Managing steroid side effects with myasthenia gravis

Steroids are an effective treatment for myasthenia gravis (MG) symptoms, but they can also cause side effects that affect daily life.

Anticipating and managing steroid side effects can make it easier to continue your treatment plan and experience the benefits of steroids for MG.

Benefits of steroids for MG

Because MG can worsen without treatment, early therapy is important. Corticosteroids, commonly called steroids, are one of the primary medications used to control MG symptoms and reduce disease activity.

They are relatively affordable, easy to take, and typically act fast. Steroid treatment can also improve long-term outcomes in MG.

Common side effects of steroids for MG

While steroids can be highly effective, they can also cause side effects that range from mild to serious. Common issues reported with MG steroid use include:

• weight gain
• insomnia, including trouble falling or staying asleep
• mood changes, such as anxiety, agitation, or irritability
• high blood sugar, often leading to steroid-induced diabetes
• high blood pressure
• electrolyte imbalances, including low potassium or high sodium
• stomach irritation or ulcers

Not everyone experiences the same side effects. Risk varies based on dosage, duration of treatment, and individual health factors. Some long-term steroid side effects can be more serious or irreversible, such as:

• steroid-induced osteoporosis, which increases the risk of bone fractures
• eye conditions such as glaucoma or cataracts
• increased infection risk
• conditions affecting the heart and blood vessels
• changes in appearance known as Cushing’s syndrome, such as facial puffiness, acne, thinning skin, and increased fat buildup in the back of the neck and torso

The good news is that many steroid side effects can be managed with a combination of healthy habits, monitoring, medications, and support from your care team.

Managing steroid side effects

For people living with MG, managing steroid side effects is a key part of long-term care. Higher doses, longer use, and nighttime dosing increase the risk of steroid side effects, though some may occur unpredictably, even with short-term treatment.

Working with your care team to anticipate and monitor risks — such as infections, bone loss, blood sugar changes, blood pressure shifts, mood changes, and sleep problems — can help you stay ahead of potential issues.

Blood sugar changes

Steroids can raise blood sugar levels, sometimes leading to steroid-induced diabetes. Practical steps that may help include:

• eating balanced meals
• limiting excess calories
• monitoring your blood sugar
• staying physically active at a level that feels safe and sustainable

Your healthcare provider may also recommend adding treatments to control blood sugar, such as insulin or other medications.

High blood pressure

Steroids can raise blood pressure by altering fluid balance and electrolyte levels. Steps such as reducing sodium intake, staying physically active, and avoiding smoking may help lower risk.

Checking your blood pressure regularly can make it easier to catch changes early. If needed, your healthcare provider may prescribe blood pressure medications.

Bone health

Bone health is another important focus when taking steroids for MG. Steroid-induced osteoporosis can begin early, even at lower doses, which is why bone-protective strategies are often started alongside steroid therapy. Strategies may include:

• engaging in regular weight-bearing activity (under a carefully designed exercise program)
• ensuring adequate calcium and vitamin D intake (but check with your care team before starting supplements)
• taking any prescribed medications to help preserve bone density when appropriate

Mental health and sleep

Taking steroids for MG can affect mood and sleep, sometimes causing irritability, anxiety, depression, or trouble falling or staying asleep.

Taking steroids earlier in the day may help reduce sleep disruption. Other helpful strategies include keeping a consistent sleep schedule, limiting caffeine later in the day, and following calming bedtime routines.

Letting family members know that mood changes may be treatment-related can also help reduce relationship strain and misunderstandings.

If mood changes or sleep problems begin to interfere with daily life, your healthcare provider may recommend talk therapy, medications, or other supportive strategies.

Weight and appearance changes

Steroids can lead to weight gain and facial puffiness, especially with higher doses or long-term use. These changes often happen because steroids increase appetite, cause fluid buildup, and affect how the body stores fat.

Strategies that may help:

• Cut back on salt to help limit swelling from fluid retention.
• Plan meals around lean protein and whole foods to help manage increased hunger.
• Stay active when possible, even with gentle activities like walking or light strength training.

Practice simple skin care to help tame common skin side effects of steroids, such as acne. Cleanse gently twice a day, use a non-irritating moisturizer and sunscreen, and consider over-the-counter acne treatments if needed.

Changes in weight or appearance can affect confidence and emotional well-being. If these changes feel difficult to cope with, talk with your care team about support options, including counseling or MG support groups.

Increased infection risk

Because steroids suppress the immune system, infections may be more likely. Simple steps such as frequent hand-washing, avoiding close contact with people who are sick, and staying up to date with recommended vaccinations (as advised by your healthcare provider) may help reduce risk.

Be sure to tell your care team if you notice signs of infection, such as fever, persistent cough, or unusual fatigue.

Screening for infections before starting steroids and sharing any history of infections with your care team can further reduce complications.

Reducing the risk of steroid side effects

Using the lowest effective dose for the shortest necessary time is one of the most important ways to reduce steroid-related risks. Many MG care plans aim to begin a steroid taper once symptoms improve, often within four months, though timing depends on individual response.

Note that you should not change your dose on your own, because lowering or stopping steroids too quickly can raise the risk of symptom flare-ups and other side effects.

Aside from tapering, reducing steroid side effect risk involves proactive monitoring, including blood tests, weight checks, blood pressure measurements, and eye exams. Simple daily habits, such as taking steroids with food and staying as physically active as possible, can also help.

Speaking with your doctor

Steroids can play a powerful role in controlling MG, but they work best when paired with careful monitoring and open communication with your healthcare provider.

If you notice bothersome side effects, you don’t have to manage them all on your own. Together, you and your provider can focus on managing steroid side effects while still controlling symptoms to balance effectiveness, safety, and quality of life.