Camphor in Ayurveda (Karpura): What the Texts Name and What Modern Sources Say

In Ayurveda, karpura is the Sanskrit name for camphor, listed in classical materia medica as a cooling, aromatic substance used externally and, in dose-limited preparations, internally. Modern summaries disagree on which plant the classical karpura came from, and Ayurveda's internal dosing is not a model for essential oil use.

Camphor Essential Oil

Our own Camphor Essential Oil, in sizes from 0.5 oz to bulk.

From $8.69

Shop Now →

Karpura is a name, not a single substance

The first thing to settle is what the word points to. A pharmacognosy listing from the SDACH Ayurvedic college quotes the opening verse of the Karpuradi Varga in the Bhavaprakasha Nighantu, "karpuraḥ śītalaḥ śveto ghanasāraḥ sugandhikaḥ", and gives Cinnamomum camphora (Lauraceae) as the plant. The same page then lists several "varieties": Bhimseni or Barās karpura, Japani karpura (the Cinnamomum camphora material), Patri karpura from Blumea balsamifera, and a synthetic variety called krtrima karpura. That is four different things sold under one Sanskrit word, one of them a daisy-family plant and one a laboratory product (SDACH Karpura monograph).

A Himalaya herbal monograph describes the older split differently. It says Sanskrit writers recognized two kinds, "pakva" from Cinnamomum camphora and "apakva" from Dryobalanops aromatica, and adds that apakva was used more in medicine (Himalaya Herbal Finder, camphor tree). The SDACH page does not use the pakva and apakva terms at all, and it assigns Bhimseni to a different label than the Himalaya page does. These two sources do not reconcile, and we are not going to pretend they do. A critical edition of the primary texts and the Ayurvedic Pharmacopoeia of India monograph are the places to settle it.

Why this matters for a buyer: the Borneo tree's "camphor" is, per the PROSEA plant handbook, crystallized oil that "consists almost entirely of borneol", which is not the same compound as the camphor in Cinnamomum camphora. PROSEA even advises avoiding trade names containing "camphor" for these woods because of confusion with true camphor wood (PROSEA, Dryobalanops). So when a text, a label or a seller says "Ayurvedic camphor", the first question is which plant and which compound. Our own position is simple: we sell Cinnamomum camphora oil, and we cannot tell you that it matches whatever a given classical verse meant. The wider trade story is in the history of camphor, and the Bornean source is picked up again in edible camphor versus regular camphor.

What classical-text summaries record

Ayurvedic materia medica describes a substance by its taste (rasa), qualities (guna), potency (virya), post-digestive effect (vipaka) and actions (karma). The SDACH listing gives the following for karpura. This is a description of how the tradition catalogs the material, reported as such, not a finding about what the substance does.

Ayurvedic attribute	As listed by SDACH
Rasa (taste)	Tikta (bitter), katu (pungent), madhura (sweet)
Guna (qualities)	Laghu (light), ruksa (dry)
Virya (potency)	Sita (cooling)
Vipaka	Katu
Karma (actions)	Kaphahara, pacana, hrdya, vrsya, caksusya, visaghna, madakari
Named formulations	Karpoorasav, Amritadhara, Karpurādi taila and others
Dose stated on the page	125 to 375 mg, in milk with sugar

The "cooling" label is the thing to notice. Ayurvedic potency is a classification, and the cooling in karpura's virya is not a temperature reading. Modern pharmacology has a separate and narrower finding: camphor produces a cool-feeling skin sensation, which is why the FDA's external analgesic monograph files it under counterirritants, specifically "irritants that produce cooling sensation" (FDA OTC monograph M017). The two vocabularies overlap in a word and not much else.

The same SDACH page also lists the traditional indications, from skin conditions and itching to cough and joint complaints, together with external uses in massage oils, eye preparations and pastes. We are not reproducing that list as a catalog of benefits. Reading the page, the most useful sentence for a Western reader is not an indication at all. It says a small quantity is preferable because a large quantity acts as a poison, and it lists abdominal pain, vomiting, giddiness, convulsions and death among the signs of excess (SDACH). The tradition itself is not casual about this material.

