A compound from a Chinese medicinal orchid, licensed there as a medicine. Genuine short-term effects on headache frequency, on blood pressure added to standard treatment, and on confusion after heart surgery. Trial quality is low and almost all of it comes from one country. The longevity claim rests on worms and cell cultures. Real effects emerge within weeks. (Full Review)

Protocol

Standard oral dose

300–600 mg daily

600 mg daily (200 mg three times daily), tapered to 300 mg if not tolerated; most supplement products carry 300 mg

Split versus single dose

Split dosing

100 mg three times daily, or 100 mg morning and 200 mg evening; a four-to-six-hour half-life thins a single daily dose by evening

Best time of day

Evening-weighted

MT₁ activation and GABA enhancement favour night-time exposure, turning the main tolerability problem into the intended effect

Time to effect

Headache frequency

4–12 weeks

Headache frequency changes took four to twelve weeks in trials

Blood pressure

2–4 weeks

Blood-pressure effects appeared after two to four weeks of continuous use

Sedation

Same night

Fast for sleep and pain, slow for the rest

Benefits

High: Reduced headache burden in migraine and tension-type headache; additional blood-pressure reduction on top of standard therapy; protection of cognition and reduction of delirium after cardiac surgery

Medium: Improvement in depressive symptoms after stroke

Low: Better seizure control in epilepsy following stroke; relief of vertigo and dizziness

Speculative: Lifespan extension; sleep promotion; delay of cellular senescence in heart muscle; improved glucose control and blood lipids

Contraindications

Known hypersensitivity to gastrodin, Gastrodia elata or injectable excipients

History of hypersensitivity to two or more unrelated drugs

Pregnancy and lactation

Children and adolescents under 18

Severe liver impairment (Child-Pugh Class C)

Severe renal impairment (eGFR below 30 mL/min/1.73 m²) or dialysis

Symptomatic hypotension, or systolic persistently below 100 mmHg

Injectable form outside a licensed Chinese clinical setting

Key Interactions

Antihypertensive drugs (amlodipine, losartan)

Sedative-hypnotics, benzodiazepines (zolpidem, diazepam)

Melatonin, melatonin-receptor agonists (ramelteon)

Antiseizure medications (valproate, phenytoin)

Serotonergic antidepressants (fluoxetine, sertraline)

P-glycoprotein substrates (digoxin, dabigatran)

Sedating antihistamines (diphenhydramine)

Over-the-counter analgesics (ibuprofen): no interaction

Blood-pressure-lowering supplements (beetroot nitrate)

Sedative supplements (valerian, L-Theanine)

Antioxidant supplements at high dose (N-acetylcysteine)

Surgery and anaesthesia

Risk & Side Effects

Medium: Hypersensitivity and skin reactions; gastrointestinal adverse reactions; nervous-system and cardiac reactions

Low: Sedation and daytime drowsiness; additive blood-pressure lowering

Speculative: Blunting of adaptive antioxidant signalling; interference with dopamine handling

Monitoring

Marker	Target	Why
Seated blood pressure	110–125 / 70–80 mmHg	Detects the additive 7/5 mmHg fall
eGFR	>90 mL/min/1.73 m²	Unchanged gastrodin is excreted by the kidneys
Serum creatinine	0.7–1.0 mg/dL (men), 0.6–0.9 mg/dL (women)	Confirms the filtration estimate
ALT	<25 U/L (men), <20 U/L (women)	Aglycone clearance runs through the liver
AST	<25 U/L	Pairs with ALT to separate liver from muscle
Eosinophil count	0–200 cells/µL	Flags the dominant hypersensitivity risk
hs-CRP	<0.5 mg/L	Tracks the anti-inflammatory action claimed for gastrodin
Fasting glucose	75–86 mg/dL	Gastrodin is a glucoside with reported glucose effects
Resting heart rate	50–70 bpm	Detects reflex response to vasodilation

Cadence: Blood pressure twice daily through the first two weeks of escalation, then weekly; symptom diary weekly; blood panel at baseline and 12 weeks, then every 6 to 12 months if use continues

Qualitative Assessment

Headache days per month — days counted, not severity
Dizziness or unsteadiness episodes — frequency and duration, logged the same way weekly
Time to fall asleep, and night wakings — the fastest-responding marker, changing within days
Morning alertness — residual sedation after 10 a.m. signals too much or too late a dose
Cognitive clarity during demanding work — word-finding and task-switching, self-rated weekly
Mood and stress reactivity — rated weekly

Gastrodin for Health & Longevity

Protocol

Benefits

Risk & Side Effects

Monitoring

Qualitative Assessment