Dopaminergic Medications And Their Side Effects
The most commonly prescribed drugs used to treat Parkinsons disease are dopaminergic medications. These drugs work by influencing levels of the neurotransmitter dopamine. These drugs often work because Parkinsons disease symptoms are caused by low levels of dopamine in the brain.
Dopaminergic medications include:
Causes Of Parkinson Disease
In Parkinson disease, synuclein forms clumps called Lewy bodies in nerve cells. Lewy bodies consist of misfolded synuclein. Synuclein can accumulate in several regions of the brain, particularly in the substantia nigra and interfere with brain function. Lewy bodies often accumulate in other parts of the brain and nervous system, suggesting that they may be involved in other disorders. In Lewy body dementia Dementia With Lewy Bodies and Parkinson Disease Dementia Dementia with Lewy bodies is progressive loss of mental function characterized by the development of Lewy bodies in nerve cells. Parkinson disease dementia is loss of mental function characterized… read more , Lewy bodies form throughout the outer layer of the brain . Lewy bodies may also be involved in Alzheimer disease Alzheimer Disease Alzheimer disease is a progressive loss of mental function, characterized by degeneration of brain tissue, including loss of nerve cells, the accumulation of an abnormal protein called beta-amyloid… read more , possibly explaining why about one third of people with Parkinson disease have symptoms of Alzheimer disease and why some people with Alzheimer disease develop parkinsonian symptoms.
About 10% of people with Parkinson disease have relatives who have or have had the disease. Also, several gene mutations that can cause Parkinson disease have been identified.
Medications To Avoid Or Use With Caution
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Before making any decisions about treatment of Parkinsons disease, you will want to learn about the different types of medications available for Parkinsons disease and discuss the pros and cons of each with your physician. It may help to know that there is no right answer, and if you try something that doesnt work for you, you can always adjust your plan.
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Drugs To Treat Parkinsons Disease
Study conducted by medical researchers have compared two drugs named Levodopa and Pramipexole, which is employed generally as the first treatment line associated with the parkinsons disease problem. These drugs use various mechanisms to counteract with declining in the dopamine production in human brain, which is a result of progressive cell loss to secrete neuro chemicals in human brain. Levodopa is a type of amino acid, which human body metabolizes to form dopamine. On the other side, Pramipexole is a type of dopamine agonist, which binds with dopamine receptors present on cells in human brain and mimics the molecular function associated with the chemical.
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Parkinsons And Urinary Problems
Just as your digestive tract may become weaker, so can the muscles of your urinary tract system.
Parkinsons disease and medications prescribed for treatment can cause your autonomic nervous system to stop functioning properly. When that happens, you may begin experiencing urinary incontinence or difficulty urinating.
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How Is Parkinson’s Disease Managed
Your doctors will tailor your treatment based on your individual circumstances. You will manage your condition best if you have the support of a team, which may include a general practitioner, neurologist, physiotherapist, occupational therapist, psychologist, specialist nurse and dietitian.
While there is no cure for Parkinson’s disease, symptoms can be treated with a combination of the following.
What Causes The Condition
Although there are several recognized risk factors for Parkinsons disease, such as exposure to pesticides, for now, the only confirmed causes of Parkinsons disease are genetic. When Parkinsons disease isnt genetic, experts classify it as idiopathic . That means they dont know exactly why it happens.
Many conditions look like Parkinson’s disease but are instead parkinsonism from a specific cause like some psychiatric medications.
Familial Parkinsons disease
Parkinsons disease can have a familial cause, which means you can inherit it from one or both of your parents. However, this only makes up about 10% of all cases.
Experts have linked at least seven different genes to Parkinson’s disease. They’ve linked three of those to early-onset of the condition . Some genetic mutations also cause unique, distinguishing features.
Idiopathic Parkinsons disease
Experts believe idiopathic Parkinsons disease happens because of problems with how your body uses a protein called -synuclein . Proteins are chemical molecules that have a very specific shape. When some proteins dont have the correct shape a problem known as protein misfolding your body cant use them and can’t break them down.
