Kataka (Kataka (Payahprasadini, Nirmali))
Kataka, known as Strychnos potatorum, is an Ayurvedic herb traditionally used for water purification and treating various ailments. It is known for its astringent properties and clarifying effects.
Botanical name: Strychnos potatorum. Also known as: Clearing nut, Nirmali, Ambu Prasadana Phala, Netra Vikara Jit, Chakshushya, Payaha prasadi, Tiktaphala, Tetanakottai, Titan-kothayi, Chillachettu, Nirmali, Nirmali, Chetamperalu, Chilbing, Chilhara, Gajara, Nirwali, Katakam, Tetta, Tettamparap, Titramparala, Nirmali, Ingini.
Properties
Astringent action of tannins, COX-2 inhibition by brucine
Dosage
General: 1-3 grams of powder. As Vamak dravya (to induce vomiting): 6 grams. Indigestion and diarrhea: 3-4 grams of seed powder. Decoction: 40-50 ml. Extracts/Capsules: Standardized to 5% alkaloids, 250-500 mg capsule, once or twice daily.
Classical attributes
- Rasa: Kashaya (Astringent)
- Virya: ["Shita (Cooling)"]
- Vipaka: ["Katu (Pungent)"]
Benefits
- Grahi (Absorbent)
- Netrya (Good for eyes)
- Vishahara (Anti-toxic)
Traditional uses
- Atisara (Diarrhea)
- Netra Roga (Eye diseases)
- Mutra Vikara (Urinary disorders)
Dosha effects
- vata: balancing
- kapha: balancing
- pitta: balancing
Preparation methods
- Water purification: The seeds are traditionally used to purify water. Rub the seeds with water and add to turbid water sources. Crush 2-3 seeds per liter of water, stir, wait 2-3 hours, then decant the clear water.
- Powder: The seed can be taken in powder form.
- Decoction: A decoction of the seeds can be prepared.
- Paste: The root can be made into a paste for topical applications. Seed powder can be mixed with honey for various applications.
- Collyrium (Anjana): The seeds are rubbed in a clean stone, and the paste is applied as collyrium for eye diseases.
- Topical Paste: Seed powder mixed with turmeric and water can be applied to minor wounds or burns.
Contraindications
- Alkaloid Toxicity: Overdose may cause nausea, vomiting, and dizziness.
- Gastrointestinal Upset: Excessive tannins can cause constipation or gastric discomfort.
- Allergic Reactions: Although rare, watch for rash or itching with topical application.
- Pregnancy and Breastfeeding: Strychnos potatorum should be avoided by pregnant and breastfeeding women due to the presence of alkaloids.
- Interactions: Tannins may reduce the absorption of iron and zinc. Separate Strychnos potatorum from mineral supplements by 2-3 hours.
- Overdose can cause nausea or CNS excitement.
Side effects
- Overdose may lead to nausea, vomiting, and dizziness.
- Excessive tannins can cause constipation or gastric discomfort.
- Rare allergic reactions like rash or itching with topical application.
- It should be avoided in winter (cold season).
- High doses risk central nervous system excitation.
Interactions
- Tannins may reduce iron and zinc absorption. Separate from mineral supplements by 2–3 hours.
- Pregnant and breastfeeding women should avoid it due to the alkaloids.
Clinical evidence
Clinical studies show that Strychnos potatorum seed extract can provide faster relief from mild diarrhea. A clinical pilot study demonstrated a reduction in stool frequency with seed powder supplementation. More research is needed to validate these findings.
Ayurvedic karmas
- Grahi (Absorbent)
- Netrya (Good for eyes)
- Vishahara (Anti-toxic)
Classical clinical indications
- Atisara (Diarrhea)
- Netra Roga (Eye diseases)
- Mutra Vikara (Urinary disorders)