Manaka (Mahapatra)

About

Manaka (Alocasia indica), also known as Giant Taro, is an herb used in Ayurveda for its cooling and swelling-alleviating properties. Modern research suggests it possesses antimicrobial, anti-inflammatory, hepatoprotective, antidiabetic, and anti-diarrheal activities. However, caution is advised due to the presence of calcium oxalate crystals, which can cause irritation.

Properties

Antimicrobial activity, Anti-inflammatory activity, Antioxidant activity, Hepatoprotective activity, Antidiabetic activity, Analgesic activity, Antidiarrheal activity

Dosage

The powder of the dried tuber is used in a dose of 3-5 grams. Fresh form is favored over dried because of potency issues. Micro-doses of dried rhizome powder have been used by some tribal healers to address intestinal worms in livestock, but this is controversial due to toxicity.

Classical attributes

• Rasa: Sweet
• Virya: ["Cooling"]
• Vipaka: ["Sweet"]

Benefits

• Alleviates swelling
• Alleviates blood disorders

Traditional uses

• Swelling
• Blood disorders
• Inflammation

Dosha effects

• vata: balancing
• kapha: balancing
• pitta: balancing

Preparation methods

• Topical Paste/Poultice: Fresh leaves are ground with a little water and applied to the skin for swelling or pain. A patch test is recommended due to potential skin irritation.
• Decoction: The powder of the dried tuber of *Alocasia indica* is mixed with rice powder and milk and boiled. This mixture is given in the condition of swelling of the body (anasarca).
• Juice: The fresh juice of the leaf is slightly heated and used as drops to treat earache and reduce swelling.
• Conjee: Conjee made of the dried stem (tubers) boiled with rice flour is given for piles.

Contraindications

• Pregnancy and lactation: Completely avoid during pregnancy and breastfeeding.
• Children under 12: Not recommended for children under 12, even for external use.
• Kidney disorders or oxalate sensitivity: Individuals with kidney disorders or sensitivity to oxalates should avoid any exposure to Alocasia indica.
• Internal use: Internal usage is rare and not widely recommended due to oxalate toxicity. If considered, strict Ayurvedic supervision is mandatory.
• Avoid in children and pregnant women.
• Do not consume raw parts internally.
• A topical test is advised for sensitive skin, as irritation is common.
• Never use dried leaf powder for inhalation or internal infusion, as it's not safe.

Side effects

• The plant contains calcium oxalate crystals, which can cause intense irritation.
• The sap might irritate the skin and eyes.
• Ingestion of the plant without proper preparation can be toxic.
• The stem contains calcium oxalate and other irritants that can numb and swell the tongue and pharynx, potentially leading to difficulty breathing and sharp throat pain.
• Other reported side effects from chewing or swallowing the plant include mouth pain, nausea, vomiting, and diarrhea.

Interactions

• Specific interactions with medicines and supplements are not detailed in the provided documents. However, it is generally advised to take Allopathic medicine first, wait for 30 minutes, and then take the Ayurvedic medicine, if both are advised together.

Active compounds

• Flavonoids
• Alkaloids
• Oxalates
• Quercetin derivatives
• Cyanogenetic glycosides
• Ascorbic acid
• Gallic acid
• Malic acid
• Oxalic acid
• Alocasin
• Amino acids
• Succinic acid
• β-lectins

Clinical evidence

Preliminary research on Alocasia indica includes in vitro and animal studies demonstrating antimicrobial, anti-inflammatory, anti-diarrheal, hepatoprotective, anti-diabetic, and analgesic effects. Human trials are limited.

Ayurvedic karmas

• Alleviates swelling
• Alleviates blood disorders

Classical clinical indications

• Swelling
• Blood disorders
• Inflammation

Frequently asked questions