Hydrocortisone
Cortef, Solu-Cortef, Hydrocortone, Plenadren, Efmody, Alkindi, Hydrocortisone sodium succinate
Forms: Tablets, including modified-release ones, granules for children and an injectable form for emergencies and surgery. Creams, ointments and rectal foams are local forms with much smaller effects on the whole body.
Corticosteroids & ACTHPrescription onlyWADA S9 · prohibited in competitionEvidence: approved medicine
The body's own stress hormone, cortisol, made as a medicine: a short-acting glucocorticoid, not an anabolic steroid. Doctors use it mainly to replace cortisol the adrenals do not make.
Legal status: Prescription medicine; varies by country. WADA S9: prohibited in competition by oral, injectable or rectal routes.
What it gives
What people use it for and what the sources report. Strength is a general category from the literature: mild, clear or strong.
Purpose
Mainly a doctor's tool: replacement when own cortisol is lacking, a switch from long-acting glucocorticoids during a taper, extra cover for injury, illness or surgery, and emergency treatment of an adrenal crisis. An athlete with a medical need can apply for a TUE.
What people seek and what studies show
Not a performance drug, and trials give no reason to use it as one: in a placebo-controlled trial in women with adrenal failure, an extra dose before exercise did not improve aerobic capacity or exercise time. It is among the least potent and shortest-acting glucocorticoids, the usual choice for replacement; a doctor may also switch to it from long-acting ones during a taper. No data in athletes.
Effects
No clear training effect in the sources.
Evidence: Approved medicine — studied in people for its medical use
Possible side effects
Possible does not mean certain: whether they appear depends on dose, duration, individual response and monitoring. Below — what to watch for and how to notice it early.
13 possible side effects
level · how often it is reportedElevated
Suppression of own cortisol (adrenal glands)
possibleAbove own cortisol output for longer periods it suppresses the adrenals like other glucocorticoids, though less than long-acting, more potent ones; abrupt stopping can cause adrenal insufficiency.
How to notice: Tiredness, weakness, nausea, dizziness on standing or salt craving after stopping — the body’s own cortisol can take weeks to months to recover.
Elevated
Bone loss, fracture risk
rareOsteoporosis, fractures and aseptic necrosis of the hip or shoulder are on the label, as for the whole class; they can end a sports career.
How to notice: Usually silent until a fracture; in training, bone pain that starts earlier each session, with a tender spot, can be a stress fracture.
Elevated
Irritability, aggression, mood swings
rarePersonality change is possible; rarely severe depression or psychosis.
How to notice: Short temper, irritability, conflicts with others.
Moderate
Higher blood pressure
possibleAverage and higher doses can raise blood pressure through salt and water retention and lower potassium.
How to notice: Often silent; sometimes headaches, flushing, nosebleeds — a home monitor shows it. Heavy lifts briefly spike it even in healthy lifters.
Moderate
Insulin resistance / higher blood sugar
possibleLowers carbohydrate tolerance and can unmask latent diabetes; people on glucose-lowering drugs may need them adjusted by a doctor.
How to notice: Thirst, more hunger, energy crashes after carbs.
Moderate
Infections, slower wound healing
possibleWeakens immune defense and can mask signs of infection; chickenpox and measles can be severe in people who have not had them.
How to notice: More frequent or longer infections, thrush, cuts and wounds that heal slowly; fever can be masked.
Moderate
Anxiety, insomnia, night sweats
possibleInsomnia, euphoria and mood swings are listed on the label; poor sleep cuts into recovery between sessions.
How to notice: Trouble falling asleep, night sweats, restlessness; poor sleep lowers training quality and recovery.
Moderate
Muscle loss (catabolism)
rareAt high doses protein breakdown rises: muscle weakness, steroid myopathy and loss of muscle mass are on the label.
How to notice: Strength and fullness drop despite training; recovery slows.
Moderate
Tendon / ligament injury risk
rareTendon rupture, particularly of the Achilles, is listed on the label, as for other systemic glucocorticoids.
How to notice: Pain at tendon attachments under heavy load; in steroid-using bodybuilders about a quarter of ruptures followed such pain.
