ED Resources

Erectile dysfunction while on testosterone replacement therapy is more common than most men realize. Despite having high testosterone levels, several mechanisms can cause or worsen ED during TRT.

The most frequent culprits include estrogen imbalance (both too high and too low), changes in nitric oxide signaling, hematocrit elevation thickening blood and reducing circulation, and psychological factors from adjusting to therapy.

High estradiol from testosterone aromatization can cause water retention, mood changes, and soft erections. Conversely, crashing estrogen with too much AI is one of the most common mistakes and leads to complete loss of libido and erectile function.

If you're experiencing ED on TRT, the first step is comprehensive bloodwork — specifically checking estradiol (sensitive assay), free testosterone, prolactin, and hematocrit. A steroid-friendly clinic will know exactly what to look for.

Crashed estrogen (low E2) is one of the most miserable experiences on TRT and is almost always caused by taking too much aromatase inhibitor (AI). Many clinics over-prescribe AI, leading to this preventable problem.

Key symptoms include: completely flat libido, dry and achy joints, fatigue and lethargy, depression and brain fog, inability to get or maintain erections, dry skin and lips, urinary frequency, and insomnia.

If you suspect crashed estrogen, stop your AI immediately and let levels recover naturally. This can take 1-3 weeks depending on the AI used. Anastrozole clears faster than exemestane since exemestane is a suicidal inhibitor.

Many modern TRT protocols have moved away from routine AI use entirely. A good clinic will optimize your injection frequency (daily or EOD micro-dosing) to minimize aromatization rather than relying on AI to manage estrogen.

Trimix is an injectable medication containing three vasodilators — alprostadil, papaverine, and phentolamine — that is injected directly into the penis to produce an erection. It works regardless of the cause of ED.

Unlike oral medications like Cialis or Viagra, Trimix works directly on the erectile tissue and doesn't require sexual arousal or intact nerve pathways to function. This makes it effective for men who don't respond to PDE5 inhibitors.

Trimix is available by prescription and must be compounded by a specialty pharmacy. It requires refrigeration and has a limited shelf life. Most clinics that prescribe it will teach you the proper injection technique.

Dosing is highly individual and typically starts very low to avoid priapism (an erection lasting more than 4 hours, which is a medical emergency). Your clinic will titrate the dose upward gradually until the right response is achieved.

Human Chorionic Gonadotropin (HCG) mimics luteinizing hormone (LH) and stimulates the testes to produce testosterone and other hormones, including pregnenolone and progesterone — neurosteroids important for libido and well-being.

Many men on TRT experience a decline in libido even with adequate testosterone levels. This is often because exogenous testosterone shuts down LH, eliminating intratesticular testosterone production and the downstream neurosteroids that support sexual desire.

HCG at typical doses of 250-500 IU 2-3 times per week can restore these pathways, improve libido, maintain testicular size, and preserve fertility. It's one of the most common and effective ancillaries in TRT protocols.

Not all clinics prescribe HCG due to regulatory changes. Steroid-friendly clinics are more likely to include it in their protocols or offer alternatives like enclomiphene or gonadorelin for men who need this additional support.