Anabolic Steroids/Hormones Human clinical data

Winstrol (Injectable)

Winstrol Depot · Stanozolol Inj

3.4 days

Half-life

50–100 mg

Typical dose

EOD

Frequency

6–8 weeks

Cycle length

Injectable stanozolol suspension; micro-crystals give a long apparent peak.

Key takeaways

Injectable stanozolol suspension (Winstrol Depot); same DHT-derived molecule as oral Winstrol.
~3.4-day apparent half-life from slow-dissolving microcrystals; EOD injection.
Still 17-alpha-alkylated: hepatotoxicity drops vs oral, but HDL suppression stays severe.
No aromatization; joint pain is common as water and synovial lubrication drop.

🚧 Expanded guide coming soon. This compound has PK data and a source — a full overview, mechanism, and dosing guide is pending editorial review.

Reported dosing protocols

Protocols reported in research literature and clinic/community use — informational context, not a dosing recommendation.

Use case	Dose	Route	Frequency	Duration
Performance (community)	50–100 mg	IM	EOD	6–8 weeks

Pharmacokinetic summary

Model tier: Advanced (t½ + Cmax + Tmax + F)
Half-life: 3.4 days
Cmax: 600 ng/dL
Tmax: 7.0 days
Bioavailability: 100%
Typical dose: 50–100 mg

Harm reduction

Aromatizes: No
DHT derivative: Yes
Hepatotoxicity: mild
Injection frequency: EOD

Frequently asked questions

Injectable vs oral Winstrol — which is easier on the liver?

Injectable, somewhat. Skipping first-pass metabolism reduces hepatic exposure, so it rates mild here versus moderate for the oral. But stanozolol is 17-alpha-alkylated either way, and the lipid impact is just as bad by injection.

Why is Winstrol Depot a water suspension?

Stanozolol base isn't esterified, so it can't dissolve in oil the way esterified steroids do. It's milled into microcrystals suspended in water; the slow crystal dissolution is what creates the multi-day depot and the long apparent peak.

How long is injectable Winstrol detectable?

Longer than most expect: labs screen for 3′-hydroxystanozolol glucuronides by LC-MS/MS, and this entry estimates a 6–9 week window because the microcrystal depot extends detection roughly 2–3× versus the oral form.

References

PubMed (stanozolol PK)
Soma et al., J Vet Pharmacol Ther 2007 — stanozolol PK — Equine stanozolol pharmacokinetics; the published PK data behind the calibrated curve. Human values are modeled.

Winstrol: Oral vs Injectable (Stanozolol)

8 min read

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