Gojihva

Names and identification

Language	Name
English	Gojihva
Latin/Botanical	Onosma bracteatum Wall.

Key Phytochemical Constituents

• Shikonins and onosmins (naphthoquinones - most significant)
• Naphthazarins and benzoquinones
• Lycopsamine and supindine viridiflorate (pyrrolizidine alkaloids in leaves)
• Choline and tannins
• Flavonoids and phenolic compounds
• Saponins and glycosides

How does it work?

• Anti-asthmatic effect through mast cell stabilization and reduction of bronchial hyper-responsiveness via hydro-alcoholic extract
• Analgesic activity through dose-dependent increase in latency period (258.9% at 500 mg/kg at 3h) via central pain modulation
• Anticancer mechanisms through shikonin/onosmin-mediated topoisomerase inhibition, ROS generation, and apoptosis induction
• Anti-inflammatory action via inhibition of pro-inflammatory mediators and stabilization of lysosomal membranes

Which traditional uses are supported by research?

• Anti-asthmatic and respiratory tonic (Shvasa-hara) - validated through mast cell stabilization and bronchial hyper-responsiveness reduction studies
• Cooling and antipyretic (Jvarahara) - confirmed antipyretic activity in traditional Unani and Ayurvedic usage
• Throat and oral health (Mukha-roga) - supported by antimicrobial and anti-inflammatory studies
• Cardiotonic (Hridya) - traditional claim as heart tonic partially supported by pharmacological studies

What do recent clinical trials show?

• Jabbar AA, Abdullah FO, Hassan AO and others 2022. Ethnobotanical, Phytochemistry, and Pharmacological Activity of Onosma (Boraginaceae): An Updated Review. Molecules (Basel, Switzerland). PMID 36557820 · doi:10.3390/molecules27248687
  Comprehensive review identifying shikonins and onosmins as the most significant bioactive constituents with potent anticancer, anti-inflammatory, and antimicrobial properties.
• Kumar A, Attri S, Kaur S and others 2022. Onosma L. as a source of anticancer agents: phytochemistry to mechanistic insight. Exploration of targeted anti-tumor therapy. PMID 36338520 · doi:10.37349/etat.2022.00109
  Reviewed anticancer potential of Onosma species with mechanistic insights into naphthoquinone-mediated apoptosis induction and cell cycle arrest in cancer cells.

1 further claim previously listed here could not be traced to a published paper and has been removed. An absence here means we could not identify the source, not that no work exists.

Recent safety updates

• Contains pyrrolizidine alkaloids (lycopsamine, supindine viridiflorate) in leaves which are hepatotoxic with chronic use; should not be used long-term internally
• External use generally considered safe; internal use should be limited in duration and supervised; contraindicated in liver disease patients

Dosage forms and preparation

Dosage Forms: Swarasa (fresh juice), Churna (powder), Kashayam (decoction), Tablet, Capsule, Lepa (external paste)

Standard Dosage: 10-20ml fresh juice; 3-6g powder twice daily; 50-100ml decoction twice daily; 500mg extract capsule twice daily

Bioavailability: Onosma bracteatum (Gojihva) contains pyrrolizidine alkaloids (PAs - safety concern), flavonoids, and phenolic acids. Flavonoid glycosides have moderate bioavailability (15-25%). PAs are well absorbed orally and undergo hepatic activation to toxic pyrrolic metabolites - this is a significant safety consideration. Traditional preparations (aqueous decoction/Kashayam) extract fewer PAs than alcoholic preparations. The mucilaginous nature of the plant may slow GI absorption. Enhancement not applicable due to PA safety concerns - focus should be on PA reduction strategies.

Optimal Timing: After meals with warm water for respiratory and urinary conditions; traditionally used as a component in compound formulations rather than standalone

Standardized Extract: Aqueous extract with PA content verified below regulatory limits (<1 microgram PA/day at recommended dose). Total flavonoid content NLT 1.5% (as quercetin equivalent). Extract ratio 5:1. HPTLC fingerprint required.

Shelf Life: 1.5 years (powder); 2 years (tablet/capsule); fresh juice: use within 6 hours

Storage: Airtight containers below 25 deg C, protected from moisture and light. Label must carry appropriate PA-related warnings if applicable to jurisdiction.

Marker Compounds: Pyrrolizidine alkaloids (PA content - SAFETY MONITORING, must be below limits), Anchusine (naphthoquinone), Onosmin, Beta-sitosterol, Flavonoids, Mucilage content

Extraction Methods

• Aqueous decoction (preferred - lower PA extraction)
• Hydroalcoholic extraction (50:50) - with PA monitoring
• Fresh juice expression
• Cold water maceration for mucilage-rich fraction

Synergistic Combinations

• With Vasa (Adhatoda) for respiratory and bronchial conditions
• With Yashtimadhu for demulcent and anti-tussive synergy
• With Behman (Centaurea behen) for cardiac tonic combination (Unani use)
• With Khatmi (Althaea) for soothing urinary tract conditions