With nowhere to go, the proteins build up in various places or in certain cells . The buildup of these Lewy bodies causes toxic effects and cell damage.
Induced Parkinsonism
The possible causes are:
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Some Disadvantages Of Mao
When selegiline is taken together with levodopa, side effects such as dyskinesias , hallunications or vivid dreaming may sometimes occur or worsen.
When people have taken rasagiline on its own , the most commonly reported side effects have been:
When taken with levodopa, the most common reports have been of uncontrolled movements and accidental falls.
Many of these side effects may be due to the increase in dopamine caused by rasagiline or selegiline. Your doctor or consultant can alter the dosage to correct these effects.
If youre taking some types of antidepressant, you might not be able to take MAO-B inhibitors, as these drugs can interact with each other to raise blood pressure to a dangerous level.
Your neurologist or pharmacist is the best person to advise on potential interactions with other medications.
Walking Or Gait Difficulties
Bradykinesia and postural instability both contribute to walkingor gaitdifficulties in Parkinsons, particularly as the disease progresses. A common, early symptom of Parkinsons disease is a decrease in the natural swing of one or both arms when walking. Later, steps may become slow and small, and a shuffling gait may appear. Gait problems in Parkinsons disease can also include a tendency to propel forward with rapid, short steps . People with advanced Parkinsons disease may experience episodes of freezing, in which the feet appear to be glued to the floor.
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Surgery For People With Parkinsons Disease
Deep brain stimulation surgery is an option to treat Parkinsons disease symptoms, but it is not suitable for everyone. There are strict criteria and guidelines on who can be a candidate for surgery, and this is something that only your doctor and you can decide. Surgery may be considered early or late in the progression of Parkinsons.
When performing deep-brain stimulation surgery, the surgeon places an electrode in the part of the brain most effected by Parkinsons disease. Electrical impulses are introduced to the brain, which has the effect of normalising the brains electrical activity reducing the symptoms of Parkinsons disease. The electrical impulse is introduced using a pacemaker-like device called a stimulator.
Thalamotomy and pallidotomy are operations where the surgeon makes an incision on part of the brain. These surgeries aim to alleviate some forms of tremor or unusual movement, but they are rarely performed now.
Dopamine Agonist Withdrawal Syndrome
If you suddenly stop taking dopamine agonists, this can lead to dopamine agonist withdrawal syndrome, which can cause symptoms such as depression, anxiety or pain.
Any withdrawal from Parkinsons drugs needs to be done in a tapered way, under the supervision of a health professional.
Speak to your specialist for advice.
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Advantages Of Comt Inhibitors
When used with levodopa, COMT inhibitors can reduce the daily off time and increase the on time.
In many cases, the dose and frequency of levodopa can also be reduced.
The terms on/off or motor fluctuations refer to the period when people can no longer rely on the smooth and even symptom control that their drugs once gave them.
Locating The Basal Ganglia
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The basal ganglia are collections of nerve cells located deep within the brain. They include the following:
The basal ganglia help initiate and smooth out muscle movements, suppress involuntary movements, and coordinate changes in posture. |
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Diagnosis Of Parkinsons Disease
There are currently no blood or laboratory tests to diagnose non-genetic cases of Parkinsons. Doctors usually diagnose the disease by taking a persons medical history and performing a neurological examination. If symptoms improve after starting to take medication, its another indicator that the person has Parkinsons.
A number of disorders can cause symptoms similar to those of Parkinsons disease. People with Parkinsons-like symptoms that result from other causes, such as multiple system atrophy and dementia with Lewy bodies, are sometimes said to have parkinsonism. While these disorders initially may be misdiagnosed as Parkinsons, certain medical tests, as well as response to drug treatment, may help to better evaluate the cause. Many other diseases have similar features but require different treatments, so it is important to get an accurate diagnosis as soon as possible.
