Crexont XR Side Effects: What to Expect and When to Call Your Doctor

Understanding Crexont XR Side Effects

Crexont XR (Carbidopa/Levodopa extended-release capsules) is a medication used to treat Parkinson's disease. Like all medications, it can cause side effects. Most are mild and manageable, but some require immediate medical attention.

This guide covers the most common and serious side effects of Crexont XR so you know what to watch for. If you're still learning about this medication, check out our overview of Crexont XR first.

Common Side Effects of Crexont XR

These side effects happen in a noticeable number of patients. They are usually mild and may improve as your body adjusts to the medication:

• Nausea — One of the most common side effects. Taking Crexont XR with a small snack (not high in protein) may help. Avoid high-protein meals close to dosing, as protein can interfere with absorption.
• Dizziness — You may feel lightheaded, especially when standing up quickly. This is related to a drop in blood pressure called orthostatic hypotension.
• Headache — Usually mild and temporary.
• Insomnia — Difficulty falling or staying asleep. Try taking your last dose earlier in the day if this is a problem.
• Abnormal dreams — Vivid or unusual dreams are reported by some patients.
• Dry mouth — Staying hydrated and using sugar-free gum or candies can help.
• Dyskinesia — Involuntary movements such as twisting, fidgeting, or jerking. This is more common at higher doses.
• Anxiety — Some patients report increased nervousness.
• Constipation — Eating fiber-rich foods, staying hydrated, and staying active can help.
• Vomiting — Less common than nausea but can occur, especially early in treatment.

Serious Side Effects: When to Call Your Doctor

Contact your doctor right away if you experience any of the following:

Severe Dyskinesia

While mild involuntary movements are common, severe or uncontrollable dyskinesia may mean your dose needs adjustment. Don't change your dose on your own — call your doctor.

Hallucinations and Psychosis

Some patients may see, hear, or believe things that aren't real. This can include visual hallucinations (seeing things), paranoia, or confusion. Call your doctor immediately if this happens.

Impulse Control Problems

Crexont XR may cause new or increased urges that are hard to control, including:

• Gambling
• Excessive spending or shopping
• Binge eating
• Increased sexual urges

These behaviors can be distressing and harmful. Tell your doctor or a family member if you notice any changes in your behavior.

Falling Asleep During Daily Activities

Some patients have fallen asleep during activities like driving, eating, or talking without warning. Do not drive or operate heavy machinery until you know how Crexont XR affects you. If you experience sudden sleepiness, tell your doctor right away.

Melanoma Risk

Studies suggest that people with Parkinson's disease may have a higher risk of melanoma (a type of skin cancer). While it's not clear if Carbidopa/Levodopa medications increase this risk further, you should have regular skin exams and report any new or changing moles to your doctor.

Depression and Suicidal Thoughts

Some patients may develop depression or have suicidal thoughts while taking Crexont XR. Tell your doctor or seek help immediately if you feel persistently sad, hopeless, or have thoughts of harming yourself.

Neuroleptic Malignant Syndrome (NMS)

If Crexont XR is stopped suddenly, you may develop a rare but serious condition called NMS. Symptoms include high fever, stiff muscles, confusion, and irregular heartbeat. Never stop Crexont XR abruptly — your doctor should taper your dose gradually.

Increased Eye Pressure

Patients with narrow-angle glaucoma should not take Crexont XR. If you have glaucoma, tell your doctor before starting this medication.

Orthostatic Hypotension: A Common but Important Side Effect

Orthostatic hypotension means your blood pressure drops when you stand up, causing dizziness or even fainting. To reduce the risk:

• Stand up slowly from sitting or lying down.
• Stay well hydrated.
• Avoid alcohol, which can make it worse.
• Tell your doctor if this happens frequently.

Side Effects and Drug Interactions

Some side effects may be worse if you take other medications alongside Crexont XR. For example, MAO-B inhibitors like Rasagiline or Selegiline may increase the risk of orthostatic hypotension. Check our Crexont XR drug interactions guide for a full list of medications to discuss with your doctor.

How to Manage Common Side Effects

Here are practical tips for dealing with the most common issues:

1. For nausea: Take Crexont XR with a light, low-protein snack. Avoid taking it on an empty stomach if nausea is a problem.
2. For dizziness: Change positions slowly. Sit on the edge of the bed for a minute before standing.
3. For insomnia: Talk to your doctor about adjusting your dosing schedule.
4. For constipation: Increase fiber and fluid intake. Ask your doctor about a stool softener if needed.
5. For dyskinesia: Don't adjust your dose on your own. Your doctor may lower the dose or change the timing.

When Side Effects May Mean a Dose Change

If you experience persistent or worsening side effects, your doctor may need to adjust your Crexont XR dose. Crexont XR comes in multiple strengths, giving your doctor flexibility to find the right balance between symptom control and side effects. Learn more about dosing options in our full guide.

Reporting Side Effects

You can report side effects to the FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch. Reporting helps improve safety information for everyone taking Crexont XR.

The Bottom Line

Most Crexont XR side effects are mild and manageable. Nausea, dizziness, and headache are the most common. Serious side effects like hallucinations, impulse control problems, and sudden sleepiness need immediate medical attention. Never stop Crexont XR suddenly, and always talk to your doctor before changing your dose.

If you're having trouble finding Crexont XR at your pharmacy, learn how to locate it in stock near you or use MedFinder to search pharmacies.