Rizaxus

Rizaxus Uses, Dosage, Side Effects, Mechanism of Action, How Long Does it Take to Work? Rizaxus is a brand name. Its generic name is Rizatriptan.

Rizaxus: Introduction

Rizaxus (Maxalt, Maxalt-MLT) is a serotonin 5-HT1B/1D receptor agonist and antimigraine drug. It is used to treat acute migraine attacks, with or without aura (temporary visual disturbances or other symptoms), in adults. Rizaxus relieves migraine pain and associated symptoms such as nausea and sensitivity to sound and light.

Uses For

Rizaxus is used to treat the symptoms of migraine headaches (severe, throbbing headaches that sometimes are accompanied by nausea and sensitivity to sound and light). Rizaxus will not prevent the occurrence of migraine headaches.

Mechanism of Action

Rizaxus is a serotonin 5-HT1B/1D receptor agonist with antimigraine activity. It binds selectively and with high affinity to 5-HT1B and 5-HT1D receptors, resulting in serotonin-mediated constriction of arteriolar blood vessels in the brain, relief from pain, and a decrease in inflammation. It is also thought to inhibit release of neuropeptides such as CGRP (calcitonin gene-related peptide), which is associated with migraine.

How Long Does it Take to Work?

Rizaxus usually begins to work within 30 minutes of taking the tablet, and reaches its peak effect within two hours.

Absorption

Rizaxus is rapidly and well-absorbed from the gastrointestinal tract. The absolute bioavailability is 25%, because of presystemic metabolism. Peak plasma concentrations occur 1-2 hours after oral administration. The bioavailability of Maxalt-MLT (a lyophilized orally disintegrating tablet) is comparable to that of Maxalt.

Route of Elimination

Rizaxus is eliminted primarily by hepatic metabolism and biliary excretion of metabolites. The drug has a plasma terminal elimination half-life of about 2 to 3 hours.

Dosage

The usual recommended adult dose of rizatriptan is 5 to 10 mg. Dose can be increased to a maximum of 30 mg in a 24-hour period.

Administration

Rizaxus tablets should be taken whole. They should not be chewed, split, or dissolved. Maxalt-MLT orally disintegrating tablets should be placed on the tongue and allowed to dissolve without being chewed or swallowed.

Side Effects

The most common side effects of rizatriptan include dizziness, headache, fatigue, dry mouth, and nausea. Less common side effects include chest pain, flushing or warmth, hot flashes, muscle tightness or pain, sleepiness, tingling sensations, throat irritation, tightness or heaviness.

Toxicity

Overdoses of rizatriptan can produce symptoms of serotonin syndrome, including agitation, confusion, fast heartbeat, sweating, tremor, diarrhea, or vomiting.

Precautions

Before using rizatriptan, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. Rizaxus should not be used if you have certain medical conditions, such as ischemic heart disease, coronary artery vasospasm, history of stroke or TIA, or hemiplegic or basilar migraine.

Interactions

Rizaxus may interact with other medications such as MAO inhibitors, propranolol, dihydroergotamine, or St. John's wort. Tell your doctor all medications you are currently taking, including those over-the-counter.

Disease Interactions

Rizaxus is not recommended in patients with ischemic heart disease, coronary artery vasospasm, history of stroke or TIA, or hemiplegic or basilar migraine.

Drug Interactions

Rizaxus may interact with MAO inhibitors, propranolol, dihydroergotamine, or St. John's wort. Tell your doctor all medications you are currently taking, including those over-the-counter.

Food Interactions

Rizaxus should be taken at least two hours after or one hour before a meal. Taking Rizaxus with food may increase the rate of absorption, resulting in increased systemic exposure and increased the risk of side effects.

Pregnancy Use

Rizaxus should not be used in pregnant women unless the potential benefit outweighs the potential risk to the fetus.

Lactation Use

It is not recommended to use rizatriptan during breastfeeding. Consult your doctor before taking this medication during lactation.

Acute Overdose

Symptoms of an acute overdose of rizatriptan may include nausea, vomiting, confusion, dizziness, double vision, dizziness, sweating, tremor, diarrhea, or vomiting.

Contraindication

Rizaxus is contraindicated in patients with ischemic heart disease, coronary artery vasospasm, history of stroke or TIA, or hemiplegic or basilar migraine.

Use Directions

To take rizatriptan, you should take one 5 to 10 mg tablet with water as soon as you experience migraine symptoms. Do not take more than 30 mg in 24 hours. If the headache returns after a period of relief, you can take second dose 2 hours later (maximum 30 mg per day). Do not take rizatriptan more than twice every 24 hours. If the symptoms do not improve, contact your doctor.

Storage Conditions

Rizaxus should be stored at room temperature, away from heat, moisture, and light. Keep out of reach of children.

Volume of Distribution

The average apparent volume of distribution of rizatriptan is about 165 liters.

Half Life

The elimination half-life of rizatriptan is approximately 2-3 hours.

Clearance

The apparent clearance of rizatriptan after intravenous administration is approximately 10 liters/hour.

Here you find in details version of Rizaxus

Some Frequently Asked Questions About Rizaxus

What is Rizaxus?

Rizaxus is a medication used to treat migraine headaches. It is a prescription medication available in tablet and orally disintegrating tablet form.

What is the generic name for Rizaxus?

The generic name for Rizaxus is rizatriptan benzoate.

How does Rizaxus work?

Rizaxus works by narrowing the blood vessels around the brain and relieving the symptoms of a migraine headache. It also helps to reduce substances in the body that can cause headache, nausea, sensitivity to light and sound, and other migraine symptoms.