Medicines For Parkinsons Disease
Medicines can help treat the symptoms of Parkinsons by:
- Increasing the level of dopamine in the brain
- Having an effect on other brain chemicals, such as neurotransmitters, which transfer information between brain cells
- Helping control non-movement symptoms
The main therapy for Parkinsons is levodopa. Nerve cells use levodopa to make dopamine to replenish the brains dwindling supply. Usually, people take levodopa along with another medication called carbidopa. Carbidopa prevents or reduces some of the side effects of levodopa therapy such as nausea, vomiting, low blood pressure, and restlessness and reduces the amount of levodopa needed to improve symptoms.
People living with Parkinsons disease should never stop taking levodopa without telling their doctor. Suddenly stopping the drug may have serious side effects, like being unable to move or having difficulty breathing.
The doctor may prescribe other medicines to treat Parkinsons symptoms, including:
- Dopamine agonists to stimulate the production of dopamine in the brain
- Enzyme inhibitors to increase the amount of dopamine by slowing down the enzymes that break down dopamine in the brain
- Amantadine to help reduce involuntary movements
- Anticholinergic drugs to reduce tremors and muscle rigidity
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Q: Are There Any Studies Of The Long
A: A recent study examined post-COVID symptoms in a small number of PD patients. Among the symptoms that persisted after COVID infection included worsening of motor function, increased levodopa daily dose requirements, fatigue, cognitive disturbances, and sleep disturbances. More research will need to be done to corroborate and expand on these findings.
General Advice On Taking Oral Antiparkinsonian Drugs
- Drugs improve most patients quality of life and the activities of daily living, even though they cannot cure Parkinsons disease nor prevent disease progression.
- Long-term use of antiparkinsonian drugs is usually necessary and abrupt withdrawal of the medication without medical supervision should be avoided.
- Good self-care can benefit patients enormously. Self-care includes things that you do to maintain good physical and mental health, prevent illness or accidents, and effectively deal with minor ailments and long-term conditions like having a balanced diet with regular exercise and adequate rest.
- Be familiar with the name and dosage of the antiparkinsonian drugs you are taking. Be cautious of their possible side effects.
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Medications For People With Parkinsons Disease
Symptoms of Parkinsons disease result from the progressive degeneration of nerve cells in the brain and other organs such as the gut, which produce a neurotransmitter called dopamine. This causes a deficiency in the availability of dopamine, which is necessary for smooth and controlled movements.
Medication therapy focuses on maximising the availability of dopamine in the brain. Medication regimes are individually tailored to your specific need. Parkinsons medications fit into one of the following broad categories:
- levodopa dopamine replacement therapy
- dopamine agonists mimic the action of dopamine
- COMT inhibitors used along with levodopa. This medication blocks an enzyme known as COMT to prevent levodopa breaking down in the intestine, allowing more of it to reach the brain
- anticholinergics block the effect of another brain chemical to rebalance its levels with dopamine
- amantadine has anticholinergic properties and improves dopamine transmission
- MAO type B inhibitors prevent the metabolism of dopamine within the brain.
There is no best medication treatment for Parkinsons. Each person has different symptoms, disease progression, lifestyle and physical tolerances. All of these factors will affect the timing, type, dose and combinations of medication.
As the disease progresses, your doctor will need to review and alter your medication program. Its is important to see a neurologist or a doctor who has experience in helping people with Parkinsons disease.
Symptoms Of Parkinsons Disease
Parkinsons has four main symptoms:
- Tremor in hands, arms, legs, jaw, or head
- Muscle stiffness, where muscle remains contracted for a long time
- Slowness of movement
- Impaired balance and coordination, sometimes leading to falls
Other symptoms may include:
The symptoms of Parkinsons and the rate of progression differ among individuals. Early symptoms of this disease are subtle and occur gradually. For example, people may feel mild tremors or have difficulty getting out of a chair. They may notice that they speak too softly, or that their handwriting is slow and looks cramped or small. Friends or family members may be the first to notice changes in someone with early Parkinsons. They may see that the persons face lacks expression and animation, or that the person does not move an arm or leg normally.
