Entacapone
About Entacapone
Entacapone is a prescription medication used to treat patients with Parkinson's disease who are experiencing 'wearing-off' symptoms. It is prescribed alongside standard Parkinson's therapies to help prolong the effectiveness of those treatments and maintain steadier muscle control. This medication serves to reduce the sudden return of motor symptoms, such as muscle stiffness, tremors, and slow movement, between your regularly scheduled doses.
To achieve the best results, you must take Entacapone consistently with each of your primary Parkinson's medication doses throughout the day. You can take this tablet with or without food, though maintaining a consistent routine is highly recommended. Incorporating regular, gentle physical therapy and keeping a structured daily routine can significantly support your physical mobility and overall treatment outcomes.
While taking Entacapone, some people may experience mild side effects like a harmless change in urine colour or slight nausea. However, you must contact your doctor immediately if you experience severe or persistent diarrhoea, confusion, or unusual, severe muscle pain. These serious symptoms require prompt medical evaluation to ensure your safety throughout therapy.
Before starting Entacapone, talk to your doctor if you have a history of liver damage, severe muscle disorders, or skin conditions. Do not take this if you have had a severe allergic reaction to this medication in the past, or if you have a history of neuroleptic malignant syndrome (a rare but serious reaction to certain medicines) or non-traumatic muscle breakdown. Your doctor will carefully review your medical history to ensure this is the right option for you.
This medication can interact with other substances, such as iron supplements and certain types of antidepressants, which can reduce its effectiveness or cause unwanted side effects. Avoid alcohol while taking Entacapone, as it can significantly increase dizziness and drowsiness. If you are pregnant, breastfeeding, or are an older adult, talk to your doctor or pharmacist to discuss your specific risks and benefits.
Uses of Entacapone
Medicinal Benefits
Entacapone helps improve movement control in people with Parkinson's disease by maintaining more consistent levels of therapy throughout the day. Key benefits include:
- Increases 'On' Time: By helping maintain stable treatment effects, Entacapone increases the amount of time during the day when movement is better controlled, reducing periods of symptom recurrence.
- Provides Smoother Motor Control: By reducing fluctuations in movement, Entacapone helps minimise episodes of stiffness, slowness, and impaired mobility, supporting more consistent physical function.
- Supports Daily Activities: By improving motor control, Entacapone helps make everyday tasks such as walking, eating, writing, and other routine activities easier, promoting greater independence and quality of life.
Directions for Use
- Entacapone can be taken with food or as directed by your doctor.
- It is best advised to take Entacapone at the same time each day to get effective results.
- Swallow the tablet as a whole with a glass of water.
- Do not chew, crush or break it.
Storage
Side Effects of Entacapone
Common Side Effects (Usually mild):
- Urine turning a brownish-orange or reddish colour (this is harmless)
- Mild nausea or upset stomach
- Dizziness or feeling lightheaded
- Dry mouth
Serious Side Effects (Call a doctor right away):
- Severe, persistent, or watery diarrhoea
- Hallucinations, confusion, or unusual changes in behaviour
- Severe, unexplained muscle pain, tenderness, or weakness
- Fainting or severe dizziness upon standing up
- Signs of an allergic reaction, such as a skin rash, itching, or swelling of the face, lips, or throat
Medicines Containing this Salt
View AllDrug Warnings
- Expect urine colour changes: Do not be alarmed if your urine turns reddish-brown or orange while taking Entacapone. This is a harmless and expected effect of the medicine.
- Stand up slowly: Rise gradually from a sitting or lying position, as this medicine may cause a sudden drop in blood pressure, leading to dizziness, light-headedness, or falls.
- Do not stop treatment suddenly: Never discontinue Entacapone without consulting your doctor. Stopping the medicine abruptly may cause a serious reaction with high fever, severe muscle stiffness, confusion, and changes in consciousness.
- Use caution with activities requiring alertness: This medicine may cause severe drowsiness or sudden episodes of falling asleep. Avoid driving, operating machinery, or performing hazardous tasks until you know how it affects you.
- Report severe diarrhoea promptly: If you develop persistent or severe diarrhoea, stop taking the medicine and contact your healthcare provider immediately, as prolonged diarrhoea can lead to dehydration and electrolyte imbalance.
Drug Interactions
Inform your doctor if you are taking any of the following medicines, as they may interact.
- Non-selective MAO inhibitors: Combining this medicine with certain antidepressants (such as phenelzine or tranylcypromine) can cause dangerously high blood pressure.
- Iron supplements: Taking iron pills or multivitamins containing iron at the same time can greatly reduce the absorption and effectiveness of Entacapone.
- COMT-metabolized drugs: It may increase the effects of medications like epinephrine, norepinephrine, or dobutamine, which can affect your heart rate and blood pressure.
