbourne Street, 2nd Floor Toronto, ON M5A 2P7 www.integrativehealthinstitute.ca www.drlisawatson.com Insomnia is a major health concern in our modern society. With between 10-15% of adults and a similar percentage of teens experiencing sleep disturbances it is one of the most common conditions presented to both primary care physicians and specialists.(1, 2) Traditional herbalists have a wide variety of choices for the management of insomnia. Passionflower is listed in the German Commission E for the treatment of insomnia and nervous restlessness(3) and was approved in the United States as an over-the-counter sedative until 1978.(4) Sleep is a complex interplay of hormones, neurotransmitters and circadian rhythms in the brain.(5) Insomnia is an equally complex process with many potential causes and associated medical conditions. Insomnia is a common finding in people suffering from both anxiety and depression and many of the treatments for these conditions are being explored for their potential to treat insomnia. Gamma aminobutyric acid (GABA) is the most common inhibitory (calming) neurotransmitter in the brain and is a primary target for many sleep-inducing agents. By inducing production of GABA or by binding the GABA receptors the hyperarousal state of insomnia can be lessened and sleep can occur. The primary classes of medications that interact with GABA in the brain are benzodiazepines. They have been found to decrease time to initiate sleep and enhance sleep quality.(1) However, use of benzodiazepines for sleep dysfunction is not ideal due to associations with development of tolerance, abuse potential, morning-after sedation, and cognitive impairment.(6) Rebound insomnia, anxiety and irritability are all common symptoms associated with abrupt discontinuation of benzodiazepines.(1) Passionflower offers a way to impact the GABA receptor in the brain and enhance sleep without the negative side effects or development of tolerance. GABA is a prominent ingredient in the aerial parts of the passionflower plant. Not only does passionflower contain a high amount of GABA but it is also able to bind to GABA receptors and lead to a suppression of the hyperarousal state associated with insomnia.(7) Few studies have been performed assessing passionflower for insomnia specifically. One Australian study found that one cup of passionflower tea nightly significantly improved sleep quality compared to placebo but did not alter sleep latency (time to fall asleep). The authors suggest that the lack of effect may be due to the low dose (one cup vs. the standard dose of 3 cups).(8) Traditional herbalists suggest that passionflower is best indicated for relief of insomnia associated with nervous restlessness, anxiety or over-active mind preventing initiation of sleep.(9) The impact that passionflower exhibits on the GABA system of the brain suggests it holds promise as a non-addictive support for individuals with insomnia without the residual morning sedation associated with benzodiazepines. Part III of this article will explore the use of passionflower for another condition associated with anxiety and insomnia, addiction and substance withdrawal. References 1. Sullivan SS. Insomnia pharmacology. Med Clin N Am. 2010;94;563-580. 2. Roberts R, Roberts CR, Chan W. Persistence and Change in Symptoms of Insomnia among Adolescents. Sleep. 2008;31(2):177-184. 3. Blumenthal M, Busse WR, Goldberg A, et al. The Complete German Commission E Monographs. Boston, MA: Integrative Medicine Communications, 1998. 4. Brown, D. 1995. Encyclopedia of Herbs and Their Uses. New York: DK Publishing, Inc. 323. 5. Chokroverty S. Overview of sleep and sleep disorders. Indian J Med Res. 2010;131:126-40. 6. O’Brien CP. Benzodiazepine use, abuse, and dependence. J ClinPscyhiatry. 2005;66(Suppl 2):28-33. 7. Elsas SM, Rossi DJ, Raber J, White G, Seeley CA, Gregory WL, et al. Passifloraincarnata L. (Passionflower) extracts elicit GABA currents in hippocampal neurons in vitro, and show anxiogenic and anticonvulsant effects in vivo, varying with extraction method. Phytomedicine. 2010;17(12):940-49. 8. Ngan A, Conduit R. A double-blind, placebo-controlled investigation of the effects of Passifloraincarnata(passionflower) herbal tea on subjective sleep quality. Phytother Res. 2011;25(8):1153-9. 9. Hoffman D. Medical herbalism: the science and practice of herbal medicine. Rochester: Healing Arts Press; 2003. Passionflower - Plant medicine for anxiety, insomnia and addiction Part III: Passionflower in Addiction/ Substance Withdrawal By: Lisa Watson, BHSc, ND Integrative Health Institute 46 Sherbourne Street, 2nd Floor Toronto, ON M5A 2P7 www.integrativehealthinstitute.ca www.drlisawatson.com Addiction to alcohol, cigarettes, opiates, marijuana, prescription and recreational drugs has impacts beyond the physical damage they do to the body; there are far-reaching implications for families and communities as well.