Moderate
Nausea, GI upset, pancreatitis risk
rareA peptic ulcer with bleeding or perforation and pancreatitis are possible, more so together with NSAIDs or aspirin.
How to notice: Nausea, fullness, constipation or diarrhea; often worse in hard or long sessions.
Moderate
Vision changes
rareLonger use can cause cataracts and glaucoma.
How to notice: Blurred vision, tinted vision, trouble seeing at night.
Low
Water retention / bloating
possibleSalt and water retention: puffiness and weight gain, a rounder face with longer high use.
How to notice: Puffy face and ankles, softer look, quick weight jumps.
Low
Injection pain, infection, oil cough
possibleThe injection can leave a dent in the skin at the site (tissue atrophy) or, rarely, a sterile abscess; a non-sterile injection can infect the site.
How to notice: Soreness, lumps; a short coughing fit right after an injection.
What the levels mean
Lowbackground — just be aware
Moderatewatch for signs
Elevatedneeds regular control
Highcritical — can be life-threatening or permanent
Level: general category from the literature, not your personal risk
How often
- common
- reported often
- possible
- reported in some people
- rare
- reported occasionally
How to lower the risks
For 13 of 13 possible side effects there are specific ways to lower the chance: everyday measures, supplements and options a doctor may consider. No measure removes a risk completely. Prescription medicines are listed only for a doctor to decide on, after tests — they have side effects of their own.
ElevatedSuppression of own cortisol (adrenal glands)
After more than a few weeks of use, never stop abruptly: a doctor plans a gradual taper and may check morning cortisol. Tell any doctor treating you, especially before surgery or with a serious illness.
Measure
How each option helps (2)
- Working with a doctor — A doctor plans a gradual taper after longer steroid use, may check morning cortisol and explains extra cover for injury, illness or surgery, so an adrenal crisis is less likely.
- Regular blood tests — A morning cortisol test shows whether own cortisol has recovered after glucocorticoids; it guides the taper but does not lower the suppression itself.
ElevatedBone loss, fracture risk
Strength and impact training, enough calcium and vitamin D from food, no smoking, enough energy for the training load (RED-S causes bone loss and stress fractures); with long-term use a doctor may order a bone density scan.
Measure
Supplement or OTC product
Only if a doctor prescribes
How each option helps (7)
- Avoiding alcohol and other liver stressors — Heavy drinking is a known risk factor for fractures and is part of the standard fracture-risk calculator; cutting it removes one added load on bone.
- Working with a doctor — With long use of glucocorticoids, thyroid hormone or very low estrogen, a doctor can order a bone density scan and start treatment before a fracture.
- Calcium — Enough calcium, best from food, is standard advice on glucocorticoids and for athletes eating too little; with vitamin D it cut stress fractures in recruits. Extra adds little if intake is enough.
- Vitamin D3 — Keeping vitamin D normal is standard advice on glucocorticoids and for athletes eating too little; with calcium it cut stress fractures in recruits. Extra adds little if levels are normal.
- Vitamin K2 (and vitamin K) — Fewer fractures were seen only in Japanese trials of a high-dose K2 form (MK-4) used there as a medicine; the MK-7 in most supplements has weak data for bone.
- Raloxifene — Approved for osteoporosis after menopause; in men on testosterone-blocking treatment it raised hip bone density. Only on a doctor's prescription; it raises clot risk. Has side effects of its own.
- Toremifene — In a large trial in men on testosterone-blocking treatment it halved new spine fractures and raised bone density, but clots were more common. Only on a doctor's prescription. Has side effects of its own.
ElevatedIrritability, aggression, mood swings
Good sleep, fewer stressors, tell someone close what to watch for. About one in three androgen users becomes dependent; if you cannot stop or never feel big enough, talk to a doctor or psychologist.
Measure
Supplement or OTC product
How each option helps (4)
- Avoiding alcohol and other liver stressors — Alcohol and other drugs on top of steroids explain much of the link between steroid use and violence.
- Sleep hygiene — Enough sleep lowers irritability and improves impulse control.
- Working with a doctor — Irritability that others notice, or hypomania, is a reason for a doctor's review: the drug behind it can be found and mental-health care arranged.
- Ashwagandha (Withania somnifera) — Small, mostly short trials show less perceived stress and anxiety; it was never tested for irritability or aggression from steroids or stimulants.
