Prednisolone (incl. prednisone)
Deltasone, Rayos, Cortancyl, Orapred, Millipred
Forms: Prednisolone tablets and oral solutions; prednisone tablets, including delayed-release ones. Prednisolone eye drops are a local form.
Synthetic glucocorticoid, a cortisol-like anti-inflammatory hormone, not an anabolic steroid. Prednisone is turned into prednisolone in the liver, so both share this card.
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
Taken for its anti-inflammatory and anti-fatigue effect and in the belief that it boosts performance; glucocorticoids made up 21% of adverse findings in Brazilian men's football over 10 years. Medical use: inflammatory, autoimmune and allergic diseases.
What people seek and what studies show
Sought effects: less inflammation and fatigue, longer endurance. In small placebo-controlled lab studies, repeated intake lengthened cycling time to exhaustion (74.5 vs 46.1 min in 10 men; 66.4 vs 47.9 min in 9 women). A single dose did not, nor did repeated intake extend high-intensity hopping. Results differ between studies; there are no data in elite athletes.
Effects
Evidence: Approved medicine — studied in people for its medical use
Sought effects by goal (as reported)
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 reportedWhat the levels mean
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 10 of 13 possible side effects there are specific ways to lower the chance: everyday measures, supplements and options a doctor may consider. For the rest — general advice. No measure removes a risk completely.
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.
Strength and weight-bearing training, enough calcium and vitamin D from food, no smoking; with long-term use a doctor may order a bone density scan.
How each option helps (1)
- Calcium — With vitamin D it lowered stress fractures in female recruits; in older adults, supplement trials show weak and inconsistent effects on fractures.
Good sleep, fewer stressors, tell someone close to you what to watch for.
How each option helps (2)
- 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.
More daily movement, fewer fast carbs, check fasting glucose and HbA1c.
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 — Interprets glucose markers and treats early metabolic problems.
- 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.
Sleep routine, no stimulants late in the day, magnesium or melatonin.
How each option helps (5)
- Sleep hygiene — A steady routine and no late caffeine ease stimulant- and steroid-related insomnia; night sweats on trenbolone persist regardless.
- 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.
- Melatonin — Helps you fall asleep a little faster, especially with a shifted body clock; does not treat anxiety or night sweats.
Progress weights gradually — strength rises faster than tendons adapt.
Enough protein and calories, keep heavy training, avoid overly aggressive deficits.
How each option helps (2)
- Essential amino acids (EAA, incl. BCAA) — 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.
- Whey protein — Enough protein may lower the chance of muscle loss in a calorie deficit; it does not remove the risk, especially with drug-driven catabolism (e.g. thyroid hormone).
Hand hygiene, vaccinations kept up to date (ask a doctor), and seeing a doctor early with fever or a wound that gets worse.
Less salt, regular cardio, good sleep; home readings; a doctor if it stays high.
How each option helps (8)
- Home blood-pressure monitoring — Seated, rested readings on several days show your true BP; persistently high values are a signal to see a doctor.
- Regular cardio training — Regular aerobic training lowers resting BP by a few mmHg, more in people with high 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.
- Magnesium — Meta-analysis of trials: about 2 mmHg lower systolic pressure on average.
- Omega-3 (fish oil, EPA/DHA) — Small drop of a few mmHg, mainly in people with untreated high blood pressure.
- Taurine — Meta-analysis of 20 small trials: about 4 mmHg lower systolic pressure on average.
Smaller meals, enough fluid and fiber; a doctor for severe abdominal pain.
How each option helps (2)
- Working with a doctor — Assesses persistent vomiting or severe belly pain (possible pancreatitis or gallstones) and adjusts prescribed GLP-1 treatment when nausea persists.
- Pancreatin + dimeticone (Pankreoflat) — May ease heaviness and gas after meals; can cause nausea or diarrhea. Not for pork or cow's milk protein allergy (anaphylaxis reported) or early acute pancreatitis.
Stop and see an ophthalmologist at any vision change.
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
How each option helps (1)
- 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.
How each option helps (2)
- Regular blood tests — LH, FSH and testosterone show how deep suppression is and whether natural production has recovered afterwards.
- Working with a doctor — Assesses how deep suppression is and guides recovery afterwards, including fertility testing.
Check-ups and blood tests
Which tests and check-ups to do and when. This is a guide — agree the exact schedule with your doctor.
Which doctors can help
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.
- Sudden severe headache, vision changes, numbness or weakness on one side, trouble speaking — call emergency services.
- 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 — 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
Repeated intake also lengthened endurance in a study in women. It can cause menstrual irregularities. In pregnancy it is used only when a doctor weighs the risk; breastfeeding needs a doctor's decision.
Myth & fact
“Prednisolone is a steroid, so it builds muscle like anabolic steroids.”
It is a glucocorticoid, not an anabolic: it breaks down protein, and its label lists loss of muscle mass and steroid myopathy. WADA lists it in a separate class (S9).
Combinations
No specific combination notes for this substance yet. The stack check still adds up side effects that several substances share.
Sources
Possible side effects by body system, combinations, how to lower the risks and which tests to do — free.
Open the stack check