(1) Treatment of addiction is an important goal for the health of both individuals and society and requires a multifaceted approach for success. Treatment of addiction begins with detoxification. In this step drug ingestion is stopped and the body no longer receives the addicted substance. This step leads directly to withdrawal. Withdrawal is the acute-post drug taking illness and typically produces an intense variety of symptoms.(2) Withdrawal symptoms can include tremors, irritability, nausea, insomnia, high blood pressure, sweating, severe anxiety, depression and potentially seizures.(3) Once the symptoms of withdrawal subside lifestyle and psychiatric counselling are necessary to prevent relapse. Passionflower is demonstrating considerable promise in the treatment of the detoxification and withdrawal phases of addiction treatment. As a non-addictive natural therapy passionflower offers a safe alternative to some of the pharmaceuticals currently used for this purpose. A 2001 controlled trial of passionflower in the treatment of opiate (heroin) withdrawal found that combining passionflower with the standard pharmaceutical treatment (clonidine) significantly decreased withdrawal symptoms such as nausea, convulsions, anxiety and tremor compared to clonidine alone.(4) Animal studies have found that a constituent of passionflower decreased the intensity and severity of withdrawal symptoms associated with detoxification from nicotine. This study also found that passionflower prevented weight loss associated with withdrawal, a measure of stress or depression in animals.(5) The benzoflavone moiety of passionflower has also been used in animal studies of alcohol detoxification. In both acute and chronic administration the passionflower significantly decreased the expression of withdrawal effects and anxiety behaviour.(3) Marijuana addiction is another substance abuse problem that may respond to passionflower. A compound isolated from passionflower, when administered with cannabinoids, prevented the development of tolerance and dependence of cannibinoids in mice. Administration of the passionflower extract also decreased expression of withdrawal effects and countered the drug-induced sexual decline associated with the use of marijuana.(6) The use of passionflower as an integrative therapy during addiction treatment is promising based on preliminary animal studies. The non-addictive potential of passionflower and the low potential for interaction with pharmaceutical treatments make passionflower an ideal addition to the integrative care of addiction and further research should be encouraged. Passionflower has great potential in the treatment of diverse health concerns including anxiety, insomnia and addiction. Part IV of this article will address the dosage of passionflower, use in special populations and safety concerns. References 1. Health Canada. Canadian addiction survey (CAS): A national survey of Canadians’ use of alcohol and other drugs: Public opinion, attitudes and knowledge. 2006. 2. O’Brien CP, McLellan AT. Myths about the treatment of addiction. The Lancet. 1996;347:237-40. 3. Akhondzadeh S, Kashani L, Mobaseri M, Hosseini SH, Nikzad S, Khani M. Passionflower in the treatment of opiates withdrawal: a double-blind randomized controlled trial. J ClinPharmTher. 2001;26:369-373. 4. Dhawan K, Kumar S, Sharma A. Nicotine reversal effects of the benzoflavone moiety from PassifloraincarnataLinneaus in mice. Addict Biol. 2002;7(4):435-41. 5. Dhawan K, Kumar S, Sharma A. Suppression of alcohol-cessation-oriented hyper-anxiety by the benzoflavone moiety of PassifloraincarnataLinneaus in mice. J Ethnopharmacol. 2002;81:239-44. 6. Dhawan K, Kumar S, Sharma A. Reversal of cannabinoids (Δ9-THC) by the benzoflavone moiety from methanol extract of PassifloraincarnataLinneaus in mice: a possible therapy for cannabinoid addiction. J PharmPharmacol. 2002;54(6):875-81. Passionflower - Plant medicine for anxiety, insomnia and addiction Part IV: Passionflower; dosage and safety considerations By: Lisa Watson, BHSc, ND Integrative Health Institute 46 Sherbourne Street, 2nd Floor Toronto, ON M5A 2P7 www.integrativehealthinstitute.ca www.drlisawatson.com Passionflower is more than an ornamental flower; it is a botanical medicine with a long history and potential for a flourishing future. The Passiflora family contains more than 500 different plants.(1) The species that has been found to have the greatest medical potential is Passiflora incarnata Linnaeus.(2) For anti-anxiety purposes only the aerial portions of the passionflower plant should be used. The roots of the passionflower plant have no anti-anxiety effect. The leaves and stems are the most potent and an ideal passionflower product will contain only these parts.