What is Entacapone used for?
Entacapone is commonly used with other medications (levodopa/carbidopa) to treat Parkinson’s disease. Entacapone belongs to a class of drugs known as COMT inhibitors. Many people taking levodopa for Parkinson’s have problems with the effects of the levodopa wearing off between scheduled doses, causing symptoms to return or worsen. Entacapone blocks a certain natural substance (COMT enzyme) that breaks down the levodopa in the body. This effect allows the levodopa to last longer in the system so that it doesn’t wear off before the next dose.
How should I take Entacapone?
Take this medication by mouth with or without food, usually with each prescribed dose of levodopa/carbidopa (up to 8 times daily) or as directed by your doctor.
Dosage is based on your medical condition, liver function, and response to therapy.
Use this medication regularly to get the most benefit from it. To help you remember, take it at the same times each day. Do not suddenly stop taking this medication unless instructed to do so by your doctor. Doing so may cause your Parkinson’s symptoms to become much worse.
Tell your doctor if your condition persists or worsens (such as your Parkinson’s symptoms are not controlled).
How do I store Entacapone?
Entacapone is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store Entacapone in the bathroom or the freezer. There may be different brands of Entacapone that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.
You should not flush Entacapone down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.
Precautions & warnings
What should I know before using Entacapone?
Before taking entacapone, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: alcoholism, liver problems, low blood pressure, mental/mood disorders (such as depression, schizophrenia), sleep disorders.
This drug may make you dizzy or drowsy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
Older adults may be more sensitive to the side effects of this drug, especially drowsiness and confusion.
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.
It is unknown if this drug passes into breast milk. Consult your doctor before breast-feeding.
Is it safe during pregnancy or breast-feeding?
There are no adequate studies in women for determining risk when using this Entacapone during pregnancy or while breastfeeding. Please always consult with your doctor to weigh the potential benefits and risks before taking this Entacapone. This Entacapone is pregnancy risk category C according to the US Food and Drug Administration (FDA).
FDA pregnancy risk category reference below:
- A=No risk,
- B=No risk in some studies,
- C=There may be some risk,
- D=Positive evidence of risk,
What side effects can occur from Entacapone?
Nausea, vomiting, diarrhea, unwanted/uncontrolled movements, increased sweating, drowsiness, tiredness, dry mouth, gas, and abdominal pain may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
Lightheadedness or dizziness upon standing may also occur, especially during the first few weeks of treatment. To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication may develop serious side effects, but with frequent visits to your doctor, this risk can be minimized.
Some people taking entacapone have fallen asleep suddenly during their usual daily activities (such as talking on the phone, driving). In some cases, sleep occurred without any feelings of drowsiness beforehand. This sleep effect may occur anytime during treatment with entacapone even if you have used this medication for a long time. If you experience increased sleepiness or fall asleep during the day, do not drive or take part in other possibly dangerous activities until you have discussed this effect with your doctor. Your risk of this sleep effect is increased by using alcohol or other medications that can make you drowsy. See also Precautions section.
Your urine may turn brownish-orange. This effect is harmless.
Tell your doctor right away if you have any serious side effects, including: mental/mood changes (such as confusion, hallucinations), unusual strong urges (such as increased gambling, increased sexual urges), fever, muscle stiffness, persistent diarrhea, easy bleeding/bruising, sore/painful muscles, muscle weakness, trouble breathing, pain with breathing.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
Not everyone experiences these side effects. There may be some side effects not listed above. If you have any concerns about a side-effect, please consult your doctor or pharmacist.
What drugs may interact with Entacapone?
Some of the products that may interact with this drug include: certain MAO inhibitors (isocarboxazid, linezolid, methylene blue, moclobemide, phenelzine, procarbazine, tranylcypromine).
Other MAO inhibitors (safinamide, selegiline, rasagiline) may be used cautiously with close monitoring by your doctor. If you are taking rasagiline or selegiline for Parkinson’s disease, ask your doctor if you should continue taking it.
Entacapone can slow down the removal of other drugs from your body, thereby affecting how they work. These affected drugs include apomorphine, dobutamine, and methyldopa. This is not a complete list.
