Progressive supranuclear palsy is a rare brain disorder that gradually damages areas controlling movement, balance, vision, and thinking. While there is no cure yet, a combination of treatments can help manage symptoms and maintain quality of life, and researchers are actively testing new therapies in clinical trials.

How Treatment Helps People with Progressive Supranuclear Palsy

When someone receives a diagnosis of progressive supranuclear palsy, often shortened to PSP, understanding the treatment options becomes one of the most important steps forward. The main goal of treatment is not to cure the disease, which currently cannot be stopped, but to help control symptoms, slow down their worsening where possible, and support the person in maintaining independence and comfort for as long as possible.^[1]

Treatment for PSP is highly individual because the disease affects people differently. Some may struggle more with balance and falls, while others face early difficulties with eye movements or swallowing. The stage of the disease also matters greatly—what works in the early months may need adjustment as symptoms progress. For this reason, doctors design treatment plans that match each person’s specific needs and symptoms at any given time.^[5]

Medical professionals have learned that PSP requires a team approach. Because the condition touches so many parts of daily life—walking, eating, speaking, seeing, thinking—no single specialist can address all the challenges. Instead, people with PSP typically work with a group of healthcare providers who specialize in different areas, including neurologists who understand brain diseases, physiotherapists who help with movement, speech therapists who address swallowing and communication, and occupational therapists who suggest practical changes at home to prevent falls and injuries.^[9]

There are two main paths of treatment available today. The first includes standard therapies that have been used for years and are approved by medical organizations. These involve medications, rehabilitation exercises, and supportive care. The second path involves experimental treatments being studied in clinical trials—research studies where new drugs or approaches are tested to see if they might work better than what is currently available. Both paths are important, and some people with PSP may participate in clinical trials while also receiving standard care.^[8]

Standard Medical Treatment for PSP

Currently, there is no medication specifically designed to treat progressive supranuclear palsy. However, doctors have found that some drugs used for Parkinson’s disease, a more common movement disorder, may provide modest relief for certain PSP symptoms, at least for a limited time. The most commonly tried medication is a combination of carbidopa and levodopa, often known by the brand name Sinemet. Levodopa works by increasing levels of dopamine, a chemical messenger in the brain that helps control smooth and coordinated muscle movements.^[8]

The response to carbidopa-levodopa in PSP is very different from the response in Parkinson’s disease. While people with Parkinson’s often experience dramatic improvement, most people with PSP see little to no benefit. When improvement does occur, it is usually mild and short-lived, lasting only about two to three years in most cases. Some doctors view this limited response as a helpful clue during diagnosis—if someone with suspected Parkinson’s disease does not respond well to levodopa, PSP becomes a more likely explanation.^[8][15]

Another medication sometimes prescribed is amantadine, which may help with muscle stiffness and slow movement. Like levodopa, its effects are modest. Some clinicians believe that bromocriptine, a dopamine agonist, might have slightly better results in PSP than levodopa, though evidence remains limited and the benefits are still temporary for most patients.^[15]

For people experiencing muscle rigidity or painful muscle spasms, muscle relaxants can sometimes provide relief. When stiffness becomes severe, these medications help the muscles relax, making movement a bit easier and reducing discomfort.^[15]

Botulinum toxin, commonly known as Botox, has proven useful for several specific problems in PSP. When injected in small amounts into the muscles around the eyes, Botox can help control involuntary eyelid spasms and excessive blinking or difficulty opening the eyes. It works by blocking the chemical signals that tell muscles to contract. The effects typically last about three months before another injection is needed. Botox can also be used to treat excessive drooling and certain types of muscle tightness in the neck or limbs.^[8][9]

Depression, apathy, and mood changes are common in PSP and can significantly affect quality of life. Antidepressants are often prescribed to help with these emotional symptoms. Some antidepressants, particularly tricyclic antidepressants, have been tried with limited success in PSP. These medications may also help with other issues such as pain, sleep disturbances, and bladder or bowel problems that sometimes accompany the disease.^[9][15]