Traditional use versus modern evidence

A comparison the tradition-versus-science framing usually skips is which claims have any modern regulatory footing, and which are only traditional. The table keeps the categories apart. "Traditional only" means we found no modern source that tested the claim, not that it has been tested and failed.

Traditional entry	What modern sources say	Category
Applied in massage oils for joint complaints	FDA's OTC external analgesic monograph lists camphor exceeding 3% to 11% as a counterirritant ingredient in finished drug products	Regulatory fact about OTC drugs
Applied for itching	The same monograph lists camphor 0.1 to 3% among its analgesic, anesthetic and antipruritic active ingredients (alcohols and ketones group)	Regulatory fact about OTC drugs
Taken internally, 125 to 375 mg, as a tonic or for cough	An American Association of Poison Control Centers guideline sets a referral threshold above 30 mg/kg and reports convulsions can be the first sign of significant toxicity	Toxicology guidance, not an endorsement
Broad actions such as digestive, cardiac, mind-calming	A 2026 review of the Karpuradi Varga says "further research is required to validate traditional claims"	Traditional only
Laboratory activity such as antimicrobial or antioxidant	A 2022 review reports such activities for camphor in the laboratory; reviews of this kind summarize lab and animal work, not outcomes in people	Preclinical

The monograph rows describe the conditions under which camphor is permitted in over-the-counter drug products, which are a different class of product from an essential oil sold for aromatic and cosmetic use. Our oil is not an OTC drug, and nothing here says it is, or that it should be used the way those products are (FDA OTC monograph M017). The monograph's directions for these external analgesic ingredients also say children under 2 years of age should not use the products and should see a physician or doctor.

The 2026 Karpuradi Varga review and the 2022 Kafur review are both overviews, and both say what they are. The first covers an entire group of aromatic drugs, so its modern-science statements are group-level, not camphor-specific (Bansode and Ghotankar, 2026). The second describes Cinnamomum camphora as used "as an analgesic and antiseptic in Unani and other traditional systems" and lists laboratory activities (Usmani, Jahan and Sofiya, 2022). We cite them for what the traditions say, not as proof of any effect.

The 125 to 375 mg dose and the arithmetic you should do

This is the part of the Ayurvedic record we would rather explain than skip. The SDACH page states an internal dose of 125 to 375 mg. A reader could take that number as a safe adult figure. It should not be read that way, for three reasons grounded in the sources.

First, the poison-center guideline, which is the US standard for out-of-hospital management, sets a referral threshold of more than 30 mg/kg and notes that absorption is rapid, with symptoms commonly beginning within 5 to 15 minutes and convulsions often being the first sign of significant toxicity (Manoguerra et al., Clinical Toxicology 2006). Second, simple arithmetic shows how little room there is for a child: 30 mg/kg for a 10 kg child is 300 mg, which sits inside the same 125 to 375 mg range printed for adults. Third, a single listing page does not tell you what material the dose refers to, how it was prepared, or whether it is pakva, apakva or something else.

So our position is plain. We do not recommend swallowing camphor in any form, we do not sell our oil for that, and a classical dose range in a textbook does not change that. If anyone has swallowed camphor or a camphor product, call Poison Help at 1-800-222-1222 or 911 if there is a seizure or the person cannot be woken (Poison Help, National Capital Poison Center). The symptom picture is covered in camphor poisoning symptoms and what to do first.

US rules, imported products and Ayurvedic quality

Three regulatory facts frame any Ayurvedic camphor product bought in the United States.