Drug-Drug Interactions Checker List:
Safety Advice
Alcohol
unsafeTaking the drug along with alcohol may increase the side effects such as confusion, drowsiness and trouble in concentration.
Pregnancy
cautionEntacapone is generally not recommended for use in pregnancy. If you are pregnant, please consult your doctor before taking this medicine. Your doctor may prescribe this medicine if the benefits outweigh the risks.
Breast Feeding
cautionNo clinical use of Entacapone during breastfeeding has been reported. The drug might reduce serum prolactin and may affect milk production. If you are breastfeeding, consult your doctor before taking Entacapone.
Driving
cautionEntacapone may cause low blood pressure that further cause drowsiness and dizziness. So, it is not recommended to drive or operate heavy machinery after taking Entacapone.
Liver
cautionEntacapone should be used with caution in patients with liver disease. If you have liver problems, your doctor may adjust the dose of Entacapone or prescribe a suitable alternative based on your condition.
Kidney
cautionEntacapone should be used with caution in patients with kidney disease. If you have kidney problems, your doctor may adjust the dose of Entacapone or prescribe a suitable alternative based on your condition.
Children
cautionEntacapone is not recommended for use in children under 18 years as the safety and effectiveness were not established. Consult a child specialist for further information.
Habit Forming
Diet & Lifestyle Advise
- Protein timing: Large amounts of dietary protein can compete with your companion Parkinson's medications for absorption. Talk to your doctor or a dietitian about how to space out high-protein foods throughout the day.
- Stay hydrated: Drink plenty of water throughout the day to help manage common issues like dry mouth and to support healthy bowel movements.
- Avoid alcohol: Consuming alcohol while taking this medicine can worsen dizziness and make you feel extremely drowsy, increasing the risk of falls.
- Space iron supplements: If you take iron pills, make sure to take them at least 2 to 3 hours before or after taking Entacapone, as iron can bind to the medication and stop your body from absorbing it properly.
Special Advise
- Entacapone may cause diarrhea, if you experience diarrhea, drink plenty of water; if symptoms persist, consult your doctor immediately. Do not take anti-diarrhea medicine on your own.
Patients Concern
Disease/Condition Glossary
Parkinson’s disease (PD): It is also known as a movement disorder that mainly affects a person's ability to perform regular activities. It is a chronic and progressive disorder that can worsen with time if proper treatment is not provided at the right time. Some common symptoms include tremors at rest, stiffness of the limbs and slowness of movement, difficulty in movement or walking and impaired balance. Other motor symptoms include trouble solving problems, small handwriting, stooped posture, etc. This disease also affects the brain's ability to work properly, such as sleep disturbances, reduced ability to smell, depression, fatigue and anxiety. However, the symptoms of this disease vary from person to person. There are certain neurons present in the brain that are responsible for making dopamine. This neurotransmitter helps to regulate the movement of the body. Loss of dopamine is supposed to be the primary reason for the occurrence of Parkinson's disease.
FAQs
This is a completely harmless side effect. The medication has a natural color that passes through your kidneys and is excreted in your urine. It does not mean there is blood in your urine, but it can stain clothing. Talk to your doctor if you have concerns.
Yes. Entacapone, especially when taken together with levodopa, can cause significant daytime drowsiness and, in some people, sudden episodes of falling asleep during normal activities such as driving, eating, or talking. Do not drive or operate machinery until you know how this medicine affects you. Contact your doctor if you experience excessive sleepiness or sudden sleep episodes.
No, Entacapone does not work on its own. It is designed specifically to assist other Parkinson's medications, like levodopa, by preventing them from breaking down too quickly in your body. It must always be taken together with your companion Parkinson's treatment. Talk to your doctor for more details.
You can take Entacapone either with or without food. The most important thing is to be consistent with how you take it each day and to make sure you take it at the exact same time as your companion Parkinson's medication. Talk to your doctor or pharmacist if you need help planning your schedule.
Severe, persistent diarrhea is a recognized side effect that can occur even after weeks or months of taking this medicine. If you experience this, contact your doctor right away, as it can cause serious dehydration, and your doctor may advise you to stop taking the medication.
Iron can bind to Entacapone in your stomach, which prevents your body from absorbing the medicine. If you must take iron supplements or multivitamins containing iron, take them at least 2 to 3 hours before or after you take your medication. Talk to your doctor or pharmacist to help schedule your doses safely.
Because Entacapone is absorbed quickly, it begins working alongside your primary Parkinson's medication with your very first doses. You should notice a reduction in your 'wearing-off' symptoms and more consistent movement control within a few days. Talk to your doctor if you do not notice any improvement.
No, you should never stop taking this medication suddenly. Doing so can cause a severe, dangerous reaction characterised by high fever, muscle rigidity, and rapid changes in blood pressure. If you need to stop or change your treatment, your doctor will guide you on how to do so safely. Talk to your doctor before making any changes.

