Meridian Medica

01

Identity

Botanical Profile

Nepeta cataria L. — Aerial parts (leaves and flowering tops), harvested at peak bloom. Native to Europe and Asia; naturalized throughout North America; common garden herb and weedy escape; prolific self-seeder

Fresh herb: intensely aromatic — minty, camphoraceous, slightly earthy. Dried herb: softer minty aroma; pale green-grey. Tea: mild, pleasantly minty with light herbaceous bitter. Very palatable. Tincture: minty-aromatic with mild bitterness. Aroma diminishes significantly with prolonged storage or heat — freshness is essential.

Species Integrity

Catnip is generally not adulterated, though related Nepeta species (N. mussinii, catmint) are common ornamental plants with similar but less potent aromatic profiles. N. cataria is the medicinal species with highest nepetalactone content.

02

Compounds

Active Compound Profile

Nepetalactones (cis-trans and trans-cis isomers)

0.3–1.0% volatile oil; nepetalactones are 70–90% of the volatile fraction

Sedative/anxiolytic via GABAA potentiation; mild opioid receptor affinity; primary active compounds responsible for the euphoric cat response; insect repellent (more effective than DEET at equal concentrations against mosquitoes); antimicrobial

Iridoids (nepetalactone precursors, nepetalinic acid)

Present in non-volatile fraction

Anti-inflammatory; mild sedative contribution; precursors to volatile nepetalactone biosynthesis

Rosmarinic acid

1–3% dry weight

Potent antioxidant (superior to Vitamin E per weight); anti-inflammatory via 5-LOX and COX-2 inhibition; antiviral; MAO-inhibiting activity (mild); antiallergic

Flavonoids (luteolin, apigenin, hesperidin, linarin)

1–2% dry weight

Antioxidant; anti-inflammatory; mild anxiolytic (apigenin at GABAA BZD site); antispasmodic

Tannins

3–5% dry weight

Astringent; antimicrobial; mild antidiarrheal

Absorption

Fresh or freshly dried herb only: Nepetalactones are volatile and degrade rapidly with heat, age, and light exposure. The therapeutic effect is directly proportional to nepetalactone content.

03

Pathways

Mechanism of Action

★★★☆☆ GABAA Potentiation / Sedative-Anxiolytic Nepetalactones potentiate GABAA receptor activity, increasing chloride conductance and reducing neuronal excitability. The mechanism parallels benzodiazepine action at a distinct binding site without the addiction liability.

★★★☆☆ Digestive Antispasmodic Volatile oils and flavonoids relax smooth muscle in the GI tract, reducing intestinal cramping, gas, and colic. Mild carminative action releases trapped gas.

★★★☆☆ Diaphoretic (Fever Management) Catnip is a classic diaphoretic — promotes perspiration to lower fever naturally by increasing peripheral circulation and sweat gland activity

★★★☆☆ COX-2 / 5-LOX Inhibition (Rosmarinic Acid) Rosmarinic acid inhibits both cyclooxygenase-2 and 5-lipoxygenase, reducing prostaglandin and leukotriene production — dual anti-inflammatory pathway suppression

★★★☆☆ Mild Emmenagogue / Uterine Relaxant Mild stimulating effect on uterine smooth muscle at higher doses; antispasmodic at standard doses may actually relieve dysmenorrhea

04

Biomarkers

What It Moves in Your Labs

Biomarker	Direction	Target	Mechanism
Cortisol (morning serum)	↓ Decrease	10–20 mcg/dL (normal morning range)	Nepetalactone GABA potentiation reduces HPA axis activation; nervous system calming reduces cortisol drive
hs-CRP	↓ Decrease	<1.0 mg/L	Rosmarinic acid COX-2/5-LOX inhibition reduces systemic inflammatory markers
Sleep onset latency (subjective)	↓ Decrease	<20 minutes	GABAA potentiation reduces arousal and promotes sleep onset

05

Extraction

Extraction & Preparation

Fresh herb infusion (covered, 5–10 min): Good nepetalactone retention; rosmarinic acid fully extracted; flavonoids partially extracted

Solubility · Volatile; dissolve in ethanol and fat; partially captured in covered aqueous infusionMenstruum · 60% ethanol (fresh plant preferred: 1:2 fresh weight)Plant material · Fresh aerial parts at early bloom OR freshly dried herb (not old, odorless material)Maceration time · 2–4 weeks (agitate daily; keep cool to preserve volatiles)Ratio · 1:5 dried (1:2 fresh)

07

Dosing

Dosing Framework

For sleep: take 30–60 minutes before bed. Combine with other sleep herbs (passionflower, chamomile, valerian) for synergistic effect.

