15+ Prednisone Side Effects You Shouldn’t Ignore (and some you can!)
Prednisone is a powerful steroid medication used to treat a wide range of inflammatory and autoimmune conditions. While it can be life-saving, it also comes with a long list of side effects—some more serious than others.
Understanding these potential side effects is essential so you can work with your healthcare provider to manage them and reduce long-term risks. Below are 15+ specific side effects categorized for easier understanding—plus helpful tips for recognizing and addressing them.
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1. Moon Face (Facial Swelling)
“Moon face” is the nickname for prednisone-induced swelling and fat accumulation in the cheeks and face. It gives the face a round, puffy appearance and is one of the most recognizable signs of steroid use. While it may seem like a cosmetic issue, it’s actually a visible sign of deeper hormonal and metabolic changes caused by prednisone.
What you can do: Lowering your dose over time (with medical guidance) can help reduce this swelling. Eating a low-sodium, anti-inflammatory diet may also help manage fluid retention.
2. Weight Gain and Fat Redistribution
Prednisone can cause rapid weight gain, particularly in the abdomen, back of the neck (“buffalo hump”), and face, while limbs may appear thinner. This is due to changes in how the body stores and processes fat and fluid.
Why it happens: Prednisone mimics cortisol, which alters metabolism, stimulates appetite, and redistributes fat storage.
What you can do: Maintain a healthy diet, monitor portion sizes, and stay active to help counter these effects. A dietitian may be helpful if you’re gaining weight quickly.
3. Blood Sugar Spikes / Prednisone-Induced Diabetes
Even a short course of prednisone can cause high blood sugar (hyperglycemia). For some, this leads to a temporary diabetic state, especially in people who are already at risk. In long-term users, it may develop into steroid-induced diabetes.
Watch for: Increased thirst, frequent urination, fatigue, or blurred vision.
What you can do: Monitor blood sugar regularly, reduce refined carbs, and ask your provider whether medications like metformin are appropriate.
4. High Blood Pressure (Hypertension)
Prednisone causes the body to retain sodium and excrete potassium, which can lead to increased fluid volume and elevated blood pressure. This may develop over time, even if you previously had normal readings.
What you can do: Check your blood pressure regularly at home or at a pharmacy. Limit salt intake and ask your doctor about medications or lifestyle changes to control hypertension.
5. Cholesterol Imbalance
Corticosteroids can affect lipid metabolism, leading to increased LDL (“bad” cholesterol) and decreased HDL (“good” cholesterol). Over time, this raises the risk of atherosclerosis, heart disease, and stroke.
What you can do: Get regular lipid panel blood tests. Focus on heart-healthy fats (like omega-3s), fiber, and exercise. Medications like statins may be necessary in some cases.
6. Insomnia and Sleep Disruption
Prednisone acts like cortisol, the “alert” hormone. Taking it too late in the day can lead to racing thoughts, restlessness, and poor sleep. Insomnia can worsen fatigue and mood issues over time.
What you can do: Take prednisone early in the morning. Use sleep hygiene strategies like avoiding screens at night and practicing relaxation techniques. Melatonin or magnesium may help with sleep onset, but talk to your provider first.
7. Mood Changes: Anxiety, Depression, Irritability
Mood swings are a common prednisone side effect. Some patients experience anxiety, depression, or feel uncharacteristically angry or irritable. Emotional sensitivity and overreactions can make daily life more difficult.
Why it happens: Prednisone impacts brain chemistry, including neurotransmitters like serotonin and dopamine.
What you can do: Track mood changes. Talk to your provider if symptoms persist—they may recommend adjusting the dose, changing medications, or adding short-term support like therapy or antidepressants.
8. Steroid-Induced Psychosis
In rare cases, especially at high doses, prednisone can cause psychosis, including hallucinations, paranoia, or delusional thinking. This is a medical emergency that requires immediate attention.
Warning signs: Hearing or seeing things that aren’t there, confusion, extreme agitation, or believing things that are clearly untrue.
What you can do: Seek emergency care immediately. Never stop prednisone abruptly without supervision.
