Adrafinil vs Gotu Kola (Centella asiatica)

Mechanism

Inactive prodrug that is hepatically metabolized to modafinil (via hepatic amidase enzymes) and its inactive acid metabolite modafinilic acid. The active metabolite modafinil then exerts its effects as a DAT inhibitor with downstream orexinergic, histaminergic, and noradrenergic activation. Conversion is incomplete — approximately 33-50% of adrafinil is converted to modafinil, with the remainder forming inactive metabolites. The hepatic first-pass metabolism means onset is delayed (60-90 minutes vs. 30-60 minutes for modafinil).

Standard Dosing

300-600 mg once daily (for educational context — unregulated prodrug of a prescription medication)

Timing

Early morning on an empty stomach for faster hepatic conversion. Onset delayed 60-90 minutes. Avoid afternoon/evening dosing due to long effective duration.

Cycle Duration

Short-term or intermittent use strongly preferred. Avoid continuous daily use exceeding 3 months without liver function monitoring.

Side Effects

• All modafinil side effects apply
• Elevated liver enzymes (ALT/AST)
• Potential hepatotoxicity with chronic use
• Skin reactions
• GI distress (more common than with modafinil due to hepatic metabolism)

Contraindications

• Hepatic impairment of any severity
• Concurrent hepatotoxic medication
• All contraindications for modafinil apply (cardiac conditions, anxiety disorders, pregnancy)
• History of liver disease or elevated liver enzymes

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Mechanism

Pentacyclic triterpenes — asiaticoside, madecassoside, asiatic acid, and madecassic acid — provide neuroprotection through multiple mechanisms: inhibition of acetylcholinesterase activity and enhancement of cholinergic transmission; reduction of phospholipase A2 (PLA2) activity to attenuate neuroinflammation; protection against beta-amyloid aggregation and tau hyperphosphorylation; and upregulation of BDNF to promote neuronal growth and synaptic plasticity. Asiaticoside enhances collagen synthesis and wound healing, while asiatic acid activates the MAPK/ERK pathway to promote neurite outgrowth.

Standard Dosing

500-1000 mg/day of standardized extract (35-45% triterpenes) or 750-1500 mg/day of whole herb extract

Timing

Morning or split morning/afternoon. With or without food. Acute mood effects (alertness, reduced anger) noted within 1 hour of dosing.

Cycle Duration

Ongoing; traditional use suggests no cycling required. Clinical trials run 2-6 months.

Side Effects

• GI discomfort
• Drowsiness
• Headache
• Skin irritation (topical use)
• Hepatotoxicity (rare, with prolonged high-dose use)

Contraindications

• Pregnancy (traditionally contraindicated; may have emmenagogue effects)
• Hepatic disease (rare hepatotoxicity reported)
• Scheduled surgery (may affect wound healing dynamics)

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