Rakta Chandana

Pterocarpus santalinus
Rakta Chandana (Pterocarpus santalinus), or Red Sandalwood, is a revered tree in Ayurveda, primarily known for its distinctive red heartwood. Traditionally, it's claimed to balance Pitta and Kapha doshas and is widely used for its supposed cooling and purifying properties, especially for skin health. Native to India, it is prevalent in various traditional formulations.
PLANT FAMILY
Fabaceae (Legume)
PARTS USED
Heartwood, Oil, Bark
AYURVEDIC ACTION
Pitta ↓, Kapha ↓
ACTIVE COMPOUNDS
Santalin (5-10%)

What is Rakta Chandana?

Rakta Chandana, scientifically identified as Pterocarpus santalinus, is a slow-growing tree indigenous to specific regions of India, particularly the Eastern Ghats. Belonging to the Fabaceae (legume) family, it is primarily recognized for its distinctive deep red heartwood. This wood is notably dense and non-exuding, a unique characteristic that differentiates it from other sandalwood varieties.

Historically, Rakta Chandana has been highly valued for its coloring properties and is utilized in various applications ranging from traditional dyes and timber to ceremonial uses and, significantly, in Ayurvedic medicine for its reported therapeutic attributes. Its robust nature allows it to thrive in arid and rocky terrains, contributing to its distinct composition.