ModerateHigher blood pressure
Less salt, regular cardio, good sleep, home readings; if it stays high — a doctor, and a talk about maximal lifts.
Measure
Supplement or OTC product
How each option helps (22)
- Home blood-pressure monitoring — Persistently high resting readings mean seeing a doctor. For athletes, guidance prefers ARBs or ACE inhibitors, which don't limit exercise capacity; diuretics are banned in sport.
- Regular cardio training — In a meta-analysis of trials, endurance training lowered resting BP by about 8/5 mmHg in people with high BP and only slightly in those with normal BP.
- Working with a doctor — Diagnoses persistent hypertension and prescribes treatment when needed.
- Avoiding alcohol and other liver stressors — Regular drinking raises blood pressure; cutting it out lowers it.
- Coenzyme Q10 — Inconsistent: some analyses show a small systolic drop in cardiometabolic disease, but a Cochrane review found no clinically meaningful effect.
- Dietary nitrate (beetroot juice) — In trials of people with high blood pressure, beetroot nitrate lowered systolic pressure by about 5 mmHg; diastolic barely changed. Not a substitute for a doctor’s treatment.
- Magnesium — Meta-analysis of 34 trials in adults, not athletes: about 2 mmHg lower systolic pressure on average.
- Magnesium aspartate — On average magnesium lowers blood pressure only slightly — not a substitute for a doctor's assessment of high pressure found at a sports check.
- Magnesium carbonate — On average magnesium lowers blood pressure only slightly — not a substitute for a doctor’s assessment of high pressure found at a sports check.
- Magnesium chloride — On average magnesium lowers blood pressure only slightly — not a substitute for a doctor's assessment of high pressure found at a sports check.
- Magnesium citrate — On average magnesium lowers blood pressure only slightly — not a substitute for a doctor's assessment of high pressure found at a sports check.
- Magnesium gluconate — On average magnesium lowers blood pressure only slightly — not a substitute for a doctor's assessment of high pressure found at a sports check.
- Magnesium glycinate (bisglycinate) — On average magnesium lowers blood pressure only slightly — not a substitute for a doctor's assessment of high pressure found at a sports check.
- Magnesium L-threonate — On average magnesium lowers blood pressure only slightly — not a substitute for a doctor’s assessment of high pressure found at a sports check.
- Magnesium lactate — On average magnesium lowers blood pressure only slightly — not a substitute for a doctor's assessment of high pressure found at a sports check.
- Magnesium malate — On average magnesium lowers blood pressure only slightly — not a substitute for a doctor's assessment of high pressure found at a sports check.
- Magnesium orotate — On average magnesium lowers blood pressure only slightly — not a substitute for a doctor's assessment of high pressure found at a sports check.
- Magnesium oxide — On average magnesium lowers blood pressure only slightly — not a substitute for a doctor's assessment of high pressure found at a sports check.
- Magnesium taurate — Meta-analysis of trials: about 2 mmHg lower systolic pressure on average — too small to replace a doctor's assessment of high pressure found at a sports check.
- Omega-3 (fish oil, EPA/DHA) — Small drop of a few mmHg, mainly in people with untreated high blood pressure.
- Potassium — Trials: about 3.5 mmHg lower systolic, only in people with high BP. Dangerous with spironolactone, ARBs/ACE inhibitors or weak kidneys — a blood test first, a doctor decides.
- Taurine — Meta-analysis of 20 small trials: about 4 mmHg lower systolic pressure on average.
ModerateInsulin resistance / higher blood sugar
More daily movement, fewer fast carbs, check fasting glucose and HbA1c.
Measure
Supplement or OTC product
How each option helps (7)
- Glucose monitoring — Rising fasting readings reveal insulin resistance from GH or other drugs early.
- Regular blood tests — Fasting glucose, insulin and HbA1c catch rising blood sugar early — key with GH, its secretagogues and insulin.
- Regular cardio training — Improves insulin sensitivity — useful against the blood-sugar rise from GH and its secretagogues.
- Working with a doctor — Reads glucose markers and can start treatment such as metformin or advise cutting back GH, so a rise in blood sugar is less likely to go on untreated.
