Overview

"Androstadienol" is an umbrella term in the pheromone community that covers multiple positional isomers — molecules with the same formula but double bonds at different positions. This distinction matters because the isomers may have different effects and different receptor interactions.

Pharmacology

What It Is

Androstadienol is a C19 androstadiene alcohol — two double bonds and a 3β-hydroxyl group. Molecular formula C₁₉H₂₈O, MW 272.43. It is the reduced form of androstadienone (hydroxyl at C-3 instead of ketone), analogous to how androstenol is the reduced form of androstenone. The two double bonds provide high volatility.

Isomer Chemistry

The "positional isomer" distinction refers to where the double bonds sit:

  • 4,16-androstadien-3β-ol (fasedienol, CAS 23062-06-8) — double bonds at C-4 and C-16. Referenced in Erox/Pherin patents. Currently in Phase 3 clinical trials (VistaGen/Biogaia) for social anxiety disorder at intranasal doses of just 0.5-3.2 mcg — pharmacological validation of pheromone-like activity.
  • 5,16-androstadien-3β-ol (CAS 1224-94-8) — double bonds at C-5 and C-16. The form available from chemical suppliers (Steraloids catalog A0565).

Detection

Detected via VNO. Alpha Dream confirmed that the 4,16 isomer produces electrovomeronasogram responses similar to androstadienone. The 16-ene double bond (shared by both isomers) is the key structural feature for VNO receptor binding — the same position responsible for pheromone activity in androstenone and androstenol.

The Two Main Isomers

Isomer IUPAC CAS Notes
4,16-androstadien-3β-ol androsta-4,16-dien-3β-ol 23062-06-8 Alpha Dream called this the "proper" androstadienol. Referenced in Erox patents. Same compound as fasedienol (PH94B), currently in Phase 3 clinical trials for social anxiety.
5,16-androstadien-3β-ol androsta-5,16-dien-3β-ol 1224-94-8 The isomer available from Steraloids (catalog A0565). PubChem CID 150900. The form most community members actually obtained when ordering "androstadienol."

Alpha Dream (Chris) clarified in the PheroTruth thread that the 4,16 isomer is the one referenced in pheromone patents and showing electrovomeronasogram responses similar to androstadienone. However, most community members who ordered "androstadienol" from chemical suppliers received the 5,16 isomer, which is the commonly available form.

Sourcing and Cost

Androstadienol was notoriously difficult and expensive to obtain:

  • Synthesis cost: ~$4,000 per batch (2011, per Alpha Dream)
  • Historical pricing: ~$300 for 15mg dropper bottle from AD (early 2000s)
  • Sources: Steraloids (catalog A0565, $95/10mg), China suppliers
  • Alpha Dream was planning synthesis with 6-8 month timelines (2011)
  • idontknow reported beta-androstadienol in Love Potion formulas (Heart Throb, Super Sexy for Men, Intellectual Man) but not sold individually
  • Multiple PheroTruth members (kmacc45, dexter, Fly So Hi) actively sought the compound but struggled to find sources