(3) Products that contain the whole plant may require higher doses for therapeutic effects. Passionflower contains many different active constituents, including alkaloids and flavonoids(4) and gamma aminobutyric acid (GABA).(5) While there is considerable speculation as to which compound is responsible for the action of the passionflower (chrysin, GABA, passiflorine, benzoflavone moiety) it is advisable to assume a synergistic effect of all the compounds as being ultimately responsible for the medicinal actions of this plant.(2,3,5-7) A study of the anti-anxiety effects of passionflower found that only the methanol-extracted plant exhibited anxiolytic effects.(3) For anxiety a methanol-extracted tincture or supplement may be considered superior while a water-based extract (tea or infusion) is less likely to be effective. Dosing of passionflower is dependent on the desired effect. Table 1. Suggested doses for passionflower Indication Dose of passionflower Comments Anxiety 1-4ml tincture (aerial parts only) two to three times daily A higher dose may be necessary if the whole plant extract is used Insomnia 1-4ml tincture (aerial parts only) in evening before bed 1 teaspoon dried herb (aerial parts only) infused in hot water one to three cups nightly High dose of the infusion may disrupt sleep due to need to urinate Addiction 1-4ml tincture (aerial parts only) two to four times daily A specific dosage range in humans has not been established. One study used 1ml three times daily with clonidine for heroin withdrawal(8) Safety Considerations Passionflower is classified as “generally regarded as safe” (GRAS) by the Food and Drug Administration. Passionflower does not interact with most medications. Theoretically it could interact with medications and supplements with sedative properties and enhance their effects and potential side effects.(10) Special Populations Passionflower may be unsafe during pregnancy due to potential uterine stimulating effects of some passionflower constituents.(10) Many herbalists consider it safe during pregnancy but caution is recommended. Passionflower is safe for use in children and adolescents at age-appropriate doses.(11) Passionflower is also safe for use in the elderly and may be a better choice than benzodiazepines, which have an increased risk of falls in the elderly.(12) In conclusion, we find that passionflower is an incredibly safe herb with great therapeutic potential for treating multiple nervous system impairments, specifically anxiety, insomnia and addiction. The ability to use passionflower in diverse populations and integratively with pharmaceutical medications makes this botanical medicine a valuable treatment option for three prevalent health concerns. References 1. Patel SS, Mohamed Saleem TS, Ravi V, Shrestha B, Verma NK, Gauthaman K. Passifloraincarnata Linn: A phytopharmacological review. Int J Green Pharm. 2009;3:277-80. 2. Traub M. Passionflower (Passiflora): An overview of the research and clinical indications. [cited 2013 Feb 10]. [13 p.]. Available from: http://www.integrativemedicalinitiatives.com/imsp/presentations-2012-20… 3. Dhawan K, Kumar S, Sharma A. Anxiolytic activity of aerial and underground parts of Passifloraincarnata. Fitoterapia. 2001;72:922-6. 4. Hoffman D. Medical herbalism: the science and practice of herbal medicine. Rochester: Healing Arts Press; 2003. 5. Carratu B, Boniglia C, Giammarioli S, Mosca M, Sanzini E. Free amino acids in botanicals and botanical preparations. J Food Sci. 2008;73(5):C323–C328. 6. Dhawan K. Drug/ substance reversal effects of a novel tri-substituted benzoflavone moiety (BZF) isolated from Passifloraincarnata Linn. – a brief perspective. Addict Biol. 2003;8(4):379-86. 7. Elsas SM, Rossi DJ, Raber J, White G, Seeley CA, Gregory WL, et al. Passifloraincarnata L. (Passionflower) extracts elicit GABA currents in hippocampal neurons in vitro, and show anxiogenic and anticonvulsant effects in vivo, varying with extraction method. Phytomedicine. 2010;17(12):940-49. 8. Akhondzadeh S, Kashani L, Mobaseri M, Hosseini SH, Nikzad S, Khani M. Passionflower in the treatment of opiates withdrawal: a double-blind randomized controlled trial. J ClinPharmTher. 2001;26:369-373. 9. Fisher AA, Purcell P, LeCouteur DG. Toxicity of Passifloraincarnata L. J ToxicolClinToxicol. 2000;38(1):63-6. 10. Therapeutic Research Faculty. Natural Medicines Comprehensive Database: Monograph – Passionflower. [cited 2013 Feb 10]. [approx 2p]. Available from: http://naturaldatabase.therapeuticresearch.com.ezproxy.ndnet.ca/nd/Sear… 11. Rey JM, Walter G, Soh N. Complementary and alternative medicine (CAM) treatments and pediatric psychopharmacology. J Am Acad Child Adolesc Psychiatry. 2008;47(4):364-8. 12. Wheatley D. Medicinal plants for insomnia: a review of their pharmacology, efficacy and tolerability. J Psychopharmacol. 2005;19(4):414-421.