Laung (Clove)

<h3> Absolute Contraindications of Laung (Clove) </h3> <h4>Infants and young children - Do not give clove oil or concentrated clove to young children</h4> <ul> <li>👶</li> <li>Recommendation: Never give clove oil or concentrated clove extracts by mouth to infants or toddlers; keep bottles locked away. If accidental ingestion occurs, seek emergency care immediately.</li> <li>Reasoning: Case reports and poison-centre analyses show even small volumes (e.g., ~5-10 mL of clove oil) in young children can cause seizures, coma, breathing problems and severe liver injury.</li> <li>Scientific_Study_Title: Essential oil poisoning: N-acetylcysteine for eugenol-induced hepatic failure and analysis of a national database.</li> <li>Scientific_Study_Authors: Davies, W., et al.</li> <li>Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/15895251/</li> <li>Scientific_Study_Excerpt: <p>The authors describe a serious pediatric poisoning after ingestion of clove oil resulting in fulminant hepatic failure, seizures and metabolic derangement. The case required intensive supportive care and administration of N-acetylcysteine with clinical improvement. The paper also analyses national data showing increased aromatherapy-related home accidents and highlights clove oil’s potential for severe systemic toxicity in small children after relatively small ingestions. The message is clear: concentrated clove oil is hazardous to infants and toddlers and must be avoided and stored safely.</p> </li> </ul> <h4>Known allergy or prior severe reaction to clove/eugenol [Skin or mouth reactions]</h4> <ul> <li>🚫</li> <li>Recommendation: If you have had rash, swelling, mouth sores or dermatitis after using clove, avoid using it again and consult an allergist or dermatologist before any future use.</li> <li>Reasoning: Patch-test surveys and clinical reports show that eugenol/clove oil can sensitize skin and cause allergic contact dermatitis or stomatitis in susceptible people.</li> <li>Scientific_Study_Title: Eugenol and clove leaf oil: a survey of consumer patch-test sensitization.</li> <li>Scientific_Study_Authors: Gibbs, S., et al.</li> <li>Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/6686576/</li> <li>Scientific_Study_Excerpt: <p>Large patch-test data collected across thousands of tests indicate that eugenol and clove leaf oil can elicit both induced and pre-existing sensitization reactions in a small number of consumers at concentrations used for testing. While most commercial concentrations are low and reactions are uncommon, the study underlines that eugenol is a recognized contact allergen: those with prior reactions can expect recurrent dermatitis or oral mucosal reactions on re-exposure and should avoid further use.</p> </li> </ul> <h4>Undiluted topical application to mucous membranes (e.g., direct pure clove oil on gums/oral wounds)</h4> <ul> <li>🔥</li> <li>Recommendation: Do not apply neat (undiluted) clove oil to gums, open sores or oral mucosa. For dental discomfort use professionally formulated products or dilute under guidance; if severe burning or ulceration occurs, stop and seek dental/medical care.</li> <li>Reasoning: Animal and clinical data show concentrated eugenol causes protein denaturation, cell necrosis and mucosal damage after direct contact; this explains reports of burns, ulceration and tissue injury when undiluted oil is used in the mouth.</li> <li>Scientific_Study_Title: The effect of eugenol on oral mucous membranes.</li> <li>Scientific_Study_Authors: Unwin, M., et al.</li> <li>Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/281340/</li> <li>Scientific_Study_Excerpt: <p>In controlled animal experiments, 100% eugenol applied briefly to labial mucosa produced rapid epithelial protein denaturation, loss of cell structure and necrosis, with vesicle formation and edema. Histology showed clear tissue destruction within hours. These findings mechanistically support clinical reports where pure clove oil causes oral burns, sloughing and prolonged mucosal pain when applied undiluted to human oral tissues.</p> </li> </ul> <h3> Relative Contraindications of Laung (Clove) </h3> <h4>On anticoagulant or antiplatelet medications (e.g., warfarin, aspirin, clopidogrel)</h4> <ul> <li>🩸</li> <li>Recommendation: Use caution - avoid concentrated clove supplements or oils while taking blood thinners unless supervised by your clinician; pre- and post-use INR/PT monitoring may be advised for warfarin patients.</li> <li>Reasoning: Clove/eugenol inhibits platelet aggregation and thromboxane pathways in lab and animal studies; this could add to anticoagulant effect and raise bleeding risk when combined with prescription blood thinners.</li> <li>Scientific_Study_Title: Antithrombotic activity of clove oil.</li> <li>Scientific_Study_Authors: Ghelardini, C., et al.</li> <li>Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/8078176/</li> <li>Scientific_Study_Excerpt: <p>Laboratory work and in vivo models demonstrated that clove oil inhibits human platelet aggregation induced by arachidonic acid, platelet-activating factor and collagen, and reduced thromboxane production. In rabbits, pre-treatment with clove oil protected against experimentally induced pulmonary platelet thrombosis. These data indicate clove oil has pharmacologic antiplatelet/antithrombotic activity that can be additive with anticoagulant drugs and increase bleeding risk in clinical settings.</p> </li> </ul> <h4>Taking multiple medicines metabolized by liver CYP enzymes</h4> <ul> <li>⚖️</li> <li>Recommendation: If you take medications cleared by CYP1A2, CYP2C9, CYP2D6 or CYP3A4 (many common drugs), check with your pharmacist or doctor before using concentrated clove extracts or eugenol supplements.</li> <li>Reasoning: In human liver microsome studies, eugenol inhibited key CYP enzymes in a concentration-dependent manner, potentially altering blood levels of many drugs.</li> <li>Scientific_Study_Title: Effect of eugenol on cytochrome P450 1A2, 2C9, 2D6, and 3A4 activity in human liver microsomes.</li> <li>Scientific_Study_Authors: Alharbi N.F.M., Ahad A., Bin Jardan Y.A., Al-Jenoobi F.I.</li> <li>Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/38841106/</li> <li>Scientific_Study_Excerpt: <p>Using human liver microsomes, researchers showed that eugenol reduced activity of CYP1A2, CYP2C9, CYP2D6 and CYP3A4 in a dose-dependent fashion with measurable IC50 values, indicating that simultaneous use of eugenol-containing products could alter the metabolism and plasma concentrations of drugs handled by these enzymes. The paper warns of potential herb-drug interactions, especially for medicines with narrow therapeutic windows.</p> </li> </ul> <h4>Using diabetes medications (insulin, sulfonylureas, others)</h4> <ul> <li>🩺</li> <li>Recommendation: If you are on glucose-lowering medication, monitor blood sugar closely when using medicinal clove extracts and consult your provider - dose adjustments may be needed to avoid hypoglycemia.</li> <li>Reasoning: Human pilot studies and animal work show clove polyphenol extracts can lower pre- and post-prandial glucose; when combined with antidiabetic drugs this could cause low blood sugar.</li> <li>Scientific_Study_Title: Water-soluble polyphenol-rich clove extract lowers pre- and post-prandial blood glucose levels in healthy and prediabetic volunteers: an open label pilot study.</li> <li>Scientific_Study_Authors: Vasanthi, H.R., et al.</li> <li>Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/31064377/</li> <li>Scientific_Study_Excerpt: <p>An open-label pilot trial gave 250 mg/day of a polyphenolic clove extract to healthy and prediabetic volunteers for 30 days and found statistically significant reductions in 2-hour postprandial glucose and some reductions in fasting glucose in higher-risk participants. In vitro assays showed the extract enhanced glucose uptake and inhibited hepatic glucose production. The study suggests clove extracts can meaningfully affect glucose handling and should be monitored with diabetes medications.</p> </li> </ul>