Signs Your Myasthenia Gravis Treatment Regimen May Need a Change

Myasthenia gravis (MG) is a chronic autoimmune condition that disrupts communication between nerves and muscles, leading to weakness that can fluctuate throughout the day.

Symptoms often worsen with activity and improve with rest — a pattern known as fatigable weakness — which can make it difficult to tell whether the disease is stable or subtly getting worse.

On top of that, many people with MG slowly adjust to symptoms that aren’t well managed by their medications by avoiding certain tasks or modifying their routines — which can also make it harder to recognize when symptoms are getting worse.

The upshot: It’s not always obvious when your treatment is no longer working as well as it should.

“Myasthenia gravis is considered stable when symptoms are so mild they don’t affect daily life, even though the neurologist may still detect signs of fatigability during an exam,” says Ricardo H. Roda, MD, PhD, the director of the Johns Hopkins Myasthenia Gravis Center in Baltimore.

It’s known as “minimal manifestation status,” and it’s the goal of treatment in MG, he says.

In practice, minimal manifestation status means a person may have subtle signs of weakness, such as slight drooping of the eyelid, but without symptoms that affect vision or function in everyday life, says Xinli Du, MD, a neurologist at VCU Health in Richmond, Virginia.

Because weakness and muscle fatigue in MG are highly fluctuating and worsen with use, stability isn’t about whether symptoms come and go; it’s about whether they are controlled enough that they don’t limit what you can do, says Dr. Roda.

One challenge is that people with MG sometimes limit themselves without even realizing it — by changing how they do things or avoiding certain activities altogether, called “adaptation.”

“‘Adaptation’ in this context refers to situations where individuals may not recognize the full extent of their illness, often because they unconsciously adjust their behavior to cope. As a result, they might not perceive themselves as being as unwell as they actually are,” says Roda.

When MG is not adequately controlled, symptoms may become more frequent, more severe, or begin to interfere with everyday activities.

Some of the most common signs involve muscle groups that are particularly sensitive to fatigue:

• Ocular symptoms are often one of the earliest or most noticeable changes. This can include drooping eyelids (ptosis) or double vision (diplopia), which may worsen later in the day or after prolonged use of the eyes.
• Bulbar symptoms — those affecting the muscles used for chewing, swallowing, and speaking — may also become more pronounced. You might notice that chewing becomes tiring, swallowing takes more effort, or your speech sounds slurred or nasal after talking for a period of time.
• “Anti-gravity” movements — such as brushing your hair, lifting your arms, or rising from a chair — can also become more difficult as weakness increases.

“Many patients do not attribute these adaptations to treatment failure [and instead try] to ‘accommodate’ or adapt,” says Dr. Du.

Even when you don’t consciously register that your symptoms are getting worse, changes in your daily life may signal that MG is affecting you more than you realize.

These changes can show up in subtle but meaningful ways over time, says Roda.

One common sign is social withdrawal. “People with myasthenia gravis who are adapting may experience a noticeable decline in their usual activity levels, often choosing to stay home more frequently and avoiding social or physical engagements,” says Roda.

Adaptation may look like abandoning routines or hobbies that you once enjoyed, he says. “That not only affects daily activities but also mood and sleep,” he adds.

Mood changes are another important piece. Living with a fluctuating chronic condition can increase the risk of anxiety or depression, which in turn can worsen the experience of generalized fatigue, called central fatigue, says Roda.

Research and clinical experience suggest that depression and anxiety are strongly associated with fatigue in MG, and addressing these factors can be an important part of improving overall quality of life, Roda says.

If you’ve noticed changes in your symptoms, function, or daily routine, it may be time to talk with your neurologist, especially if those changes are affecting your ability to stay engaged in daily life, says Roda.

Doctors often use tools like the Myasthenia Gravis Activities of Daily Living (MG-ADL) scale to track how MG is affecting you over time. The scale looks at eight key areas — including vision, speech, swallowing, breathing, and limb strength — to help quantify symptom burden.

“It helps to track response to treatment and understand what’s happening to a particular patient,” says Srikanth Muppidi, MD, a neuromuscular neurologist and researcher at Stanford Medicine in California.

Changes in this score can help guide treatment decisions, but they are only part of the picture. What matters most is how symptoms are affecting your daily life, says Dr. Muppidi.

Paying attention to patterns can also be helpful, says Du. “These details can help identify triggers, guide medication timing, or determine whether treatment needs to be adjusted,” she says.

Tracking patterns can also help identify when symptoms may be related to something other than MG. For example, fatigue that’s constant rather than activity-related, may be a sign of thyroid disease, anemia, vitamin deficiencies, or sleep apnea, says Du.

During a neurology visit, you will likely be asked about:

• Changes in symptoms and when they began
• Specific activities that have become more difficult
• Adjustments you’ve made in response to symptoms
• Potential triggers, such as heat or illness
• How symptoms relate to medication timing
• Any new medications or health conditions

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Together, you and your doctor can decide whether your current regimen is providing adequate control or whether changes to your treatment plan may improve symptoms and function.

• Myasthenia gravis is considered well controlled when symptoms don’t interfere with daily life.
• If symptoms are becoming more noticeable or limiting what you can do, it may be a sign your treatment needs to be adjusted.
• Subtle changes in your behavior, such as avoiding activities or adjusting your routine, can mean your symptoms are getting worse — even if you don’t recognize it right away.
• Pay attention to changes in how you feel and function — and discuss them with your doctor — to keep your treatment on track.