Nolvadex by Zyvex Pharmaceuticals
What Is Nolvadex?
Nolvadex from Zyvex Pharmaceuticals is tamoxifen citrate in a 20 mg tablet, 100 tablets per pack. Tamoxifen is a SERM that blocks estrogen receptors at the pituitary, which removes the feedback that keeps natural testosterone shut down after a cycle.
In practice Nolvadex is the core of most post-cycle therapy: it restarts the HPTA and is also the standard first-line for gyno flare-ups, because blocking the receptor stops estrogen from stimulating breast tissue even when estradiol itself is fine. It is an anti-estrogen tool, not an AI - it does not lower estrogen, it blocks it.
Nolvadex Dosage
PCT dosing is daily, with the 20 mg tablet as the natural unit.
| Phase | Dose | Schedule |
|---|---|---|
| Weeks 1-2 of PCT | 40 mg | 2 tablets daily |
| Weeks 3-4 | 20 mg | 1 tablet daily Common |
| Gyno flare control | 20-40 mg | Daily until resolved |
One bottle of 100 covers several full PCT cycles at standard dosing.
Nolvadex Stacks
Tamoxifen is the core of post-cycle therapy. The stacks below show the Zyvex Pharmaceuticals cycles it typically follows.
| Stack | Goal |
|---|---|
| Nolvadex + Clomid | Dual SERM full PCT |
| Nolvadex after Deca 300 | PCT after a long-ester cycle |
| Nolvadex after Trenbolone 200 | PCT after a trenbolone run |
Nolvadex Side Effects
Tamoxifen is gentle for most, with effects that are known and mostly manageable.
- Hot flashes - common, tied to its estrogen-blocking action.
- Leg cramps - occasional at higher doses.
- Liver - long high-dose use needs monitoring.
This page is a product reference for research purposes. It does not replace medical advice, bloodwork review or local laws.
What is Nolvadex?
Nolvadex is the brand name for tamoxifen, a SERM that blocks estrogen receptors at the pituitary. Zyvex Pharmaceuticals supplies it as 20 mg tablets, 100 per pack.
What does Nolvadex do in PCT?
By blocking estrogen feedback, tamoxifen restores LH and FSH signaling, which restarts natural testosterone production after a cycle.
What is the right Nolvadex dosage for PCT?
A standard PCT runs 40 mg daily for the first two weeks, then 20 mg daily for two more weeks. One tablet is 20 mg.
When to start Nolvadex after a cycle?
With long esters, PCT starts about two weeks after the last injection. Short esters and orals clear faster, so PCT starts sooner.
How long does Nolvadex take to work?
Tamoxifen raises LH within days, and testosterone recovery is usually visible on bloodwork within 2-4 weeks of PCT.
How long does Nolvadex stay in your system?
Tamoxifen has a long half-life of 5-7 days, which is why a single daily dose is enough.
Nolvadex vs Clomid: which is better for PCT?
Both are standard SERMs. Nolvadex has a cleaner mood profile for many users; Clomid is often added for a dual-SERM approach.
Does Nolvadex have side effects?
Hot flashes and occasional mood changes are common. Rare visual disturbances are the serious watchpoint - stop and consult a doctor if they appear.
Can Nolvadex be used on cycle for gyno?
Yes. Tamoxifen blocks estrogen at the receptor and is a standard first-line for gyno flare-ups even while on cycle.
Where to buy Nolvadex online?
Zyvex Pharmaceuticals Nolvadex is available in this shop as 20 mg tablets, 100 per pack, with international and domestic shipping.
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