- Berberine — Meta-analyses: lower fasting glucose and HbA1c (about 0.6% in type 2 diabetes); smaller effect when glucose is normal.
- Alpha-lipoic acid — Small drops in fasting glucose, insulin and HbA1c in meta-analyses; no real counter to GH- or insulin-driven resistance.
- Psyllium husk fiber — Slows sugar absorption: lower fasting glucose and HbA1c, mostly in people with diabetes.
ModerateInfections, slower wound healing
Hand hygiene, enough sleep, vaccinations kept up to date (ask a doctor); no hard training or competing with fever; see a doctor early with fever or a wound that gets worse.
Measure
Supplement or OTC product
How each option helps (8)
- Hepatitis B vaccination — Very effective, but only against hepatitis B — not hepatitis C, HIV, abscesses or immunity lowered by corticosteroids. A blood test can show past infection or immunity; it need not delay vaccination.
- Sleep hygiene — Short sleepers caught colds more often in a virus-exposure study, and IOC advice on illness in athletes includes enough sleep; it does not offset corticosteroids.
- Sterile injecting equipment & needle-and-syringe services — Acts only on infections that come with injecting (skin infections, blood-borne viruses); it does nothing for the lowered immunity from corticosteroids, the main cause of this risk.
- Working with a doctor — A doctor can bring vaccinations up to date, treat infections early and keep in mind that fever can be masked on corticosteroids; their immune suppression stays.
- Probiotics — Some strains lower upper-respiratory infections in athletes (IOC: moderate support), strain-specific. Not shown to lower wound, skin or injection-site infections.
- Vitamin C (ascorbic acid) — Under heavy physical stress (marathon runners, soldiers) regular intake roughly halved colds in trials; no effect in most people, on wound healing or on corticosteroid effects.
- Vitamin D3 — A large analysis of trials found slightly fewer respiratory infections; the benefit is small and it does not offset corticosteroid immune suppression. A blood test shows if you are low.
- Zinc — Zinc acetate lozenges may shorten a cold (IOC: moderate support); they do not make colds less frequent, and too much zinc weakens immunity. Corticosteroid effects stay.
ModerateAnxiety, insomnia, night sweats
Sleep routine, no stimulants or caffeine (pre-workouts too) late in the day, magnesium or melatonin; late sessions and travel also disturb sleep.
Measure
Supplement or OTC product
How each option helps (19)
- Sleep hygiene — A steady routine and no late caffeine ease stimulant- and steroid-related insomnia; night sweats on trenbolone persist regardless.
- Working with a doctor — A doctor can find causes such as stimulants or thyroid hormone and offer insomnia therapy (CBT-I), the first-line treatment in guidelines; sleeping pills are not first choice.
- Avoiding alcohol and other liver stressors — Alcohol helps falling asleep but breaks up the second half of the night; without it sleep is steadier. It does not offset stimulants or steroids.
- Ashwagandha (Withania somnifera) — Small trials: slightly better sleep and less anxiety, more in people with insomnia; the evidence is low quality. It does not offset stimulants or night sweats on trenbolone.
- Glycine — Small trials show slightly better sleep quality and less next-day fatigue; not a sedative and not for anxiety.
- L-theanine — Small gain in subjective sleep quality; effects on anxiety are inconsistent. May smooth caffeine jitters but won't offset strong stimulants like clenbuterol.
- Magnesium — Three small, low-quality trials in older adults: falling asleep about 17 minutes sooner. No good data in athletes.
- Magnesium aspartate — In active men a zinc–magnesium aspartate product did not change measured sleep; in older adults three small trials found falling asleep about 17 minutes sooner.
- Magnesium chloride — Three small, low-quality trials in older adults: falling asleep about 17 minutes sooner. No good sleep trials in athletes.
- Magnesium citrate — Evidence that it improves sleep is weak, and there are no good sleep trials in athletes.
- Magnesium gluconate — Evidence that it improves sleep is weak, and there are no good sleep trials in athletes.
- Magnesium glycinate (bisglycinate) — In 155 adults with poor sleep, self-rated insomnia improved slightly more than on placebo (small effect). No data in athletes; it does not replace sleep habits.