Camphorated oil and the 11% ceiling. The same guideline records that the FDA ruled in 1983 that camphorated oil could no longer be sold over the counter, that OTC camphor-containing products cannot exceed 11% camphor, and that "imported, non-FDA approved, ethnic remedies sold in the US" can contain camphor above that limit (Manoguerra et al., 2006). The background is in FDA camphor rules explained.
Labels matter. The New York City health department says several camphor products sold in local stores are unsafe and illegal because they lack full labels, and that "stickers with pictures" are not proper labels (NYC Health, camphor).
Ayurvedic products carry their own contamination question. NCCIH states that some Ayurvedic preparations may contain lead, mercury or arsenic in toxic amounts, and that there is no significant regulation of Ayurvedic practice or education in the United States (NCCIH, Ayurvedic Medicine: In Depth). That concern is mostly about mineral and metal preparations, not camphor itself, but it is the reason an unlabeled imported product is a poor place to start.

Reading an "Ayurvedic camphor" product claim

If you are a craft buyer, a perfumer or a student comparing sources, a short checklist keeps the confusion out of your purchase.

Ask for the Latin name. "Karpura" does not tell you whether the material is Cinnamomum camphora, Dryobalanops, Blumea or synthetic.
Ask for the form. Crystals, blocks, a liquid fraction and an infused oil are different materials. Our product is an oil, the liquid fraction described on Inside the Still, not the crystalline camphor used in temple burning (see why camphor is burned in puja and aarti).
Ask for a lot document. A certificate that ties to the lot in your hand beats a traditional name. Ours posts a COA with physical constants; it does not carry a chromatogram, and the safrole result follows the lot on request.
Treat dose ranges as history. A figure from a college web page or a text is a record of tradition, not label guidance.

For readers who want camphor oil for aromatic or craft work, the plain description is on the shop page: one oil, bottled undiluted in amber glass, in sizes from 0.5 oz to 400 lb. It is sold as an aromatic and cosmetic material, not as a drug, and not in the Ayurvedic sense of karpura.

How this relates to other traditions

The Ayurvedic record sits next to the Chinese one, where camphor is zhang nao, covered in camphor in traditional Chinese medicine, and next to ritual use, summarized in camphor in ritual and tradition. Each tradition handles a slightly different material under a similar name, which is the same lesson again. For the plant itself and the product basics, start at what camphor essential oil is.

Frequently asked questions

Is Ayurvedic karpura the same as camphor essential oil?

Not necessarily. Karpura names a class of materials, including Cinnamomum camphora crystals, Borneo borneol-rich camphor and other substances, per the SDACH and PROSEA sources above. Camphor essential oil is a liquid fraction of C. camphora distillate. The names overlap, the materials do not.

Does Ayurveda recommend swallowing camphor?

Classical summaries list internal preparations with small stated doses and also warn that a large quantity acts as a poison. We do not recommend swallowing camphor, and US poison-center guidance treats ingestion above 30 mg/kg as a reason for emergency referral. Anyone considering an Ayurvedic preparation should speak with a physician and a qualified practitioner.

Should I tell my doctor about Ayurvedic products?

Yes. NCCIH advises telling all your health care providers about complementary approaches you use, and to check first if you are pregnant or nursing, or have a health condition.

Why do the Ayurvedic sources disagree about which tree karpura comes from?

Because the Sanskrit word was applied to more than one material. The Himalaya monograph assigns pakva to Cinnamomum camphora and apakva to Dryobalanops aromatica, while the SDACH listing uses different labels. The primary texts and the Ayurvedic Pharmacopoeia of India are the way to resolve it.

Is camphor in Ayurveda safe for children?

The sources we cite give no pediatric endorsement. NYC Health calls camphor products especially dangerous to young children, and the FDA monograph directions for external analgesic ingredients say children under 2 should not use them and should consult a doctor. Ask a pediatrician.

What we could not verify

We did not review the Bhavaprakasha Nighantu or the Ayurvedic Pharmacopoeia monograph directly. Everything classical above comes from two college and herbal-monograph web pages and two journal reviews. That is enough to describe what the tradition records, and not enough to settle which plant a given verse meant.