Tolcapone Tablet: Uses, Dosage, Side Effects, Precautions and Alternates

Quick overview

Tolcapone Tablet (generic name tolcapone) is a prescription COMT inhibitor used together with carbidopa and levodopa to manage Parkinson's disease symptoms. It is typically given to people whose symptoms are not well controlled on carbidopa and levodopa alone, especially those with motor fluctuations who have not responded well to other add-on treatments. It works by helping levodopa stay active longer in the body, which can reduce "wearing-off" periods between doses.

What is Tolcapone Tablet

Tolcapone is a prescription medicine used together with carbidopa and levodopa to treat the symptoms of Parkinson's disease, such as stiffness, tremors, muscle spasms, and poor muscle control. It belongs to the COMT inhibitor (dopaminergic antiparkinsonism agent) drug class.

Tolcapone Tablet uses

• Used along with levodopa and carbidopa to treat symptoms of Parkinson's disease
• Given to people who are already taking carbidopa and levodopa but whose symptoms are not well controlled
• Reserved for people with motor fluctuations who have not responded well to other add-on treatments

Benefits of Tolcapone Tablet

• Helps levodopa last longer in the body so symptoms do not return between doses
• Reduces "wearing-off" periods and extends smooth symptom control ("on" time)
• Can improve body stiffness and tremors when added to levodopa/carbidopa

How Tolcapone Tablet works

Tolcapone blocks an enzyme called COMT that normally breaks down levodopa in the body. By blocking this enzyme, it helps levodopa stay active longer, giving more steady control of Parkinson's symptoms.

Tolcapone Tablet dosage

Take Tolcapone Tablet by mouth with a glass of water, with or without food. If it upsets your stomach, taking it with food may help. It must always be used together with carbidopa and levodopa, not on its own. It is usually taken three times a day, with the first dose taken alongside your first daily dose of carbidopa and levodopa, and the other doses spaced several hours apart. Take it at the same times each day to help you remember, and keep taking it unless your care team tells you to stop.

Do not stop suddenly without talking to your doctor, since stopping abruptly can cause serious withdrawal symptoms. If you miss a dose, take it as soon as you remember, but skip it if it is almost time for your next dose - never double up. Tell your doctor if your symptoms do not improve after a few weeks of treatment. Use in children has not been studied; talk to your care team about use in children.

Available forms and strengths

• Tablet

Side effects of Tolcapone Tablet

Common

• Nausea and vomiting
• Diarrhea
• Dizziness or lightheadedness
• Drowsiness
• Loss of appetite
• Trouble sleeping or vivid/excessive dreaming
• Constipation
• Dry mouth
• Increased sweating
• Muscle cramps
• Harmless bright yellow or orange-brown discoloration of urine

Serious

• Signs of liver injury: right upper belly pain, loss of appetite, nausea, light-colored stools, dark yellow or brown urine, yellowing of skin or eyes, unusual weakness or fatigue
• Falling asleep suddenly during daily activities such as driving, talking, or eating
• Hallucinations, confusion, or new/worsening mental changes
• Severe or prolonged diarrhea
• Signs of muscle injury: unusual weakness, muscle pain, dark urine, decreased urine output
• Low blood pressure: dizziness, feeling faint, blurry vision, fainting when standing up
• Uncontrolled or jerky body movements (dyskinesia)
• Urges to engage in impulsive behaviors such as gambling, binge eating, or shopping
• Allergic reaction: rash, itching, hives, swelling of face, lips, tongue, or throat, difficulty breathing
• Fever, confusion, and severe muscle rigidity after stopping the medicine suddenly

Warnings and precautions

• Tolcapone carries a serious warning for sudden, potentially fatal liver failure, so regular blood tests to check liver function are required while taking it
• Do not stop taking this medicine suddenly, because doing so can cause high fever and severe muscle stiffness
• This medicine can cause sudden sleep episodes, even during activities such as driving, without feeling drowsy beforehand
• Some people develop strong, hard-to-control urges such as gambling, overeating, or increased sexual urges while on this medicine
• This medicine may increase the risk of skin cancer (melanoma), so check your skin regularly for new growths or changes to moles
• If there is no clear benefit within three weeks of starting treatment, your doctor will typically stop the medicine
• Do not take this medicine if you have used certain MAO inhibitor medicines in the past two weeks, as a dangerous interaction can occur
• This medicine should not be started or continued if you have liver disease or abnormal liver tests, since it can cause serious, even life-threatening liver problems. Regular blood tests to check liver function are required.
• People with severe kidney problems may process this medicine more slowly, which can raise the risk of side effects. Tell your doctor if you have kidney disease.
• It is not known whether tolcapone could harm an unborn baby. Tell your doctor if you are pregnant or planning to become pregnant so the risks and benefits can be weighed.
• There isn't enough information on whether this medicine is safe during breastfeeding. Talk to your doctor to weigh the benefits against possible risks.
• Drinking alcohol while taking this medicine can increase dizziness, drowsiness, and other side effects.
• This medicine can affect your coordination, reaction time, and judgment, and can cause sudden sleep onset even during activities like driving. Do not drive or use machinery until you know how it affects you.

Storage

• Store at room temperature between 20 and 25 degrees C (68 and 77 degrees F)
• Keep container tightly closed
• Keep away from heat, moisture, and direct light
• Keep from freezing
• Keep out of the reach of children and pets
• Get rid of any unused medication after the expiration date
• Take the medication to a take-back program when no longer needed
• If a take-back program is not available, check the label or ask your care team whether it can be thrown in the trash or flushed; if trash disposal is safe, mix it with something like cat litter or coffee grounds, seal it in a bag, and throw it away

When to see a doctor

• Get emergency help right away for signs of a severe allergic reaction, such as hives, trouble breathing, or swelling of the face, lips, tongue, or throat
• Call your doctor immediately if you notice signs of liver problems, such as nausea, loss of appetite, pain in the upper right stomach area, tiredness, dark urine, pale stools, or yellowing of the skin or eyes
• Seek help right away for unexplained muscle pain, tenderness, or weakness, especially with fever, tiredness, or dark urine, as this can signal a rare but serious muscle breakdown problem
• Contact your doctor at once if you feel like you might faint, have ongoing or severe diarrhea, or experience confusion, hallucinations, or unusual thoughts or behavior
• Get medical attention right away if your tremors, stiffness, or muscle spasms get worse
• If you suspect an overdose, seek emergency medical help right away, as it can cause vomiting and severe dizziness
• Contact your doctor right away if you unexpectedly fall asleep during daily activities like driving, talking, or eating

Alternatives

• Selegiline
• Safinamide
• Rasagiline
• Entacapone