Eye problems in PSP can cause significant discomfort and difficulty. Because people with PSP blink less frequently, they often develop chronic eye irritation and excessive tearing. Simple treatments like artificial tears or moisturizing eye drops can provide relief. Some people benefit from wearing sunglasses, even indoors, because PSP often causes increased sensitivity to light.^[4]

Rehabilitation and Supportive Therapies

Physiotherapy, or physical therapy, plays a central role in managing PSP. A physiotherapist works with the person to maintain mobility, strengthen muscles, improve posture, and prevent joints from becoming stiff. Regular, carefully planned exercise can help preserve physical function longer. Importantly, physiotherapists teach breathing exercises that can be used during meals to reduce the risk of aspiration pneumonia, a serious chest infection that occurs when food or liquid accidentally enters the lungs instead of the stomach.^[9]

Falls are one of the most dangerous aspects of PSP, often occurring early in the disease and typically backward. Physiotherapists assess balance and gait, then recommend appropriate assistive devices such as walking frames or specially designed shoes with better grip to reduce the risk of slipping. They also create individualized exercise programs to help strengthen the muscles needed for stability.^[9]

Occupational therapy focuses on helping people with PSP remain as independent as possible in their daily activities. An occupational therapist visits the home to identify fall hazards such as loose rugs, poor lighting, crowded hallways, or slippery bathroom floors. They recommend practical modifications like installing grab bars beside the toilet and in the shower, improving lighting in stairways, and removing obstacles that might cause trips. These simple changes can significantly reduce the risk of injuries from falls.^[9]

Speech and language therapy addresses two critical problems in PSP: difficulty speaking and difficulty swallowing. A speech therapist teaches techniques to make speech clearer and louder, helping the person communicate more effectively as the disease progresses. They may also introduce communication aids or devices when verbal communication becomes too challenging.^[9]

Swallowing difficulties, known as dysphagia, require careful management because they can lead to choking or aspiration pneumonia. Speech therapists conduct formal swallowing evaluations, ideally every six months or more frequently if problems worsen. They teach specific swallowing techniques and suggest changes to the texture and consistency of food to make swallowing safer. For example, they might recommend thickened liquids or softer foods that are easier to swallow without choking.^[9]

When swallowing becomes severely impaired and eating by mouth poses too great a risk, a feeding tube may be recommended. The most common type is called a percutaneous endoscopic gastrostomy, or PEG tube, which is placed directly into the stomach through the abdominal wall during a surgical procedure. This ensures adequate nutrition and hydration while avoiding the dangers of aspiration. The decision to use a feeding tube is deeply personal and should be discussed thoroughly with the medical team and family, ideally before swallowing problems become severe.^[9][19]

Nutritionists or dietitians work alongside speech therapists to ensure that dietary modifications still provide balanced nutrition. They suggest foods that meet nutritional needs while being safe to swallow, such as mashed potatoes for carbohydrates and scrambled eggs for protein.^[9]

Innovative Treatments in Clinical Trials

Because current medications offer only limited symptom relief and do not slow the progression of PSP, researchers are urgently searching for better treatments. Clinical trials are research studies where new drugs or therapies are tested in volunteers to determine if they are safe and effective. Participating in a clinical trial gives people with PSP access to cutting-edge treatments that are not yet available to the general public, while also contributing to scientific knowledge that may help future patients.^[12]

One of the most significant recent developments in PSP research is a large-scale clinical trial funded by the National Institute on Aging in the United States. This study, led by the University of California San Francisco, received a grant of up to $75.4 million over five years, making it one of the largest grants ever awarded for PSP research. The trial will test three different drugs simultaneously at up to 50 sites across the United States. If the initial three drugs do not prove effective, the researchers plan to continue testing additional promising therapies. The goal is to find treatments that can slow disease progression by even 20 to 30 percent, which would represent a meaningful improvement for people living with this relentless condition.^[12]

Scientists believe that PSP is caused by abnormal accumulation of a protein called tau in the brain. Tau is normally important for brain health, helping to maintain the structure of nerve cells. In PSP, however, tau does not break down properly and instead forms harmful clumps inside brain cells, leading to cell damage and death. This understanding has guided researchers toward developing therapies that target tau directly.^[2][4]