- Magnesium L-threonate — Small industry-funded trials: some self-rated sleep measures improved; one found no change in tracker-measured sleep. No data in athletes.
- Magnesium lactate — Three small, low-quality trials in older adults: falling asleep about 17 minutes sooner. No good sleep trials in athletes.
- Magnesium malate — Three small, low-quality trials in older adults: falling asleep about 17 minutes sooner. No good sleep trials in athletes.
- Magnesium orotate — Evidence that it improves sleep is weak, and there are no good sleep trials in athletes.
- Magnesium oxide — Evidence that it improves sleep is weak, and there are no good sleep trials in athletes.
- Magnesium taurate — Three small, low-quality trials in older adults: falling asleep about 17 minutes sooner. No good sleep trials in athletes.
- Melatonin — Helps you fall asleep a little faster, especially with a shifted body clock; does not treat anxiety or night sweats.
ModerateMuscle loss (catabolism)
Enough protein and energy for the training load, keep heavy training, avoid overly aggressive deficits — they cost strength and recovery (RED-S).
Measure
Supplement or OTC product
How each option helps (5)
- Sleep hygiene — In a diet study, short sleep shifted weight loss from fat to lean mass; enough sleep may lower the chance of losing muscle in a deficit. Small study.
- Creatine monohydrate — With training it adds lean mass and strength (IOC and ISSN rank it among the best-backed supplements); in a small trial it kept arm muscle in a cast. It does not stop loss from drugs or a big deficit.
- Whey protein — Enough total protein is standard sports-nutrition advice for keeping muscle in a calorie deficit; whey is one easy source. It cannot fully offset drug-driven loss (thyroid hormone, glucocorticoids).
- Essential amino acids (EAA) — With low protein intake, may lower the chance of muscle loss by supporting protein synthesis; whole protein works as well, and neither removes the risk of drug-driven catabolism.
- HMB (beta-hydroxy-beta-methylbutyrate) — May slow muscle loss in older or untrained people and during bed rest; in trained athletes newer meta-analyses find little added effect.
ModerateTendon / ligament injury risk
Progress weights gradually — strength rises faster than tendons adapt; with persistent tendon pain, cut the load and see a sports physician.
Measure
Supplement or OTC product
How each option helps (3)
- Graded tendon loading with a physiotherapist — Treats tendon pain and rebuilds load tolerance; in a trial both heavy slow and eccentric loading gave lasting relief. No study shows it offsets the higher rupture risk on steroids.
- Working with a doctor — A quarter of tendon ruptures in steroid users followed local pain; a sports physician who sees that pain early can cut the load before a tear.
- Collagen peptides and gelatin — Gelatin with vitamin C raised a collagen-synthesis marker with exercise; whether this means fewer tendon injuries is unknown. Strength still rises faster than tendons adapt.
ModerateNausea, GI upset, pancreatitis risk
Smaller meals, enough fluid and fiber, test race-day food in training first; a doctor for severe abdominal pain.
Measure
Supplement or OTC product
How each option helps (14)
- Avoiding alcohol and other liver stressors — Alcohol irritates the stomach, adds to aspirin-related stomach bleeding and is a main cause of pancreatitis; avoiding it lowers that part of the risk, not drug nausea.
- Fluid & electrolyte management — Dehydration makes gut complaints in long or hot sessions more likely; drinking enough helps that part, not nausea from drugs or pancreatitis.
- Working with a doctor — Assesses persistent vomiting or severe belly pain (possible pancreatitis or gallstones), can add stomach protection to aspirin and adjusts GLP-1 treatment when nausea persists.
- Omeprazole and other proton-pump inhibitors (PPIs) — A doctor may consider it for heartburn, reflux, dyspepsia or ulcer cover with aspirin or NSAIDs (label, guidelines). It does little for nausea or diarrhea; long-term use has its own risks.
- Famotidine (H2 blockers) — Relieves and prevents occasional heartburn (label); it does not help nausea or diarrhea. For reflux damage or long-term ulcer cover a doctor usually turns to a PPI.
- Loperamide — Eases acute diarrhea, including on GLP-1 drugs (consensus), but not its cause; not for nausea or bloody stools. Fluids and salts still come first.
