ResearchSafe

HCG + Letrozole combo for TRT‑induced estrogen spikes – need timing tips

Posted by jason482 in Protocols & Stacks - 1 points, 2 comments.

Hey folks, basically I’ve been on TRT for a bit now and hit the classic “water retention and mood dip” around week 6. My doc put me on 750 IU HCG twice a week to keep the testes happy, but the estradiol still creeps up to 45 pg/mL, and I get a bit of that joint achy feeling.

I started adding 1 mg Letrozole on the same days as the HCG injections, thinking the aromatase block would nip the estrogen surge. I reconstituted the HCG to 1,000 IU/ml in bacteriostatic water and draw 0.75 ml. Letrozole I crush into a powder and dissolve in 10 ml ethanol, then dilute with a bit of water to make a 0.1 mg/ml solution, taking 10 ml for a 1 mg dose.

So far, after three weeks I’ve noticed less bloating, my mood is a bit steadier and my morning weight is down a kilo. My blood work (just a quick snap test) shows estradiol hovering around 30 pg/mL now. No gynecomastia signs yet, and I haven’t felt any extra fatigue.

Anyone used this exact timing? Any tweaks on dose spacing or reconstitution math that make it smoother?

Comments

  • ethan_hrv: not gonna lie, i tried a similar hcg/letrozole schedule a few months back when my estradiol crept past 40 pg/ml on testosterone cypionate. 25 mg each) to avoid a sudden dip. 5 mg dose, no extra water dilution. after about six weeks my estradiol settled near 25 pg/ml, bloating went down and mood steadied, but i noticed a slight dip in libido on the letrozole days, so i sometimes skip the 2nd dose if mood feels off. just my rough experience, could be placebo.
  • jason482: appreciate the heads up, ethan. i’ve actually seen a tiny dip in libido on my letrozole days too, which is why i kept the 1 mg low and only on the HCG days. i’ll try your trick of skipping the second letro dose when mood feels off – might help keep the drive up without letting estradiol creep back. thanks for the real‑world tweak.

Community discussion - research and educational context only. Not medical advice.