This page describes pharmacological agents that may have legal restrictions, side effects, and drug interactions in your jurisdiction. Information is for educational research only — consult a clinician before considering any compound.

High-risk compound

Surface here is educational only; do not use without medical supervision. Our editorial verdict is SKIP-FOR-NOW — current cost / risk / redundancy puts it below the line.

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Forskolin

Emerging

Forskolin is the textbook direct adenylyl-cyclase activator — beautiful mechanism, every pharmacology class uses it.

Aliases (8)

Coleus forskohlii · Coleonol · 7β-acetoxy-8 · 13-epoxy-1α · 6β · 9α-trihydroxy-labd-14-en-11-one · Plectranthus barbatus · FORSKOLIN

TYPICAL DOSE

250 mg

Daily

ROUTE

Oral (capsule)

Oral

CYCLE

8-12 weeks on, 4 weeks off

Continuous / daily

STORAGE

Room temp; cool dry place

Room temp

Overview

What is Forskolin?

Forskolin is a labdane diterpenoid extracted from Coleus forskohlii root, used in Ayurvedic medicine. Sold as a supplement for fat loss, testosterone, and cAMP-related metabolic effects.

Key Benefits

Modest fat-loss support in some trials, may raise testosterone and lean mass in men, supports cardiovascular and respiratory function. Used in eye drops for glaucoma research.

Mechanism of Action

Directly activates adenylate cyclase, increasing intracellular cAMP across many cell types. Elevated cAMP activates protein kinase A, hormone-sensitive lipase (lipolysis), and steroidogenesis. Receptor-independent.

Pharmacokinetics

PeakHalf-life

Approximate curve — visual aid only, not data-precise PK

▸Brand options4 known

Coleus forskohliiColeonolPlectranthus barbatusFORSKOLIN

StatusOTC dietary supplement (US, EU); not scheduled. Ophthalmic Rx historically (1980s, declined)

Peptide Interactions

luteolin (artichoke leaf extract):

Synergistic

The Marius/Romanian protocol. PDE4 inhibition prevents cAMP breakdown, complementing forskolin's cAMP production. Mechanistically coherent; clinical effect i…

bacopa-monnieri:

Synergistic

Both work on memory consolidation via different pathways (bacopa: cholinergic/serotonergic + dendritic remodeling; forskolin: cAMP-CREB-BDNF). No interaction…

caffeine (with caution):

Synergistic

Caffeine inhibits PDEs at high doses (above typical caffeine intake), so theoretically synergistic for cAMP. Practically, the additive cardiovascular load is…

citicoline / alpha-GPC:

Synergistic

Acetylcholine substrate; no direct interaction. Complementary to a memory-consolidation thesis. Already in V4.

bromantane (theoretical):

Synergistic

Both upregulate dopaminergic/BDNF tone via different mechanisms. No data on combination; not contraindicated.

PDE4 inhibitors at therapeutic doses (rolipram, roflumilast, apremilast, BPN14770):

Avoid

Direct overlap — forskolin raises cAMP from production side, PDE4 inhibitors raise it from degradation side. Combined cAMP signaling could amplify GI / emeti…

Antihypertensives (ACE-i, ARBs, beta-blockers, calcium channel blockers, alpha-blockers):

Avoid

Additive blood pressure drop. Not relevant for users in this archetype but flag for older users.

Anticoagulants / antiplatelets (warfarin, DOACs, aspirin, clopidogrel, high-dose fish oil):

Avoid

Additive bleeding risk.

Stimulants at high doses (amphetamine, methylphenidate):

Avoid

Additive cardiovascular load (HR, BP).

Strong CYP3A4 substrates with narrow therapeutic index:

Avoid

Forskolin has weak CYP3A4 inhibition; clinically modest but theoretical concern.

Pre-surgical:

Avoid

Discontinue 1-2 weeks before any surgery (bleeding + BP).

Quality Indicators

✓

Tested third-party COA

Reputable brands publish a Certificate of Analysis for identity, potency, and contaminant testing.

✓

GMP-certified manufacturing

Look for cGMP / NSF / USP certifications on the label.

Proprietary blends

Avoid products that hide individual ingredient amounts inside a "proprietary blend."

✗

No origin or sourcing info

Unbranded or no-COA capsules from anonymous sellers carry quality and adulteration risk.

What to Expect

Week 1
Baseline tolerability. Most chronic-use supplements have no acute signal.
Week 2-4
Subtle baseline shift — sleep quality, mood, recovery markers.
Week 4-8
Reach steady state. Re-assess subjective + objective markers.
Month 3+
Long-term maintenance dose if benefit confirmed; otherwise stop.

Side Effects & Safety

Common (>10% users):
- Mild GI upset (loose stools, nausea) — often diet-dependent (food helps).
- Headache (likely vasodilatory).
- Flushing / warmth.
- Mild orthostatic dizziness on standing (vasodilation + BP drop).
Less common (1-10%):
- Tachycardia / palpitations — not dangerous in healthy users but felt.
- Modest blood pressure drop — meaningful only at higher doses or in already-low-BP individuals.
- Increased gastric acid secretion — heartburn, dyspepsia. Caution in known peptic ulcer disease or active GERD.
- Bleeding (mild antiplatelet effect via cAMP-mediated platelet inhibition) — clinically minor unless stacked with anticoagulants.
- Possible mild hypoglycemia (rare).
Rare-serious (<1% but worth knowing):
- Severe hypotension when combined with antihypertensives.
- Atrial fibrillation / clinically significant tachyarrhythmia in susceptible individuals (very rare at supplemental doses).
- Bleeding events when stacked with warfarin / DOACs / high-dose fish oil.
- Theoretical hyperthyroid signaling (in vitro stimulates thyroid hormone release) — clinically unobserved at supplemental doses.
Specific watch periods: First 2 weeks for BP/HR effects (worst-case orthostatic). Recheck if the user ever stacks with caffeine + propranolol-free state — additive cardiovascular load with caffeine, opposing BP drop with propranolol if used PRN.