People with Parkinson’s disease often develop a parkinsonian gait that includes a tendency to lean forward take small, quick steps and reduce swinging their arms. They also may have trouble initiating or continuing movement.
Symptoms often begin on one side of the body or even in one limb on one side of the body. As the disease progresses, it eventually affects both sides. However, the symptoms may still be more severe on one side than on the other.
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How Is It Treated And Is There A Cure
For now, Parkinsons disease is not curable, but there are multiple ways to manage its symptoms. The treatments can also vary from person to person, depending on their specific symptoms and how well certain treatments work. Medications are the primary way to treat this condition.
A secondary treatment option is a surgery to implant a device that will deliver a mild electrical current to part of your brain . There are also some experimental options, such as stem cell-based treatments, but their availability often varies, and many aren’t an option for people with Parkinsons disease.
What Are The Symptoms
The best-known symptoms of Parkinson’s disease involve loss of muscle control. However, experts now know that muscle control-related issues aren’t the only possible symptoms of Parkinson’s disease.
Motor-related symptoms
Motor symptoms which means movement-related symptoms of Parkinsons disease include the following:
Additional motor symptoms can include:
- Blinking less often than usual. This is also a symptom of reduced control of facial muscles.
- Cramped or small handwriting. Known as micrographia, this happens because of muscle control problems.
- Drooling. Another symptom that happens because of loss of facial muscle control.
- Mask-like facial expression. Known as hypomimia, this means facial expressions change very little or not at all.
- Trouble swallowing . This happens with reduced throat muscle control. It increases the risk of problems like pneumonia or choking.
- Unusually soft speaking voice . This happens because of reduced muscle control in the throat and chest.
Non-motor symptoms
Several symptoms are possible that aren’t connected to movement and muscle control. In years past, experts believed non-motor symptoms were risk factors for this disease when seen before motor symptoms. However, theres a growing amount of evidence that these symptoms can appear in the earliest stages of the disease. That means these symptoms might be warning signs that start years or even decades before motor symptoms.
Non-motor symptoms include:
Stages of Parkinsons disease
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Editorial Sources And Fact
- Parkinsons Disease: Diagnosis & Treatment. Mayo Clinic. December 8, 2020.
- Pringsheim T, Day GS, Smith DB, et al. Dopaminergic Therapy for Motor Symptoms in Early Parkinson Disease Practice Guideline Summary: A Report of the AAN Guideline Subcommittee. Neurology. November 15, 2021.
- Levodopa and Carbidopa. MedlinePlus. June 15, 2018.
Strategies To Improve Your Sexual Health
These challenges can naturally make anyone with PD concerned. Your first step should be speaking openly and honestly with your healthcare provider about what you are experiencing. Remember that these issues are not uncommon in people with Parkinson’s and your practitioner is there to help.
In particular, see your healthcare provider to:
- Identify the root cause of the problem. If it is related to depression, treat the depression if it is related to a reduction in sex hormones, ask your healthcare provider about hormone replacement therapy, and so forth.
- Review your medications. Sometimes the root problem is the dose of PD medication you are on. Consult with your PD practitioner about adjusting the dose.
You can also take steps that may be helpful on your own:
- Engage in vigorous exercise whenever you can as it will improve physical stamina, libido, and mobility.
- Seek out physical therapy to improve mobility.
- Try cognitive-behavioral therapy and psychotherapy, which may help you talk through worries, fears, and feelings of loss. Getting beyond these negative feelings may allow you to more fully enjoy the moment with your partner.
- Consider taking a massage class with your partner to find new ways to maintain intimacy while you are struggling with sexual dysfunction.
- Talk with your partner about what you are going through. Understanding starts with open dialogue.
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