- Macrogol (polyethylene glycol laxative) — Eases constipation, including on GLP-1 drugs, with strong guideline backing in chronic constipation; not for nausea or heartburn. Rectal bleeding or worsening pain needs a doctor.
- Magnesium carbonate — An antacid for heartburn and indigestion (label), often combined with other antacids; it does not help nausea and may itself loosen stools. Not with weak kidneys.
- Magnesium citrate — In larger amounts a saline laxative for occasional constipation (label); not for nausea. It causes cramps and loose stools itself; ask a doctor first with kidney disease.
- Magnesium hydroxide — Labeled as an antacid for heartburn and a laxative for occasional constipation; short-term relief only, not for nausea. It can itself cause diarrhea; not with weak kidneys.
- Magnesium oxide — An osmotic laxative that eases constipation (conditional guideline advice); not for nausea or heartburn. It loosens stools itself; with weak kidneys blood magnesium can rise.
- Pancreatin + dimeticone (Pankreoflat) — Registered for heaviness and bloating after meals; it does not ease drug nausea, heartburn or aspirin stomach pain. Not with pork or cow's milk protein allergy or acute pancreatitis.
- Probiotics — May ease diarrhea, for example on GLP-1 drugs (consensus); in sport studies they mostly did not reduce exercise gut symptoms. Not for nausea or heartburn.
- Psyllium husk fiber — Soluble fiber eases constipation, including on GLP-1 drugs, and can firm loose stools; it does not help nausea or heartburn and can itself cause bloating and gas.
ModerateVision changes
Stop and see an ophthalmologist at any vision change.
Measure
How each option helps (1)
- Working with a doctor — Vision changes on clomiphene, tamoxifen, isotretinoin, PDE5 or GLP-1 drugs need prompt review; several labels advise stopping, which may limit lasting harm.
Low-level side effects
Water retention
Steady salt and water intake, cardio, check estradiol.
Measure
How each option helps (2)
- Regular blood tests — Estradiol, kidney, liver and protein tests help tell harmless retention from estrogen excess or organ trouble; testing alone lowers nothing.
- Working with a doctor — Tells harmless water retention from swelling due to heart, kidney or liver trouble; steroid labels warn that edema can come with heart failure.
Injection site
Sterile technique, never share needles, vials or pens; see a doctor for a hot, swollen site. If equipment was ever shared, test for HIV and hepatitis B/C and ask about hepatitis B vaccination.
Measure
How each option helps (3)
- Sterile injecting equipment & needle-and-syringe services — New sterile equipment and no shared vials make abscesses, HIV and hepatitis less likely; it cannot make a non-sterile product clean or stop oil cough. A hot, swollen site needs a doctor.
- Hepatitis B vaccination — Removes hepatitis B from the risks of shared equipment, but not hepatitis C, HIV or abscesses; guidance stresses it is no reason to relax sterile injecting.
- Working with a doctor — A doctor can treat a hot, swollen site before it becomes an abscess, test for HIV and hepatitis B and C and arrange hepatitis B vaccination; the risk of each injection stays.
Check-ups and blood tests
Which tests and check-ups to do and when. This is a guide — agree the exact schedule with a sports physician.
Baseline tests
your own starting values — every later result is compared with them
Complete blood count (hematocrit, hemoglobin)Endurance training dilutes the blood (“sports anemia”), dehydration concentrates it — test hydrated and rested, against your own baseline.infections
Kidney panel (creatinine, eGFR, cystatin C)Creatinine reads higher with big muscle mass or creatine; cystatin C barely depends on muscle and helps judge the kidneys in athletes.blood pressure
Fasting glucose, insulin, HbA1cblood sugar
Electrolytes (potassium, sodium, magnesium)Low sodium after long events mostly comes from drinking far beyond thirst; heavy sweating in the heat also costs sodium.