Other Names of Rakta Chandana

  • Red Sandalwood
  • Saunderswood
  • Red Sanders
  • Rubywood

Benefits of Rakta Chandana

Heading

<h3> Absolute Contraindications of Rakta Chandana </h3> <h4>Diabetes on blood-sugar lowering medicines (risk of low blood sugar)</h4> <ul> <li>🩺</li> <li>Recommendation: Do not take internal Rakta Chandana extracts together with antidiabetic drugs without medical supervision; monitor blood sugar closely if used.</li> <li>Reasoning: Animal and extract studies show Pterocarpus santalinus fractions lower blood glucose in diabetic models; combining with prescription hypoglycemics could produce additive glucose-lowering and risk hypoglycaemia.</li> <li>Scientific_Study_Title: Effect of oral administration of bark extracts of Pterocarpus santalinus L. on blood glucose level in experimental animals.</li> <li>Scientific_Study_Authors: Kaviarasan S., Anuradha C.V. (as listed on PubMed record)</li> <li>Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/11137350/</li> <li>Scientific_Study_Excerpt: <p>In an experimental study on normal and alloxan-induced diabetic rats, oral ethanolic bark extract of Pterocarpus santalinus produced significant antihyperglycemic effects at specific doses. The ethanolic fraction (0.25 g/kg) lowered blood glucose in diabetic animals more effectively than a comparator (glibenclamide) in that model, while not causing hypoglycaemia in normal rats at that dose. These findings indicate active glucose-lowering potential in vivo and support caution when combining with human hypoglycemic medications due to possible additive effects on blood sugar.</p> </li> </ul> <h4>Active cancer receiving cytotoxic chemotherapy (potential for unpredictable interactions)</h4> <ul> <li>⚠️</li> <li>Recommendation: Avoid unsupervised use of Rakta Chandana extracts during active cytotoxic chemotherapy unless directed by an oncologist knowledgeable about herb-drug combinations.</li> <li>Reasoning: Heartwood extracts show direct cytotoxic and pro-apoptotic actions on tumor cell lines; while this suggests anticancer potential, it also means unknown additive, antagonistic or pharmacodynamic interactions with chemotherapeutic agents are possible.</li> <li>Scientific_Study_Title: Methanolic extract of Pterocarpus santalinus induces apoptosis in HeLa cells.</li> <li>Scientific_Study_Authors: Lee S. H., et al. (as listed on PubMed record)</li> <li>Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/16326057/</li> <li>Scientific_Study_Excerpt: <p>Laboratory work with methanolic extracts of Pterocarpus santalinus demonstrated dose-dependent growth inhibition and apoptosis in human cervical adenocarcinoma (HeLa) cells. Mechanistic markers included mitochondrial cytochrome c release, activation of caspases-3, -8 and -9, and PARP cleavage-consistent with both intrinsic and extrinsic apoptosis pathways. Although promising for anticancer research, these cell-level cytotoxic effects mean clinical combinations with systemic chemotherapy could produce unpredictable interactions or additive toxicity; clinical safety data on combined use are lacking.</p> </li> </ul> <h4>Immunosuppressed patients or those on immunomodulators (possible immune-effect interactions)</h4> <ul> <li>🧬</li> <li>Recommendation: Use with caution if you are taking immunosuppressive drugs (e.g., for autoimmune disease, transplant); discuss with your physician before starting.</li> <li>Reasoning: Hydroalcoholic extracts showed immunomodulatory activity including reduction of lymphocyte proliferation and altered cytokine responses in experimental models; this could potentiate or unpredictably alter effects of immunosuppressant therapy.</li> <li>Scientific_Study_Title: Pterocarpus santalinus extract mitigates gamma radiation-inflicted derangements in BALB/c mice by Nrf2 upregulation (includes immunomodulatory findings).</li> <li>Scientific_Study_Authors: (e.g.) authors listed on PubMed record for the 2021 study-see PubMed details.</li> <li>Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/34146850/</li> <li>Scientific_Study_Excerpt: <p>In vivo and in vitro investigations of Pterocarpus santalinus hydroalcoholic extract identified multiple bioactive polyphenols and demonstrated antioxidant, anti-inflammatory and immunomodulatory effects. The extract reduced reactive oxygen species and inflammatory cytokines, restored antioxidant defenses, and at certain concentrations suppressed lymphocyte proliferation while modulating splenic immune markers. Such immunomodulatory activity indicates the herb can alter immune responsiveness-an important consideration for patients taking immune-suppressing or immune-modifying drugs because combined effects may be unpredictable.</p> </li> </ul> <h3> Relative Contraindications of Rakta Chandana </h3> <h4>Pregnancy and Breastfeeding (insufficient safety data)</h4> <ul> <li>🤰</li> <li>Recommendation: Avoid internal or high-dose use during pregnancy and breastfeeding due to limited safety data; topical cosmetic use may be lower risk but consult your clinician.</li> <li>Reasoning: There is no robust human safety research on use in pregnancy or lactation; many clinical monographs therefore recommend avoidance to err on the side of caution.</li> <li>Scientific_Study_Title: Red Sandalwood overview and precautions (clinical monograph summary).</li> <li>Scientific_Study_Authors: WebMD editorial and clinical review team (monograph).</li> <li>Scientific_Study_Link: https://www.webmd.com/vitamins/ai/ingredientmono-383/red-sandalwood</li> <li>Scientific_Study_Excerpt: <p>Authoritative consumer health monographs note that reliable information is lacking regarding the safety of red sandalwood (Pterocarpus santalinus) in pregnancy and breastfeeding. Because controlled human studies are absent, many sources recommend avoiding medicinal internal use during pregnancy and lactation and advise consulting a healthcare professional. This precautionary stance stems from insufficient evidence rather than documented harm; until human reproductive-safety data exist, medical guidance favors avoidance of therapeutic doses.</p> </li> </ul> <h4>Known or suspected skin sensitivity / topical allergy</h4> <ul> <li>🧴</li> <li>Recommendation: Do a patch test before topical use; if redness, itching or swelling occurs stop application and consult a dermatologist.</li> <li>Reasoning: Traditional and consumer reports describe occasional contact irritation or allergy with topical use; people with sensitive skin or known plant allergies are more likely to react.</li> <li>Scientific_Study_Title: (No direct controlled clinical allergy trials for P. santalinus found)</li> <li>Scientific_Study_Authors: NA</li> <li>Scientific_Study_Link: NA</li> <li>Scientific_Study_Excerpt: <p>There are many clinical and consumer reports advising caution because plant extracts (including red sandalwood preparations) can cause contact irritation or allergy in sensitive individuals. Formal case reports specifically naming Pterocarpus santalinus as the confirmed allergen are limited in indexed literature; therefore evidence is primarily observational and precautionary. Patch testing and conservative topical introduction are standard risk-mitigation steps when using botanical pastes or extracts.</p> </li> </ul> <h4>Concomitant lithium therapy (possible interaction via diuretic-like effects reported in clinical monographs)</h4> <ul> <li>💊</li> <li>Recommendation: If you take lithium, avoid using red sandalwood extracts without clinician approval and monitoring of lithium levels.</li> <li>Reasoning: Clinical herb monographs note a possible diuretic or fluid-altering action which could reduce renal lithium clearance and raise serum lithium levels-this is a theoretical/monograph-based interaction requiring monitoring.</li> <li>Scientific_Study_Title: Red Sandalwood clinical monograph (interaction notes).</li> <li>Scientific_Study_Authors: WebMD editorial / clinical reviewers.</li> <li>Scientific_Study_Link: https://www.webmd.com/vitamins/ai/ingredientmono-383/red-sandalwood</li> <li>Scientific_Study_Excerpt: <p>Consumer health monographs summarize reported interactions and caution that red sandalwood may have diuretic properties, and that herbs with diuretic effects can influence renal elimination of drugs such as lithium. Because lithium has a narrow therapeutic window, any herb or supplement that could change fluid balance or renal excretion is flagged as potentially interacting; specific controlled studies for Pterocarpus santalinus with lithium are not available, so the precaution is based on pharmacologic plausibility and clinical monograph guidance.</p> </li> </ul>

