Rasa Panchaka — Five Pharmacological Properties

The Doctor's Toolkit

When a senior Ayurveda physician decides which dravya to prescribe, she's reading five attributes against the patient's vikriti:

1. **Rasa** — what the substance tastes like to the patient
2. **Guna** — its 20 binary qualities
3. **Veerya** — its potency (sheeta or ushna)
4. **Vipaka** — what it transforms into after digestion
5. **Prabhava** — its specific unique action

This is *rasa panchaka*. Master it and pharmacology becomes reasoning rather than memorisation.

1. Rasa — the Six Tastes

Rasa is the patient's first encounter with the dravya. The 6 rasas, their mahabhuta composition, and doshic effect:

**Clinical pattern**: madhura-amla-lavana (the "lower three") pacify vata. Katu-tikta-kashaya pacify kapha. Pitta is pacified by madhura-tikta-kashaya.

2. Guna

The 20 gurvadi gunas (covered in Padartha Vigyana). Briefly: each dravya is characterised by where it falls on 10 binary scales (guru-laghu, sheeta-ushna, etc.). Combined with rasa, guna gives a refined doshic prediction.

3. Veerya — Potency

Veerya is the **dominant pharmacological force** of the dravya. Most texts recognise two veeryas:

• **Sheeta veerya** — cooling. Examples: chandana, ushira, gokshura, bala
• **Ushna veerya** — heating. Examples: shunti, pippali, hingu, guggulu

Some texts expand to 8 veeryas (sheeta-ushna-snigdha-rooksha-guru-laghu-mridu-tikshna) but the binary sheeta-ushna remains the working clinical distinction.

**Veerya often dominates rasa**: a sweet (rasa) substance with ushna veerya will not always pacify pitta because its veerya may aggravate pitta.

4. Vipaka — Post-Digestive Effect

After jatharagni-bhutagni processing, the dravya transforms. The three vipakas are:

• **Madhura vipaka** — most madhura, amla, lavana rasa dravyas; effect: brimhana, snehana
• **Amla vipaka** — amla rasa dravyas; effect: deepana, pittakara
• **Katu vipaka** — katu, tikta, kashaya rasa dravyas; effect: lekhana, rooksha

**Why vipaka matters**: the dravya's effect at the *dhatu level* is determined by vipaka, not by rasa. A sweet dravya with katu vipaka has a different long-term tissue effect than one with madhura vipaka.

5. Prabhava — Specific Action

Some dravyas show effects that **cannot be explained** by their rasa, guna, veerya, vipaka. These are *prabhava*-driven:

• **Danti** (Baliospermum montanum) — virechana action by prabhava
• **Madanaphala** — vamana action by prabhava
• **Snake-bite mantra** dravyas — specific anti-venom action by prabhava
• **Chyavanaprasha** — rasayana effect overall by prabhava

Prabhava is the residual category — when the four attributes don't predict the dravya's main action, prabhava takes over.

Clinical Reasoning Example

Patient: chronic pitta-pradhana hyperacidity.

Selecting **shatavari** (Asparagus racemosus): - Rasa: madhura, tikta — pacifies pitta ✓ - Guna: snigdha, guru, sheeta — pacifies pitta ✓ - Veerya: sheeta — strongly pacifies pitta ✓ - Vipaka: madhura — soothes inflammation ✓ - Prabhava: stanyajanana (lactogenic), rasayana

This is rasa-panchaka reasoning. Every choice is defensible from these five attributes.

Self-test

• List 6 rasas with their dominant mahabhuta.
• Differentiate veerya and vipaka with one example each.
• Patient with chronic kapha-induced rhinitis — what rasa-guna-veerya-vipaka profile should your dravya have?
• Give 3 examples of prabhava and explain why each is classified as such.