Most side effects are manageable if caught early and most reverse after stopping. The ones that do not: coronary plaque and heart muscle changes from years of use, male-pattern hair loss, and in women voice and clitoral changes. The pattern in the research is consistent: harm scales with dose, duration, number of compounds and absence of monitoring.
- In the HAARLEM cohort (100 users, one year), nearly all changes reversed after stopping; 4 of 100 had serious events during use.
- Long-term users (2+ years cumulative) had weaker heart function and more coronary plaque than non-users, scaling with exposure (Baggish et al., Circulation 2017).
- HDL falls and hematocrit rises in nearly everyone; both are measurable and both respond to action.
- Liver risk sits almost entirely with oral 17-alpha-alkylated compounds; injectable testosterone esters have little direct liver toxicity.
- Suppression of your own testosterone is universal during use; recovery is usual, slow, and confirmed only by bloodwork.
Organised by what you can do, not by how scary it sounds.
Heart and blood vessels
| Effect | Early sign | Do | Reverses? |
|---|---|---|---|
| Blood pressure up | Cuff reading, morning headache | Sodium, weight, cardio, sleep; physician treats if persistent | Yes |
| HDL down, LDL up | Lipid panel | Avoid or shorten orals, cardio, fibre | Yes, within weeks of stopping orals |
| Hematocrit up | Blood count, red face, headaches | Hydrate, cardio, physician-managed donation | Yes |
| Heart muscle and coronary plaque | None until late; echo shows it | Only prevention: defined periods, breaks, monitoring | Plaque no; function partly |
The 2017 Circulation study is the one to remember: 140 lifters, and those with two or more years of cumulative use had weaker left ventricles and more plaque, in proportion to exposure. The HAARLEM study, one cycle followed for a year, saw heart changes that mostly reversed. Short, monitored use is a different risk category from years of it.
Liver
Orals only, in practice. Enzymes rise, bile flow drops, rarely cysts or tumours. Fix: keep orals short or skip them, no alcohol alongside, check GGT and bilirubin, not just ALT/AST. Enzymes normalise after stopping; structural damage from prolonged oral use may not.
Hormones
- Suppression. Certain, in everyone. Testes shrink, sperm count falls. Reverses over months in most; confirm with bloodwork, treat if it stalls.
- Estrogen too high (aromatising compounds): water retention, moodiness, nipple tenderness. Do: estradiol test, physician adjusts. Early gynecomastia regresses; established needs surgery.
- Estrogen too low (over-use of aromatase inhibitors): joint pain, flat mood, low libido, worse lipids, weaker gains. Do: stop crushing estrogen; treat numbers, not fears.
- Prolactin up (some compounds): libido and erection problems. Test, physician manages.
Skin and hair
Acne on back, chest, face: common, reverses; keep skin clean, a dermatologist can treat it while you use. Male-pattern hair loss: accelerated if you are prone, does not return; if your family history says yes, DHT-heavy compounds are the wrong choice for you. Body hair increase in women: partly permanent.
Women
Everything above plus virilisation: voice, clitoral enlargement, facial hair, cycle disruption. Voice and clitoral changes are permanent once established. The protective rule is speed: first hoarseness or new hair is the signal to stop and reassess, not to wait for the next blood test. Full article.
Mood and mind
Drive and confidence up during use; irritability common; hypomania in a minority at high doses. After stopping: low mood, fatigue, low libido as testosterone bottoms out. Plan for it: keep training, keep sleep, keep people around you, and if it lasts beyond a few weeks it is a hormone number to check and a physician to see. Dependence is real in long-term users; defined periods with real breaks are the prevention.
What sets your risk
Dose, duration, number of compounds, monitoring. Every study that splits heavy from moderate exposure finds a gradient. Every study of unmonitored users finds harm that monitored patients rarely see. The principles that keep you on the right side of that line are not complicated.
Frequently asked questions
Which side effects are permanent?
Coronary plaque and some heart muscle changes from long use, accelerated male-pattern hair loss, established gynecomastia (needs surgery), and in women voice deepening and clitoral enlargement. Acne, water retention, suppressed hormones, lipid and blood pressure changes reverse.
What are the first signs something is wrong?
Resting blood pressure climbing, morning headaches, nosebleeds, breathlessness on stairs, nipple tenderness, dark urine, sleep falling apart, mood swinging. Each maps to a number on a blood test or a cuff.
Can gynecomastia be reversed?
Early tenderness and a soft lump can regress if the estrogen cause is corrected quickly with a physician. Firm, established tissue needs surgery. Speed matters.
Is roid rage real?
Irritability and mood swings are common; hypomania occurs in a minority at high doses; dramatic violence is rare and clusters in people with prior tendencies. Depression after stopping is common and deserves attention.
How do I lower the risk overall?
Fewer compounds, injectables over long orals, bloodwork on schedule, blood pressure daily, a stop rule set in advance, defined periods of use with confirmed recovery between. Read the safer-use principles article.
Sources
- Pope HG et al. Adverse health consequences of performance-enhancing drugs: an Endocrine Society scientific statement. 2014.
- Baggish AL et al. Cardiovascular toxicity of illicit anabolic-androgenic steroid use. Circulation, 2017.
- Smit DL et al. Health effects of androgen abuse: a review of the HAARLEM study. 2022.
- Kanayama G, Hudson JI, Pope HG. Long-term psychiatric and medical consequences of anabolic-androgenic steroid abuse. Drug and Alcohol Dependence, 2008.