Dose 1

Mild: 1 cup tea (1 tsp dried herb) before bed or as needed

Start here; very safe; gentle entry into herbal nervine support

Dose 2

Standard: 2 mL tincture (1:5, 60% ethanol) 2–3x daily

Therapeutic dose for adults; increase to 3–4 mL at bedtime for sleep support

Dose 3

Acute: 4–5 mL tincture single dose

Maximum adult dose; short-term acute use; can repeat after 4 hours if needed

08

Synergies

Synergy Partners

★★★☆☆ Passionflower (Passiflora incarnata) Complementary GABAA activity via flavonoid binding; chrysin in passionflower adds to catnip's nepetalactone-mediated sedation; synergistic anxiolytic effect

★★★☆☆ Chamomile (Matricaria chamomilla) Apigenin at GABAA BZD site; anti-inflammatory; digestive carminative; flavonoid antispasmodic complements catnip's volatile oil antispasmodic

★★★☆☆ Lemon Balm (Melissa officinalis) GABA transaminase inhibition increases endogenous GABA; rosmarinic acid synergy (both herbs are high in rosmarinic acid); thyroid-modulating (mild); mood-elevating

★★★☆☆ Elderflower (Sambucus nigra flowers) Synergistic diaphoretic action in fever management; flavonoid antiviral + catnip diaphoretic = classic fever tea combination

★★★☆☆ Valerian (Valeriana officinalis) Valerenic acid GABAA potentiation is stronger than catnip's nepetalactone effect; catnip + valerian provides layered sedation from different volatile compounds

Signature Stack

THE NERVINE TRIAD
Components: Catnip aerial parts + Passionflower aerial parts + Lemon Balm aerial parts · Multi-pathway convergence: GABAA potentiation via nepetalactones (catnip) + flavonoid GABAA binding (passionflower) + GABA transaminase inhibition and rosmarinic acid (lemon balm) · This triad provides comprehensive gentle GABAergic support without the intensity of valerian or the sedative hangover risk of pharmaceutical sleep aids. Appropriate for Hashimoto's patients with chronic anxiety and insomnia driven by thyroid volatility, cortisol dysregulation, and autoimmune stress. · Practical integration: All three as dried herb in equal parts for sleep tea; or combined tincture (equal volume) 2–4 mL before bed.

09

Safety

Contraindications & Interactions

Avoid Pregnancy (high doses) Catnip has mild emmenagogue and uterotonic activity at high doses. Culinary and low therapeutic doses are generally regarded as safe. Avoid concentrated preparations during pregnancy.

Minor Sedative drug potentiation Catnip's GABAA activity may potentiate benzodiazepines, barbiturates, zolpidem, and other CNS depressants. Theoretical interaction at high doses.

Minor Pelvic inflammatory disease (PID) Traditional caution against using catnip in active pelvic inflammatory disease due to emmenagogue activity. Limited modern evidence for this concern.

Minor Pediatric dosing Catnip is one of the safest herbs for children and has traditional pediatric applications. However, dose reduction is required (Clark's rule or weight-based dosing).

11

Evidence

Evidence Base

★★★☆☆ Nepetalactone Sedation / Insect Repellent Moderate — Strong mechanistic data; traditional validation; limited modern RCTs in humans

★★★☆☆ GI Antispasmodic Moderate — Mechanistic basis strong; traditional use extensive; modern RCTs limited

★★★☆☆ Anxiolytic / Sedative Moderate — GABA mechanism established; human RCT data limited; traditional use extensive

★★★★☆ Rosmarinic Acid Anti-Inflammatory Strong — Rosmarinic acid has well-characterized anti-inflammatory mechanism; multiple human studies

★★☆☆☆ Diaphoretic / Fever Management Traditional — Extensive historical use; mechanism plausible; no modern RCTs

Evidence Gaps

The highest-value research gap for Meridian Medica: catnip's rosmarinic acid content has not been specifically studied in the context of Hashimoto's autoimmunity. Given that lemon balm (also high in rosmarinic acid) shows mild TSH-receptor-antibody modulation and rosmarinic acid broadly inhibits complement activation, a study measuring catnip's effects on TPO antibodies and anti-inflammatory biomarkers in Hashimoto's would establish whether this common garden herb merits inclusion in the anti-autoimmunity layer beyond its nervine and GI indications.

Quality Alert

Catnip adulteration is uncommon but degradation is the dominant quality concern:

12

Protocol

Protocol Integration

Layer 1: Hypothalamic / Autonomic — HPA axis, circadian rhythm, stress response

Layer 2: Systemic Nutritional Repletion — Micronutrient optimization, antioxidant defense

Layer 3: Gut Permeability / Microbiome — Tight junction repair, motility, SIBO management

Recipe Integration

Gentle Slumber Tea Blend

30g catnip in 100g blend; 1.5–2 tsp per cup before bed

Feed the Markers

Catnip appears in the following Meridian Medica protocol contexts: