Herbal medicine

Definition

Herbal medicine — also called herbalism, phytotherapy, or phytomedicine — is the study of the medicinal properties of plants (pharmacognosy) and their use as medicines, whether as crude plant parts, juices, gums, fatty oils, essential oils, or finished preparations. It is the foundation of traditional medicine systems worldwide and remains a major part of health care across the globe: the World Health Organization (WHO) estimates that 80 percent of the population of some Asian and African countries uses herbal medicine for some aspect of primary health care. (Wikipedia — Herbal medicine)

In the Philippines, herbal medicine carries a statutory definition: Republic Act No. 8423, the Traditional and Alternative Medicine Act (TAMA) of 1997, defines herbal medicines as finished, labelled medicinal products containing active ingredients from aerial or underground plant parts or other plant materials, whether crude or as plant preparations — with excipients allowed, but products combining plant materials with chemically defined active substances excluded. The law created the Philippine Institute of Traditional and Alternative Health Care (PITAHC), attached to the Department of Health (DOH), which advocates the use of the ten medicinal plants identified by the DOH through scientific research and validation: lagundi, sambong, ampalaya, akapulko, bawang, bayabas, yerba buena, ulasimang bato, tsaang gubat, and niyog-niyogan. (LawPhil — RA 8423, PITAHC — official site, PITAHC — Directory of Herbs)

Identities

Source	Identifier	URL
Wikipedia	Herbal medicine	https://en.wikipedia.org/wiki/Herbal_medicine
Wikidata	herbalism (Q861699)	https://www.wikidata.org/wiki/Q861699
DBpedia	Herbal_medicine	http://dbpedia.org/resource/Herbal_medicine
ProductOntology	N/A	N/A
Wiktionary	herbal medicine (noun)	https://en.wiktionary.org/wiki/herbal_medicine
Library of Congress Subject Headings (LCSH)	N/A	N/A
MeSH	Herbal Medicine (D029001)	https://id.nlm.nih.gov/mesh/D029001
NCBI Taxonomy	N/A	N/A
AGROVOC	medicinal plants (c_2393)	http://aims.fao.org/aos/agrovoc/c_2393
Google Scholar	herbal medicine Philippines PITAHC RA 8423 ten medicinal plants lagundi sambong ampalaya DOH validation traditional medicine	N/A
ConceptNet	herbal medicine (IsA alternative medicine, medicine)	http://conceptnet.io/c/en/herbal_medicine
OpenCyc	N/A	N/A

Also Known As

Examples and Analogies

The pharmacy in the yard: the DOH-validated ten function as a home formulary — lagundi (Vitex negundo) for cough, sambong (Blumea balsamifera) as a diuretic against kidney stones, ampalaya (Momordica charantia) for blood sugar, akapulko (Senna alata) for ringworm, yerba buena (Mentha cordifolia) for toothache and headache — each a cultivated plant with an approved indication, like over-the-counter shelves growing in a garden. (PITAHC — Directory of Herbs)
The validation ladder: Philippine policy treats a herb the way a regulator treats a drug candidate — from community use, through DOH scientific research and validation, to PITAHC advocacy of the plant and registration of finished products; the qualifier “scientifically validated” is the rung that separates the endorsed ten from the thousands of folk remedies outside the list. (LawPhil — RA 8423, PITAHC — official site)
The interaction warning: herbal does not mean inert — plant constituents can compound blood-pressure lowering, amplify anticoagulants, or interfere with cytochrome P450 drug metabolism, so an herbal tea is pharmacologically closer to a low-dose medicine than to a beverage. (Wikipedia — Herbal medicine)

Usage Scenarios

1. Household and Community Care

Filipino households use the validated plants for minor complaints in the traditional manner — lagundi leaves for cough and asthma, sambong for urinary complaints, bayabas (guava) leaf washes for wounds and swollen gums, yerba buena applied for headache — the community-based practice that made herbal medicine part of the primary-health-care landscape. (PITAHC — Directory of Herbs)

2. DOH and PITAHC Programs

PITAHC, created by RA 8423 and attached to the DOH, runs the national program: advocacy of the ten validated plants, production of its own herbal medicines and herbacare+ herbal soaps, research and development, and the training and certification of traditional-health practitioners — the institutional channel through which herbal medicine reaches the public system. (LawPhil — RA 8423, PITAHC — official site)

3. Regulation and Product Registration

Herbal products in the Philippines sit inside the TAMA framework, with standards of manufacture, marketing, and quality control; the same statute that defines herbal medicines empowers PITAHC to set standards with the food-and-drug regulator — the arrangement under which finished herbal products are labelled, registered, and policed, and which parallels international regimes such as the United States dietary-supplement regime under DSHEA and the European Medicines Agency’s herbal-monograph system. (LawPhil — RA 8423, Wikipedia — Herbal medicine)

4. Research and Evidence Appraisal

Researchers appraise herbal medicine through pharmacognosy and clinical study — the same ladder the DOH used to validate the ten — while the WHO’s Global Traditional Medicine Centre, established in 2022 in Jamnagar, India, now works to build the global evidence base, noting that about 90 percent of WHO Member States report using traditional medicine. (PITAHC — Directory of Herbs, WHO — Global Traditional Medicine Centre)

Strategies

Validate before integrating: RA 8423’s repeated qualifiers — “proven” modalities, plants validated through “scientific research” — make evidence the condition of official endorsement, protecting the national program from wholesale adoption of untested practice. (LawPhil — RA 8423)
A defined, teachable list: concentrating advocacy on ten validated plants gives health workers and households a bounded formulary — deep evidence for a few species rather than thin claims about thousands. (PITAHC — official site, PITAHC — Directory of Herbs)
Complement, do not replace: PITAHC’s own advisory — “always consult a health professional for proper diagnosis and advice” — frames herbal use as an adjunct to, not a substitute for, medical care. (PITAHC — Directory of Herbs)
Protect the knowledge source: Section 2 of RA 8423 lets indigenous cultural communities own their traditional knowledge, require acknowledgment of its source, and demand a share of returns from commercial exploitation — a benefit-sharing strategy against uncompensated extraction. (LawPhil — RA 8423)
Regulate by product, not by practice alone: by defining the herbal medicine as a finished, labelled product, Philippine law attaches its controls to the article of commerce, aligning enforcement with the food-and-drug regulator’s existing machinery. (LawPhil — RA 8423)

Security and Safety Measures

Adulteration control: the documented hazard of the global market — a 2018 U.S. FDA study finding undisclosed pharmaceutical additives such as sildenafil and sibutramine in over 700 “natural” supplements, and a 2014 Australian survey finding roughly 60 percent of products with ingredients not matching their labels — is the core rationale for registration, labelling, and quality-control standards. (Wikipedia — Herbal medicine)
Interaction screening: because herb-drug interactions can compound blood-pressure lowering, amplify anticoagulants, or alter cytochrome P450 metabolism, patients on medication are advised to disclose herbal use to prescribers — the clinical safeguard against duplicating or defeating pharmaceutical treatment. (Wikipedia — Herbal medicine)
Toxic-herb vigilance: regulators have banned or restricted herbs with established harm — ephedra banned as a U.S. dietary supplement since 2004, kava banned in parts of the European Union — the precedent for removing botanicals that fail safety review. (Wikipedia — Herbal medicine)
Validation as the gate: the Philippine program’s safety instrument is scientific validation itself — only plants with documented pre-clinical and clinical evidence make the DOH-PITAHC list, and the directory pairs each indication with its evidence. (PITAHC — Directory of Herbs)
Professional consultation: PITAHC’s standing advice to consult a health professional for proper diagnosis before self-treating is the first-line safety measure for all herbal use. (PITAHC — Directory of Herbs)

Historical Context

Plant medicine is among the oldest of human technologies — archaeological evidence places plant use in the Paleolithic, Sumerian clay tablets list medicinal plants from more than 5,000 years ago, the Egyptian Ebers papyrus (c. 1550 BCE) records over 700 mostly plant-based compounds, and Dioscorides’ De Materia Medica (1st century CE) remained a standard into the 1600s; Chinese and Ayurvedic systems developed their own vast herbal pharmacopoeias. Modern evidence-based medicine eventually displaced herbalism from the pharmacopoeia’s center, but not from practice: the WHO’s estimate that 80 percent of some Asian and African populations use herbal medicine for aspects of primary care keeps it on the global health agenda. (Wikipedia — Herbal medicine)

The Philippine chapter of that history was written into law on December 9, 1997, when Republic Act No. 8423 created PITAHC and committed the state to developing and integrating traditional and alternative health care — including the herbal medicines the statute defines — into the national system, with an indigenous-knowledge ownership clause ahead of its time. The DOH’s program of scientific validation fixed the ten plants PITAHC still champions, and this wiki carries the individual entries: lagundi, sambong, ampalaya, akapulko, bawang, tsaang gubat, ulasimang bato, yerba buena, and niyog-niyogan, alongside the wider corpus on centella asiatica and the Act itself. (LawPhil — RA 8423, PITAHC — official site, PITAHC — Directory of Herbs)

Globally, the institutional arc bends toward evidence: the WHO established its Global Traditional Medicine Centre in Jamnagar, Gujarat, India in 2022 as a knowledge hub combining “ancient wisdom and modern science,” reports that roughly 90 percent of Member States use traditional medicine, and has framed a Global Traditional Medicine Strategy for 2025–2034 — a recognition that billions of users, and less than one percent of global health research investment, define the field’s central gap. (WHO — Global Traditional Medicine Centre)

Challenges and Controversies

Evidence and Efficacy Debates

The standing scientific critique of herbal medicine is the weakness of its evidence base: many traditions rest on historical use rather than controlled trials, a 2015 Australian government review found no clear evidence of effectiveness justifying insurance coverage of herbalism, and critics distinguish herbal medicine proper from “paraherbalism” — the pseudoscientific marketing of unproven plant extracts. The Philippine answer is the validation ladder: only the scientifically tested ten carry the DOH-PITAHC endorsement. (Wikipedia — Herbal medicine, PITAHC — official site)

Safety, Interactions, and Adulteration

Herbal medicine’s safety record is genuinely mixed: adverse reactions from “adulteration, inappropriate formulation, or lack of understanding of plant and drug interactions” can be life-threatening; documented cases include liver failure linked to black cohosh and potassium depletion from chronic licorice, while the supplement market’s adulteration record — pharmaceuticals hidden in “natural” capsules — has drawn hundreds of regulatory warning letters, including for fraudulent COVID-19 claims. These are the documented grounds for the registration and labelling regimes that govern herbal products. (Wikipedia — Herbal medicine)

Ownership of Indigenous Knowledge

RA 8423’s declaration that indigenous cultural societies and communities may own their traditional medicinal knowledge — requiring acknowledgment of source and a share of financial returns from commercial use — addresses a contested global question: who profits when community plant knowledge becomes a registered product. The Philippine statute stands with benefit-sharing, though enforcement of such provisions remains an active policy problem. (LawPhil — RA 8423)