
As a personal trainer, I frequently work with clients, including athletes and the elderly, who utilize Prednisone for various health issues.
During a recent discussion with my doctor regarding a previous knee injury, we delved into the effectiveness of Prednisone and the time it takes to alleviate symptoms of inflammation.
I've gathered insights from both my doctor and scientific research in this article to give you clear information.
Quick Summary
- Prednisone typically works quickly, though the speed varies significantly based on the dosage and the specific condition being treated.
- Prednisone tablets come in two forms: the immediate-release (IR) version and a delayed-release (DR) formulation designed to take effect four hours after ingestion.
- Adverse effects are observed in up to 90 percent of patients who use corticosteroid medications for more than sixty days.
- In my opinion, adding high-quality pre-workout supplements into a healthy diet can help boost workout performance, accelerating progress toward fitness goals.
How Many Hours Does It Take Prednisone To Work?

Prednisone typically begins to work within one to two hours, provided the prescribed dose is in the form of an immediate-release tablet, according to WebMD [1].
Additionally, research from Drugs.com suggests that delayed-release tablets, used to deliver a high dose over an extended period, may take up to six hours for absorption into the bloodstream [2].
It's important to note that, similar to many other medications, realizing the full benefits of Prednisone in treating inflammation and other conditions may take a few days or weeks.
Most of my clients observed that the onset of prednisone's effects varies depending on the dosage and condition, with a duration of action lasting approximately 18 to 36 hours.
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- Do Steroids Help With Allergies?
- How Do Steroids Reduce Inflammation?
- What Happens if Steroid Is Not Injected Into the Muscle?
“Prednisone, like other corticosteroids, quickly lowers inflammation, which cuts down on pain, redness, and swelling. It also dials down your immune system. “
- Melinda Ratini, DO, MS at WebMD.com.
What’s The Half-Life?
The elimination half-life of prednisone is 3 to 4 hours in adults and 1 to 2 hours in children, according to the National Institute of Health [3].
This implies that, even at lower doses, prednisone remains detectable in drug tests for several hours, with PubMed research indicating detection for at least 24 hours in urine tests [4].
And since both oral and injected forms of this drug are banned, according to USADA, it can become a problem for athletes in competitive events [5].
What Is the Common Use of Prednisone?
Research from MedlinePlus suggests Prednisone is commonly used to treat inflammatory diseases like rheumatoid arthritis, lupus, or certain allergies [6].
However, a study published by PubMed indicates that, despite its medical purpose, prednisone can enhance exercise performance even after the initial dose [7].
This has led to its prohibition in sports and its potential detection in random drug tests.
Side Effects of Taking Prednisone Regularly

Regular use of Prednisone comes with significant physical and mental side effects, including:
- Confusion
- Muscle twitching or tightening
- Vision problems
- Depression
- Irregular heartbeat
- Sudden weight gain
Is It Important to Monitor Prednisone Intake?
It's important to closely monitor Prednisone intake under the guidance of a doctor.
I've worked with individuals who used this medication for short-term, legitimate injury treatment, but they all sought medical advice and only used it for a few weeks.
Personally, it's not a drug to be taken casually for potential performance benefits.
FAQs
What Is A Prednisone Used For?
Prednisone is used to treat inflammatory diseases and infections. It can trigger a reduced immune response but can have significant side effects and negative interactions with other drugs.
Is Prednisolone A Strong Steroid?
Yes, Prednisolone is a corticosteroid, primarily affecting the immune system, distinct from anabolic steroids that target testosterone and growth hormone for muscle growth.
References:
- https://www.webmd.com/arthritis/prednisone-arthritis
- https://www.drugs.com/medical-answers/long-prednisone-work-3562260/
- https://www.ncbi.nlm.nih.gov/books/NBK534809/
- https://pubmed.ncbi.nlm.nih.gov/31701669
- https://www.usada.org/spirit-of-sport/education/five-things-know-glucocorticoids/
- https://medlineplus.gov/druginfo/meds/a601102.html
- https://pubmed.ncbi.nlm.nih.gov/17805102/
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