Home blood-pressure logMeasure seated and rested, not within 30 minutes after training, caffeine or smoking — they change the reading.blood pressure
Bone density scan (DXA) with long-term useIn athletes, a Z-score below −1 at the spine or hip, or a fall since the last scan, is a warning sign of low energy availability (RED-S, IOC tool).bones
While taking
about 4–6 weeks in, then every 6–8 weeks — agree the exact schedule with your doctor
Complete blood count (hematocrit, hemoglobin)Endurance training dilutes the blood (“sports anemia”), dehydration concentrates it — test hydrated and rested, against your own baseline.infections
Kidney panel (creatinine, eGFR, cystatin C)Creatinine reads higher with big muscle mass or creatine; cystatin C barely depends on muscle and helps judge the kidneys in athletes.blood pressure
Fasting glucose, insulin, HbA1cblood sugar
Electrolytes (potassium, sodium, magnesium)Low sodium after long events mostly comes from drinking far beyond thirst; heavy sweating in the heat also costs sodium.
Home blood-pressure logMeasure seated and rested, not within 30 minutes after training, caffeine or smoking — they change the reading.blood pressure
After stopping
4–8 weeks after stopping (later after long-acting injections), then until values return to baseline
Complete blood count (hematocrit, hemoglobin)Endurance training dilutes the blood (“sports anemia”), dehydration concentrates it — test hydrated and rested, against your own baseline.infections
Kidney panel (creatinine, eGFR, cystatin C)Creatinine reads higher with big muscle mass or creatine; cystatin C barely depends on muscle and helps judge the kidneys in athletes.blood pressure
Fasting glucose, insulin, HbA1cblood sugar
Morning cortisol (adrenal function)after stopping long or strong use; the doctor sets the timingadrenal glands
Every year
with regular or repeated use
Bone density scan (DXA) with long-term useIn athletes, a Z-score below −1 at the spine or hip, or a fall since the last scan, is a warning sign of low energy availability (RED-S, IOC tool).bones
Which doctors can help
Endocrinologistadrenal glands, bones, blood sugar
Psychotherapist / psychiatristmood
Cardiologistblood pressure
Ophthalmologistvision
Sports physiciantendons
Gastroenterologist / hepatologistdigestion
At home
- Home blood pressure: 2–3 times a week in the morning, keep a log
Get medical help at once if
- After stopping or missing it: severe weakness, vomiting, belly pain, dizziness or fainting, confusion — this can be an adrenal crisis; seek urgent care.
- Losing control of anger, thoughts of harming yourself or others — stop and get help today.
- Bone pain that worsens with running or jumping — stop impact training and see a doctor soon; groin or hip pain on impact — urgent check for a femoral-neck stress fracture.
- Sudden severe headache, vision changes, numbness or weakness on one side, trouble speaking — call your local emergency number.
- Sudden loss or blurring of vision, flashes, a curtain over sight — seek urgent care.
- A snap and sudden sharp pain in a tendon, inability to load the limb — stop training and get it examined.
- Severe upper-abdominal pain spreading to the back, with vomiting (urgent amylase/lipase test); pain under the right ribs with fever or yellow eyes; vomiting with no stool or wind; blood in stool after a long race — seek urgent care.
- Fever with chills, fast breathing, confusion, or redness that spreads quickly — seek urgent care.
In an emergency, call your local emergency number.
For women
Menstrual irregularities are possible. In pregnancy and breastfeeding a doctor weighs benefit against risk; babies of mothers given substantial doses are watched for low adrenal function.
Myth & fact
Myth
“Hydrocortisone is just natural cortisol, so it is harmless.”
Fact
It is the same hormone, but above the body's own level it carries the class risks its label lists: suppressed own cortisol, higher blood sugar, infections, bone and muscle loss.
Combinations
No specific combination notes for this substance yet. The stack check still adds up side effects that several substances share.
Sources
Beuschlein et al., J Clin Endocrinol Metab 2024: ESE/Endocrine Society guideline on glucocorticoid-induced adrenal insufficiency (opens in a new tab)DailyMed: Cortef (hydrocortisone) tablets label (opens in a new tab)Simunkova et al., Eur J Endocrinol 2016: pre-exercise hydrocortisone dose and short-term performance in women with adrenal failure (RCT) (opens in a new tab)Vernec et al., Br J Sports Med 2020: glucocorticoids in elite sport — performance, health risks, TUEs (narrative review) (opens in a new tab)DailyMed: Solu-Cortef (hydrocortisone sodium succinate) injection label (opens in a new tab)
Check how Hydrocortisone combines with your stack
Possible side effects by body system, combinations, how to lower the risks and which tests to do — free.
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