HRT risks — an honest look

This guide is harm-reduction information. It is not medical advice. We provide it because most readers do not have access to an informed clinician.

The risks of HRT are real. They are also manageable for most people who take HRT carefully. This page is here so you can make an informed decision — not to scare you out of HRT, but to make sure you understand what you are accepting and what you can do to minimize the risks.

Cardiovascular risk

Estrogen, especially oral estrogen, modestly elevates the risk of blood clots (deep vein thrombosis, pulmonary embolism). The absolute risk for a healthy young adult is small but real.

What multiplies the risk:

• Smoking — combined with estrogen, smoking dramatically increases clotting risk. If you are starting HRT and you smoke, quit smoking before starting HRT if you can. Vaping is somewhat lower risk but still not zero.
• Sedentary lifestyle — sitting still for very long periods (long flights, very long bus rides) increases clot risk on estrogen.
• Existing clotting disorders (factor V Leiden, prothrombin gene mutation) — these are usually undiagnosed unless you have a family history. If a close relative has had unexplained clots, mention this to a clinician before starting estrogen.

Warning signs of a clot — get medical attention immediately:

• Sudden swelling, redness, or pain in one leg (DVT)
• Sudden chest pain or shortness of breath (pulmonary embolism)
• Sudden severe headache, vision changes, or weakness on one side (stroke)

Do not wait. These are emergencies.

Testosterone has its own cardiovascular profile — it affects cholesterol and increases red blood cell count. The risk of clots from testosterone alone is low, but very high hematocrit (over 54%) raises it significantly. Monitor with labs.

Liver risk

Cyproterone acetate (CPA) and bicalutamide are hepatotoxic. Most people tolerate them at standard doses with no liver problem, but a meaningful minority develop elevated liver enzymes, and a small number develop serious liver injury.

Mitigation:

• Use the lowest effective dose. This is one of the most important pieces of advice in this guide. CPA at 12.5 mg/day is dramatically less hepatotoxic than CPA at 50 mg/day.
• Get baseline liver function tests before starting. Establish a normal range for you.
• Recheck at 3 months, then yearly. If you have any unexplained fatigue, nausea, abdominal pain, or yellowing of the eyes or skin, get tested sooner.

If liver enzymes climb to 2–3× upper normal: reduce or stop the antiandrogen. Retest. If they continue to climb or do not return to normal, switch antiandrogens or stop entirely until you can see a clinician.

Meningioma risk (CPA-specific)

This is the most underreported risk of feminizing HRT in resource-limited settings, and it deserves its own section.

Long-term high-dose cyproterone acetate causes meningiomas — slow-growing brain tumors that arise from the membranes covering the brain. The risk increases sharply above a cumulative lifetime dose of about 10 grams.

At 12.5 mg/day: ~2 years to reach 10 grams cumulative. At 50 mg/day: ~200 days. At 100 mg/day: ~100 days.

This is why so much of this guide insists on low CPA doses. It is also why we recommend stopping CPA once estradiol alone is sufficient to keep testosterone suppressed, which is often the case after orchiectomy or after a long period of full estradiol levels.

Warning signs that warrant a brain MRI:

• New persistent headaches that are different from your usual headaches
• Vision changes (blurry vision, double vision, narrowed field of vision)
• Ringing in the ears
• Seizures
• New weakness, numbness, or balance problems
• Personality or memory changes

If you are on CPA and you develop any of these, get a brain MRI. Iraqi private imaging centers in Baghdad, Erbil, and elsewhere can do MRIs without a primary care referral. The cost is significant but it is not optional. A small meningioma caught early can often be managed; a large one missed for years can become very serious.

Other antiandrogens (bicalutamide, spironolactone) do not carry this risk.

Bone density risk

If your testosterone is suppressed and your estradiol is too low, your bones lose density. Over years, this can lead to osteoporosis.

Mitigation:

• Do not run low estradiol. If you are suppressing testosterone with an antiandrogen but only taking a token amount of estradiol, you are putting your bones at risk. Get serum estradiol into the 200+ pg/mL range.
• Weight-bearing exercise (walking, climbing stairs, light weights) protects bone density. This is not optional — it matters.
• Adequate calcium and vitamin D. A standard daily multivitamin covers this for most people.

After 5+ years on HRT, consider a DEXA scan if available (rare in Iraq).

Mental health risk

Hormones affect mood. The first 3–6 months of HRT, in either direction, are typically a period of intense emotional shift. This is normal. For most people, mood stabilizes.

Things to watch for:

• Worsening depression beyond what you started with. CPA, in particular, is depressogenic at high doses. If your mood drops sharply within weeks of starting CPA, the dose may be too high.
• Suicidal thoughts. If you start having thoughts of self-harm or suicide that you did not have before, please reach out — to a community member, to a friend, to anyone. Do not stop HRT cold turkey, but do not white-knuckle through it alone.
• Mood swings that disrupt your life. Some shifts are expected; daily extremes that affect your relationships and ability to function are not.

The right response to mental health worsening is rarely to stop HRT entirely — it is usually to adjust the dose, particularly the antiandrogen. CPA dose reductions often relieve depressive symptoms within weeks.

The risk of stopping cold

If you have been on HRT for some time and you stop suddenly — for travel, for fear of discovery, for any reason — your body experiences hormone withdrawal.

Estrogen withdrawal causes mood crashes and physical symptoms (similar to severe PMS or menopause): hot flashes, fatigue, irritability, depressed mood. These can last weeks.

Testosterone withdrawal causes fatigue, loss of muscle, decreased libido, and emotional flatness.

Recommendation: If you must stop HRT (e.g. travel, family discovery, supply interruption), taper rather than stop abruptly if you have time. Reduce the dose by half for a week, then half again, then stop. This is not always possible, but when it is, it makes the transition gentler.

If you stopped suddenly and feel terrible, the symptoms will pass. Drink water, sleep when you can, eat regularly, and reach out to community.

Fertility

HRT affects fertility, often permanently:

• Estrogen + antiandrogen suppresses sperm production. After 6+ months on full doses, sperm counts often do not recover even after stopping.
• Testosterone suppresses ovulation. Pregnancy on testosterone is unlikely but not impossible — testosterone is not a contraceptive.

If preserving fertility matters to you, sperm or egg banking before starting HRT is worth considering. Iraqi options for this are limited; the topic is worth its own conversation, which we are happy to have via the community channel.

A closing note

The risks of HRT are real, but they are not the whole picture. The mental health benefits of being able to live in a body that fits your gender are also real, and they are large. Untreated dysphoria has its own mortality. There is no zero-risk option — there is only the choice of which set of risks you accept.

The point of this page is to give you the information you need to manage the risks, not to make HRT seem catastrophic. Take the lowest effective doses. Get the labs. Watch for warning signs. Talk to community when something feels off.

You are not alone in this.