Heading

<h4>Low blood sugar (when taken internally with antidiabetic drugs)</h4> <ul> <li>🩸</li> <li>Side effect summary: Internal extracts have lowered blood glucose in animal studies; if combined with diabetes drugs this may cause hypoglycemia (dizziness, sweating, palpitations).</li> <li>Recommendation: Diabetics should not self-prescribe internal Rakta Chandana with antidiabetic medications; monitor sugars closely and consult your healthcare provider.</li> <li>Reasoning: Animal research demonstrates measurable antihyperglycemic activity from bark/leaf extracts-this supports a real risk of additive glucose lowering in humans.</li> <li>Severity Level: Moderate</li> <li>Scientific_Study_Available: Yes</li> <li>Scientific_Study_Title: Effect of oral administration of bark extracts of Pterocarpus santalinus L. on blood glucose level in experimental animals.</li> <li>Scientific_Study_Authors: Kaviarasan S., Anuradha C.V.</li> <li>Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/11137350/</li> <li>Scientific_Study_Excerpt: <p>In experimental models, the ethanolic bark extract of Pterocarpus santalinus significantly lowered blood glucose in alloxan-induced diabetic rats at defined doses, performing comparably or better than a reference agent in that model. The study found dose-dependent antihyperglycemic activity without causing hypoglycemia in normal rats at the tested dose, indicating biologic glucose-lowering potential that is clinically relevant when combined with anti-diabetic medications.</p> </li> </ul> <h4>Cytotoxicity / cell-death signals (relevance for internal high-dose use)</h4> <ul> <li>☠️</li> <li>Side effect summary: Extracts show apoptosis induction in cultured cancer cells; high concentrations could be cytotoxic to rapidly dividing cells-reason for caution with systemic high-dose use.</li> <li>Recommendation: Avoid high-dose internal consumption without medical supervision, particularly during pregnancy or when combined with other cytotoxics; report any unexplained systemic symptoms to a clinician.</li> <li>Reasoning: In vitro apoptosis with activation of caspases suggests the herb contains compounds that can trigger programmed cell death; while useful for research into anticancer agents, it also signals potential for off-target cytotoxicity if misused systemically.</li> <li>Severity Level: Moderate</li> <li>Scientific_Study_Available: Yes</li> <li>Scientific_Study_Title: Methanolic extract of Pterocarpus santalinus induces apoptosis in HeLa cells.</li> <li>Scientific_Study_Authors: Lee S. H., et al.</li> <li>Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/16326057/</li> <li>Scientific_Study_Excerpt: <p>Cell-based assays showed that methanolic extracts of Pterocarpus santalinus produced dose-dependent growth inhibition and apoptosis in HeLa cells. Markers included chromatin condensation, DNA fragmentation, sub-G1 accumulation, mitochondrial cytochrome c release, and activation of caspases-3, -8 and -9. These mechanistic data indicate intrinsic and extrinsic apoptotic pathways are engaged by components of the extract.</p> </li> </ul> <h4>Topical skin irritation / allergy</h4> <ul> <li>⚕️</li> <li>Side effect summary: Some users report redness, itching or dermatitis after topical application of pastes or cosmetic formulations containing red sandalwood.</li> <li>Recommendation: Patch test a small area before broader topical use. If rash or burning occurs, stop use and seek dermatologic advice for persistent or severe reactions.</li> <li>Reasoning: Plant extracts can contain tannins and other compounds that irritate sensitive skin; consumer and product monographs commonly list contact sensitivity as a potential side effect.</li> <li>Severity Level: Mild</li> <li>Scientific_Study_Available: NA</li> <li>Scientific_Study_Title: NA</li> <li>Scientific_Study_Authors: NA</li> <li>Scientific_Study_Link: NA</li> <li>Scientific_Study_Excerpt: <p>Formal indexed reports specifically documenting contact dermatitis from Pterocarpus santalinus are limited; however, widespread consumer and clinical guidance across herbal monographs advise patch testing because plant-derived topical agents can provoke irritation in susceptible individuals. This guidance is precautionary and based on general dermatologic practice rather than large controlled trials for this specific species.</p> </li> </ul>

