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Published on: 2/28/2026
Steroid side effects happen because prescription corticosteroids raise cortisol that influences nearly every system; this can lead to appetite and weight gain, mood or sleep changes, fluid retention, higher blood sugar, increased infection risk, and sometimes signs of Cushing's, with certain red flags needing urgent care.
There are several factors to consider. See below for medically approved steps such as using the lowest effective dose, tapering rather than stopping, and monitoring blood sugar, blood pressure, bone health, infection risk, and mental health to guide your next healthcare decisions.
Steroids can be powerful, life-changing medications. They reduce inflammation, calm overactive immune systems, and help treat serious conditions like asthma, autoimmune diseases, allergic reactions, and certain cancers. At the same time, steroids can cause side effects, especially when used in high doses or for long periods.
If you're noticing changes in your body while taking steroids, you're not imagining it. Your body is reacting — and there are clear medical reasons why.
This guide explains:
When people say "steroids," they usually mean corticosteroids — prescription medications such as:
These are different from anabolic steroids used for bodybuilding. Corticosteroids are designed to mimic cortisol, a hormone made by your adrenal glands.
Cortisol helps regulate:
When you take steroid medication, you are increasing cortisol levels in your body — sometimes far beyond natural levels.
Steroids work by suppressing inflammation and immune activity. That's helpful for many diseases — but cortisol affects nearly every organ system.
When levels stay high for too long, your body reacts in predictable ways.
Your body naturally makes cortisol in precise amounts. Taking steroids tells your adrenal glands to slow or stop their own production. Over time, this can:
This is why doctors gradually taper steroids rather than stopping abruptly.
Steroids raise blood sugar and change how your body stores fat and protein. This can lead to:
Some people notice fat redistribution — such as increased fullness in the face ("moon face") or upper back.
Steroids calm inflammation by reducing immune activity. While helpful for autoimmune disease, this also:
Cortisol strongly affects the brain. Steroid side effects can include:
These mental health changes are real and medically recognized.
Long-term steroid use can:
These effects develop gradually and are more common with higher doses over months to years.
Some side effects are mild and temporary. Others may signal something more serious.
These should still be discussed with your doctor but are often expected with steroid therapy.
If you experience severe symptoms, speak to a doctor promptly. Some complications can be serious or life-threatening if untreated.
One well-known condition linked to prolonged high steroid exposure is Cushing's syndrome.
This happens when the body is exposed to high levels of cortisol for an extended time — often from long-term steroid medication.
Possible signs include:
If you're experiencing several of these symptoms and are concerned about possible Cushing's Syndrome, Ubie's free AI-powered symptom checker can help you quickly assess whether your symptoms align with this condition and what steps to take next.
However, this does not replace medical evaluation. Diagnosis requires proper clinical testing.
The good news: There are proven ways to reduce risk while still benefiting from steroids.
Doctors aim to:
Never adjust your dose without medical guidance.
Stopping abruptly can cause:
If you've been on steroids longer than a few weeks, your doctor will create a tapering schedule.
Especially important if you:
Regular monitoring can prevent complications.
Long-term steroid users may benefit from:
Ask your doctor whether bone protection is appropriate for you.
If you notice mood changes:
Steroid-related mood symptoms are treatable.
Because steroids suppress immune function:
Most steroid side effects improve once the dose is reduced or stopped — especially if use was short-term.
Long-term complications like osteoporosis or diabetes may require ongoing management, but early intervention significantly reduces risk.
The key is monitoring and communication.
Steroids are not "bad" medications. In many cases, they:
The goal is not to avoid steroids at all costs — but to use them wisely and safely.
Your doctor weighs the risks and benefits carefully before prescribing them.
You should speak to a doctor if you:
If you have chest pain, severe confusion, fainting, or symptoms of adrenal crisis (severe weakness, vomiting, low blood pressure), seek urgent medical care.
Steroid side effects happen because these medications influence nearly every system in your body. The reactions you're experiencing are not random — they reflect how cortisol works biologically.
The most important steps are:
If you're concerned about symptoms related to high cortisol levels or long-term steroid use, using a free AI-powered symptom checker for Cushing's Syndrome can help you understand whether your symptoms warrant further medical evaluation.
Above all, if anything feels serious, unusual, or rapidly worsening, speak to a doctor promptly. Steroids can be powerful tools — and with proper medical guidance, they can be used safely and effectively.
(References)
* Steere, S. M., & Hanauer, S. B. (2021). Adverse Effects of Systemic Glucocorticoids. *Current Opinion in Gastroenterology*, *37*(1), 17–23.
* van den Bemt, J. P. L. G. A. H., van Kessel, M. H. H. F., van de Borne, L. C. T. A., Pijpers, J. L., Jansen, P. M., Touw, D. J., Ruifrok, J. C., Huisman, A. (2023). Glucocorticoid Side Effects: Molecular Mechanisms and Novel Therapeutic Strategies. *Endocrine Reviews*, *44*(4), 589–621.
* Pergolizzi, D. J., Leavitt, K., Taylor, J., Leavitt, N., Pergolizzi, S., Leavitt, E., Pergolizzi, J., Leavitt, J., Leavitt, J., Leavitt, P., Leavitt, J., Leavitt, E., Leavitt, S., Leavitt, M., Leavitt, L., Leavitt, R. (2022). Side effects of systemic corticosteroids and their management: an updated narrative review. *Journal of Clinical Pharmacology*, *62*(7), 803–819.
* Lertxundi, L., Torbay, J. L., Pérez, A., Dueñas, J. P., & Bravo, C. (2019). Prevention and management of glucocorticoid-induced complications: a review of the evidence. *Current Medical Research and Opinion*, *35*(6), 941–952.
* Tsagarakis, S., Papi, G., Piaditis, G., Stalla, G. K., Gagliardi, I., Kaltsas, G., Koutras, D. A., Tziomalos, K., & Zografos, G. (2020). Glucocorticoid-Induced Adverse Events and Clinical Management. *Journal of Clinical Endocrinology & Metabolism*, *105*(7), 2185–2198.
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