Tell your doctor or pharmacist if you are taking other products that cause drowsiness including alcohol, marijuana, antihistamines (such as cetirizine, diphenhydramine), drugs for sleep or anxiety (such as alprazolam, diazepam, zolpidem), muscle relaxants, and narcotic pain relievers (such as codeine).
Check the labels on all your medicines (such as allergy or cough-and-cold products) because they may contain ingredients that cause drowsiness. Ask your pharmacist about using those products safely.
Entacapone may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.
Does food or alcohol interact with Entacapone?
Entacapone may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.
What health conditions may interact with Entacapone?
Entacapone may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have.
The information provided is not a substitute for any medical advice. You should ALWAYS consult with your doctor or pharmacist before using this Entacapone.
What is the dose of Entacapone for an adult?
Usual Adult Dose for Parkinson’s Disease
200 mg orally concomitantly with each dose of levodopa-carbidopa up to a maximum of 8 times a day
Maximum dose: 1600 mg per day
-Upon initiation, a majority of patients required levodopa dose reductions or an extension of the interval between their levodopa doses, especially those receiving levodopa doses of 800 mg/day or greater, and patients with baseline moderate or severe dyskinesia.
Use: As an adjunct to levodopa-carbidopa to treat end-of-dose “wearing-off” in patients with Parkinson’s disease.
Renal Dose Adjustments
No adjustment recommended
Liver Dose Adjustments
Dose adjustment may be required; however, no specific guidelines have been suggested. Caution is recommended.
When discontinuing therapy, monitor patients closely and adjust other dopaminergic treatments as needed; no specific dose reduction is recommended, although tapering seems prudent.
-May be taken with or without food
-This drug should be taken at least 2 to 3 hours apart from iron; taken together, they may form chelates in the gastrointestinal tract
-This drug has no antiparkinsonian effect of its own and it must be administered with levodopa-carbidopa.
-May be combined with both the immediate and sustained-release formulations of levodopa and carbidopa.
-Cardiovascular: Monitor for signs and symptoms of orthostatic hypotension, particularly during dose escalation..
-Nervous System: Monitor for somnolence and drowsiness
-Dermatologic: Monitor for melanomas; consider periodic skin examinations by dermatologists.
-Psychiatric: Question patients about new or increased gambling urges, sexual urges, uncontrolled spending, binge or compulsive eating, or other urges.
-Tell patients that this drug may cause a brownish orange discoloration of their urine that is of no concern.
-This drug frequently causes drowsiness; patients should not drive a car or operate machinery or other potentially dangerous activities until it is determined how this drug affects their mental and/or motor performance.
-Patients should be instructed to report episodes of sudden onset of sleep, new or worsening dyskinesia, new or worsening compulsive behaviors and/or unusual urges.
-Patients should be instructed to report changes in the size, shape, or color of moles on their skin and should have their skin checked on a regular basis for melanomas.
-Patients should be aware that this drug may cause orthostatic blood pressure changes including fainting and dizziness and patients are advised to avoid standing rapidly after sitting or lying down.
-Patients should speak to their physician or health care provider if they become pregnant, intend to become pregnant, or are breastfeeding.
What is the dose of Entacapone for a child?
The dosage has not been established in pediatric patients. It may be unsafe for your child. It is always important to fully understand the safety of the drug before using. Please consult with your doctor or pharmacist for more information.
How is Entacapone available?
Entacapone is available in the following dosage forms and strengths:
What should I do in case of an emergency or overdose?
In case of an emergency or an overdose, call your local emergency services or go to your nearest emergency room.
What should I do if I miss a dose?
If you miss a dose of Entacapone, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.
Hello Health Group does not provide medical advice, diagnosis or treatment.
Review Date: January 24, 2018 | Last Modified: September 12, 2019
Entacapone. https://www.webmd.com/drugs/2/drug-17763/entacapone-oral/details. Accessed January 24, 2018.
Entacapone Dosage. https://www.drugs.com/dosage/entacapone.html. Accessed January 24, 2018.