Several experimental approaches are being explored in clinical trials. Some drugs aim to prevent tau from clumping together or to help the body clear away abnormal tau proteins. Other therapies focus on protecting brain cells from the damage caused by tau accumulation or on reducing inflammation in the brain that may contribute to cell death.^[12]

Clinical trials typically occur in phases. Phase I trials test whether a new drug is safe and determine the appropriate dose. These studies usually involve small numbers of participants. Phase II trials examine whether the drug actually works—whether it improves symptoms or slows disease progression—while continuing to monitor safety. These studies involve more participants. Phase III trials compare the new treatment directly against the current standard of care in large groups of patients to confirm effectiveness and watch for rare side effects. Only after successfully completing all three phases can a drug be approved for general use.^[12]

One earlier trial tested coenzyme Q10, a naturally occurring substance in the body that helps cells produce energy. This Phase II study found modest improvements in certain measures of motor function and thinking ability over six weeks, along with favorable changes in brain energy metabolism. While the effects were limited, the trial demonstrated that it is possible to measure meaningful changes in PSP patients over relatively short periods, which helps researchers design better studies.^[15]

Another drug that was tested in clinical trials is called davunetide. Although this particular trial did not show the hoped-for benefits, the experience taught researchers valuable lessons about how to measure treatment effects in PSP and which outcomes matter most to patients.^[19]

Eligibility for clinical trials varies depending on the specific study. Most trials require participants to have a confirmed diagnosis of PSP and to be at a certain stage of disease progression. Some trials may exclude people taking certain medications or those with other serious health conditions. Trials are typically conducted at specialized medical centers, often at universities or research hospitals. In the United States, active trials are taking place at numerous sites across the country to make participation more accessible.^[12]

Participating in a clinical trial involves regular monitoring and testing. Participants typically receive careful medical supervision and frequent assessments of their symptoms. While there is no guarantee that an experimental treatment will help, and there may be unknown side effects, many people with PSP and their families find meaning in contributing to research that could lead to better treatments in the future.^[12]

Most common treatment methods

• Medication therapy
  • Carbidopa-levodopa (Sinemet) may provide modest, temporary relief of muscle stiffness and slow movement in some patients, though response is limited compared to Parkinson’s disease
  • Amantadine can help with muscle stiffness and rigidity
  • Bromocriptine, a dopamine agonist, may offer slightly better results than levodopa in some cases
  • Muscle relaxants help reduce severe stiffness and painful spasms
  • Botulinum toxin (Botox) injections treat eyelid spasms, neck rigidity, and excessive drooling by blocking signals to affected muscles
  • Antidepressants address depression, apathy, and mood changes, and may help with sleep, pain, and bladder problems
  • Artificial tears and moisturizing eye drops relieve chronic eye irritation caused by reduced blinking
• Physical rehabilitation
  • Physiotherapy maintains mobility, strengthens muscles, improves posture, and prevents joint stiffening through regular exercise
  • Balance and gait training reduces fall risk, with recommendations for assistive devices like walkers or specialized shoes
  • Breathing exercises during meals help prevent aspiration pneumonia
  • Occupational therapy identifies home hazards and recommends safety modifications such as grab bars, improved lighting, and removal of tripping hazards
• Speech and swallowing support
  • Speech therapy teaches techniques to maintain clear communication and introduces communication aids as needed
  • Formal swallowing evaluations every six months or more frequently assess safety of eating and drinking
  • Modified diet textures and thickened liquids make swallowing safer and reduce choking risk
  • Feeding tubes (PEG tubes) provide nutrition and hydration when swallowing becomes too dangerous
  • Dietary counseling ensures balanced nutrition despite texture modifications
• Experimental therapies in clinical trials
  • Tau-targeting drugs aim to prevent tau protein clumping or help clear abnormal tau from the brain
  • Neuroprotective agents work to shield brain cells from damage caused by tau accumulation
  • Anti-inflammatory therapies reduce brain inflammation that may contribute to cell death
  • Coenzyme Q10 showed modest improvements in motor function and brain energy metabolism in early trials
  • Multi-center trials testing multiple drugs simultaneously to accelerate discovery of effective treatments