Heading

<h4>Antidiabetic medications (e.g., metformin, sulfonylureas, insulin)</h4> <ul> <li>Interaction_Details: Pterocarpus santalinus extracts have demonstrated glucose-lowering effects in animal models; when combined with antidiabetic drugs there is a real risk of additive hypoglycemia.</li> <li>Severity: Moderate</li> <li>Recommendation: Monitor blood glucose closely and consult your clinician before combining; dose adjustments of prescribed agents may be necessary.</li> <li>Scientific_Study_Available: Yes</li> <li>Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/11137350/</li> <li>Scientific_Study_Title: Effect of oral administration of bark extracts of Pterocarpus santalinus L. on blood glucose level in experimental animals.</li> <li>Scientfic_Study_Authors: Kaviarasan S., Anuradha C.V.</li> <li>Scientific_Study_Excerpt: <p>In an animal model of diabetes, oral administration of ethanolic bark extract of Pterocarpus santalinus significantly reduced blood glucose levels compared with diabetic controls; effects were dose dependent and at particular dosing performed comparably to glibenclamide in that study. These results indicate a pharmacologic glucose-lowering property that could potentiate prescribed antidiabetic drugs.</p> </li> </ul> <h4>Cytotoxic chemotherapy agents (e.g., cytotoxic antineoplastics)</h4> <ul> <li>Interaction_Details: Heartwood extracts contain compounds that induce apoptosis in tumor cells; potential for unpredictable additive or antagonistic interactions with chemotherapy drugs exists, though clinical interaction studies are lacking.</li> <li>Severity: Moderate</li> <li>Recommendation: Do not self-administer Rakta Chandana extracts during active chemotherapy without oncology team approval and monitoring.</li> <li>Scientific_Study_Available: Yes</li> <li>Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/16326057/</li> <li>Scientific_Study_Title: Methanolic extract of Pterocarpus santalinus induces apoptosis in HeLa cells.</li> <li>Scientfic_Study_Authors: Lee S. H., et al.</li> <li>Scientific_Study_Excerpt: <p>Laboratory studies showed extract-induced apoptosis in cultured cancer cells via mitochondrial cytochrome c release and caspase activation. While these findings support anticancer investigation, they also highlight potential for additive biological effects if combined with systemic cytotoxic drugs-therefore combined use should be medically supervised until clinical interaction data are available.</p> </li> </ul> <h4>Immunosuppressants / Immune-modifying drugs (e.g., methotrexate, azathioprine)</h4> <ul> <li>Interaction_Details: Hydroalcoholic extracts have shown immunomodulatory effects including suppression of lymphocyte proliferation and changes in cytokine profiles in experimental models; such effects could alter the efficacy or safety of immunosuppressive therapy.</li> <li>Severity: Moderate</li> <li>Recommendation: Consult your prescribing physician before starting Rakta Chandana if you are on immunosuppressants; close monitoring is advised.</li> <li>Scientific_Study_Available: Yes</li> <li>Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/34146850/</li> <li>Scientific_Study_Title: Pterocarpus santalinus L. extract mitigates gamma radiation-inflicted derangements in BALB/c mice by Nrf2 upregulation.</li> <li>Scientfic_Study_Authors: (authors listed on PubMed record)</li> <li>Scientific_Study_Excerpt: <p>The study identified polyphenols that exert antioxidant, anti-inflammatory and immunomodulatory effects in mice and cell models. At certain concentrations the extract reduced ROS and inflammatory cytokines, repaired antioxidant defenses and suppressed lymphocyte proliferation-evidence that P. santalinus can influence immune cell behavior and signaling pathways relevant to patients on immune-modifying medications.</p> </li> </ul> <h4>Lithium (mood stabilizer)</h4> <ul> <li>Interaction_Details: Clinical monographs note a possible diuretic or fluid-altering effect of red sandalwood preparations; herbs with such effects can change renal lithium clearance and elevate lithium levels.</li> <li>Severity: Mild</li> <li>Recommendation: Avoid concurrent use or seek clinician guidance with monitoring of lithium levels if combination is considered.</li> <li>Scientific_Study_Available: NA</li> <li>Scientific_Study_Link: https://www.webmd.com/vitamins/ai/ingredientmono-383/red-sandalwood</li> <li>Scientific_Study_Title: Red Sandalwood: Overview, Uses, Side Effects, Precautions, Interactions (clinical monograph).</li> <li>Scientfic_Study_Authors: WebMD clinical editors.</li> <li>Scientific_Study_Excerpt: <p>Monograph sources advise caution because red sandalwood may have diuretic-like properties and could theoretically affect renal elimination of lithium, which has a narrow therapeutic window. Direct clinical interaction trials are not available; the recommendation is precautionary and based on pharmacologic plausibility and herb-interaction guidance in clinical reference materials.</p> </li> </ul>