9. Increased Risk of Infections
Prednisone suppresses the immune system, leaving the body more vulnerable to infections like pneumonia, sepsis, shingles, and fungal infections. Even mild illnesses can become serious.
What’s tricky: You may not have typical signs like fever due to suppressed inflammation. That means infections may go unnoticed until they are more severe.
What you can do: Practice good hygiene, avoid sick people, and stay up to date on vaccines (as appropriate). Contact your doctor right away if you feel “off” or develop unexplained symptoms.
10. Blurry Vision
Short-term prednisone use can cause temporary blurry vision, usually due to fluid retention and increased intraocular pressure. This is typically reversible with lower doses.
What you can do: If blurry vision persists, get a full eye exam. It could be the first sign of more serious eye conditions linked to steroids.
11. Cataracts
Long-term use increases your risk of posterior subcapsular cataracts, which cloud the lens of the eye and affect vision. These types of cataracts can develop faster than age-related ones.
What you can do: Schedule regular eye exams to catch changes early. Cataracts are treatable with surgery if needed.
12. Glaucoma
Prednisone can raise intraocular pressure, which may damage the optic nerve and lead to glaucoma—a potentially permanent cause of vision loss.
Warning signs: Tunnel vision, halos around lights, headaches, or eye pain.
What you can do: See an ophthalmologist regularly if you’re on long-term steroids or have eye symptoms.
13. Tooth Sensitivity and Jaw Pain
Some people on prednisone report toothaches or jaw pain, possibly due to changes in bone mineral density or increased sensitivity. These symptoms can appear suddenly and worsen with temperature changes.
What you can do: Use sensitivity toothpaste and avoid extreme hot/cold foods. Visit a dentist if the pain persists or worsens.
14. Osteoporosis
Prednisone reduces calcium absorption, increases calcium loss through urine, and decreases bone formation—leading to osteoporosis over time.
Symptoms: Back pain, loss of height, frequent fractures, or spinal compression.
What you can do: Take calcium and vitamin D, engage in weight-bearing exercise, and ask your doctor about bone density tests and medications like bisphosphonates if you’re at high risk.
15. Osteonecrosis (Bone Death)
A more serious complication than osteoporosis, osteonecrosis happens when blood supply to bone tissue is cut off, usually in the hips. This causes the bone to die, leading to pain and limited mobility.
Watch for: Persistent hip pain, difficulty walking, or stiffness that worsens over time.
What you can do: Early imaging (like MRI) can help detect it. Treatment may include surgery or joint replacement in advanced cases.
16. Elevated White Blood Cell Count
Prednisone can cause a false elevation in white blood cells (WBCs), particularly neutrophils. It’s not an infection, but rather a redistribution of cells into the bloodstream.
Why it matters: This can confuse lab results, so your doctor must interpret WBC counts in context.
What you can do: Just be aware and make sure your doctor knows you’re taking prednisone when reviewing blood tests.
17. Adrenal Suppression and Tapering Issues
Long-term steroid use suppresses your adrenal glands, which normally make cortisol. Suddenly stopping prednisone can trigger adrenal insufficiency, a potentially dangerous condition.
Symptoms: Fatigue, nausea, body aches, low blood pressure, dizziness.
What you can do: Never stop prednisone abruptly. Work with your doctor on a slow tapering plan to allow your body time to restart natural hormone production.
18. Cardiovascular Risks
Steroid use is associated with an increased risk of heart disease, stroke, blood clots, and atherosclerosis. These risks are higher in people with other conditions like diabetes or high blood pressure.
Symptoms to watch: Chest pain, shortness of breath, sudden numbness, or difficulty speaking.
What you can do: Manage your blood pressure, cholesterol, blood sugar, and weight. Adopt heart-healthy habits and check in with your doctor regularly.
Final Thoughts
Prednisone is a powerful drug—both in its ability to control inflammation and in its potential to cause harm. The best outcomes happen when patients are educated, proactive, and closely monitored.
Don’t ignore side effects. With the right knowledge and support, you can reduce the risks and continue benefiting from this essential medication.
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