Manjal Vembu (Yellow Neem)
Soymida febrifuga
About Manjal Vembu (Yellow Neem)
Manjal Vembu (Yellow Neem) (Soymida febrifuga) is a herb used in the Siddha Medicine tradition to help with Fever, Diabetes, Liver Support, and Inflammation. The leaves, bark and seeds are the parts traditionally used, used both internally and topically.
Botanical background
Soymida is a genus of flowering plants belonging to the family Meliaceae. It is found on the Indian subcontinent and Myanmar. It contains a single species, Soymida febrifuga.
Source: Wikipedia, via iNaturalist
Parts used
Conditions addressed
Tea / Infusion
- Steep 1–2 tsp of dried Manjal Vembu (Yellow Neem) in freshly boiled water for 5–10 minutes.
- Cover while steeping.
- Strain and drink.
Tincture
- Pack dried Manjal Vembu (Yellow Neem) into a jar and cover with 40–60% alcohol.
- Seal and steep for 4–6 weeks, shaking daily.
- Strain and store in a dark dropper bottle.
Powder / Capsule
- Grind dried Manjal Vembu (Yellow Neem) into a fine powder.
- Fill size 00 capsules or stir into smoothies or honey.
Pregnancy, Breastfeeding & Children
No herb-specific pregnancy/child safety research is documented for Manjal Vembu (Yellow Neem) in our references — the guidance below is based on its general effect category, not research on Manjal Vembu (Yellow Neem) itself. Always confirm with a midwife, doctor, or pediatrician.
Pregnancy
Use CautionThis herb is processed through the liver, which is already working harder during pregnancy — generally used cautiously and not at high/concentrated doses without guidance. This is a general, mechanism-based caution, not herb-specific research.
Breastfeeding
Use CautionLiver-processed compounds can appear in breast milk — generally used cautiously and in moderation.
Children
Use CautionA child's liver is still developing its full drug/herb-processing capacity — these herbs are generally used cautiously and at reduced, age-appropriate doses.
Contraindications
- Active liver disease — monitor liver enzymes with long-term use
- Diabetes medications — may enhance hypoglycaemic effect; monitor blood glucose closely
Warnings
⛔ Diabetes Medications
May enhance the blood sugar–lowering effect of insulin or oral diabetes medications. Monitor blood glucose closely.
⚠️ Liver Health
Some herbs used for liver conditions can be hepatotoxic at high doses. Have liver function monitored if using long-term.
⚠️ Allergic Reactions
Discontinue immediately if you experience rash, itching, swelling, or difficulty breathing.
⚠️ Not Medical Advice
This information is for educational purposes only. Always consult a qualified healthcare provider before using herbal remedies.
Drug & herb interactions
May affect blood sugar
Watch for: Insulin and oral diabetes medications (metformin, sulfonylureas)
Additive blood-sugar-lowering effects can risk hypoglycemia — monitor glucose closely.
Processed by the liver
Watch for: Any medication that is also processed by liver enzymes (ask your pharmacist — this includes many common prescriptions)
Can alter how quickly the body clears certain medications, raising or lowering their effective dose.
Where to find in nature
Native region
Indian subcontinent, Southeast Asia (naturalised in tropics globally)
Climate
Tropical and subtropical
Habitat
Dry to moist tropical forests; drought-tolerant. Widely planted across Asia, Africa, and the Americas. Common as a street tree in India.
🌿 To see Manjal Vembu (Yellow Neem) growing, visit botanical gardens, university plant collections, or specialist herb nurseries near you. If foraging in the wild, always work with an expert identifier — never consume a plant you are not 100% certain of.
Where to buy
In store
- South Indian grocery stores
- Siddha and Ayurvedic medicine suppliers
- Health food stores (Whole Foods, Natural Grocers, Holland & Barrett, GNC)
- Naturopathic clinics and integrative medicine practices
- Specialist herbal apothecaries and herbalist practices
Online
iHerb
Wide selection of standardised extracts, capsules, and powders with lab testing
Mountain Rose Herbs
Premium bulk dried herbs — certified organic, ethically sourced
Starwest Botanicals
Large selection of certified organic bulk herbs and powders
Herb Pharm
High-quality liquid extracts and tinctures, rigorous quality standards
Amazon
Convenient — verify brand certifications and check third-party testing
Etsy
Small-batch artisan herbalists, hand-harvested and wildcrafted herbs
Quality tips
When buying Manjal Vembu (Yellow Neem), look for: certified organic labelling, clearly stated country of origin, third-party lab testing for heavy metals and pesticides, and a batch expiry date. Standardised extracts offer consistent dosing; bulk dried herbs are more economical for regular use. Avoid very cheap, unlabelled products — quality varies enormously.