How long does it take for Rizaxus to work?

Rizaxus usually begins to work within 30 minutes after taking the tablet. However, it can take up to two hours for the full effects of the medication to be felt.

How much does Rizaxus cost?

The cost of Rizaxus will depend on the dosage and quantity prescribed. It is recommended that you speak with your healthcare provider to determine the cost of your prescription.

What are the potential side effects of Rizaxus?

The most common side effects of Rizaxus include drowsiness, dizziness, tingling or numbness in extremities, fatigue, muscle or body aches, and nausea. Other more serious side effects include an irregular heartbeat, chest pain, and difficulty breathing. If you experience any of these side effects, contact your healthcare provider immediately.

Can I take Rizaxus while pregnant?

It is not recommended that Rizaxus be taken while pregnant as its safety has not been established in pregnant women. Speak with your healthcare provider about the best treatment for your migraines while pregnant.

Can I take Rizaxus while breastfeeding?

It is not recommended that Rizaxus be taken while breastfeeding as its safety has not been established in breastfeeding women. Speak with your healthcare provider about the best treatment for your migraines while breastfeeding.

Is Rizaxus covered by my insurance?

The coverage of Rizaxus by your insurance policy will depend on your individual coverage. It is recommended that you contact your insurance provider to determine if your prescription will be covered.

Can I take Rizaxus with other medications?

It is generally recommended that you do not take Rizaxus with other medications without speaking to your healthcare provider first. This is especially true if you are taking medications that affect serotonin levels in the body, such as antidepressants.

Does Rizaxus interact with any foods or alcohol?

Rizaxus may interact with certain foods or beverages, such as alcohol, caffeinated drinks, and certain types of cheese. It is generally recommended that you avoid consuming these foods or drinks while taking Rizaxus.

What should I do if I miss a dose of Rizaxus?

If you miss a dose of Rizaxus, take it as soon as you remember. Do not take a double dose to make up for the missed dose. Contact your healthcare provider if you think you need a different dosing schedule.

Can I take Rizaxus daily?

Rizaxus is not intended to be taken on a daily basis. If you are having daily migraine headaches, contact your healthcare provider to discuss other treatment options.

Does Rizaxus expire?

Yes, Rizaxus tablets and orally disintegrating tablets do have an expiration date. Always check the expiration date on the package and do not use the medication if it is expired.

Can I take Rizaxus with acetaminophen?

It is generally not recommended that you take Rizaxus with acetaminophen. Speak with your healthcare provider to determine if it is safe for you to take both medications together.

Can I take Rizaxus if I have kidney disease?

If you have kidney disease, it is recommended that you speak with your healthcare provider before taking Rizaxus. Your healthcare provider may adjust the dosage or frequency of the medication depending on the severity of your kidney disease.

What should I do if I overdose on Rizaxus?

If you think you may have overdosed on Rizaxus, it is important to seek medical attention immediately. Signs of an overdose may include seizures, loss of consciousness, difficulty breathing, chest pain, irregular heartbeat, or confusion.

Can I take Rizaxus while taking other migraine treatments?

It is generally recommended that Rizaxus should not be taken with other migraine treatments such as triptans, opioids, or other ergots. If you need to take other medications for your migraines, speak to your healthcare provider to ensure it is safe to do so.

Is Rizaxus habit forming?

No, Rizaxus is not habit forming. However, if you do need to take the medication often, speak with your healthcare provider to ensure it is appropriate for your condition.

Can Rizaxus be cut or split?

Rizaxus tablets should not be split, chewed, or crushed. If you have difficulty swallowing the tablets, you may take the orally disintegrating tablets, which dissolve on the tongue.

Who should not take Rizaxus?

Rizaxus should not be taken if you are allergic to it or have experienced a reaction to taking triptans. It should also not be taken if you are currently taking monoamine oxidase inhibitors or if you have heart disease, stroke, or circulation problems.

Can Rizaxus be used to treat cluster headaches?

No, Rizaxus is not proven to be effective in treating cluster headaches. Speak to your healthcare provider about other treatment options for cluster headaches.

How should Rizaxus be stored?

Rizaxus should be stored at room temperature, away from direct light and moisture. Do not store it in the bathroom or near any heat sources. Make sure to keep it out of the reach of children and pets.

Can I take Rizaxus if I have high blood pressure?

If you have high blood pressure, it is recommended that you speak to your healthcare provider before taking Rizaxus. Your healthcare provider may determine that taking Rizaxus is appropriate for you.

Can I take Rizaxus if I am taking birth control?

Yes, it is generally safe to take Rizaxus if you are taking birth control medication. However, it is recommended that you speak to your healthcare provider just to make sure.

Can I take Rizaxus if I have a history of stroke?

No, you should not take Rizaxus if you have had a stroke or if you have circulation problems. Speak with your healthcare provider about other treatment options.

Can Rizaxus be used to prevent migraines?

No, Rizaxus is not indicated for the prevention of migraines. Speak with your healthcare provider to discuss other preventive treatment options.

Can I take Rizaxus if I am over 65?

Yes, it is generally safe for those over 65 to take Rizaxus. However, it is always recommended that you speak to your healthcare provider before taking any medication.

Does Rizaxus have any drug interactions?

Yes, there are several medications that can interact with Rizaxus. These include serotonin antagonists, monoamine oxidase inhibitors, medications that affect serotonin levels in the body, and isocarboxazid. It is important to speak with your healthcare provider or pharmacist to make sure it is safe to take Rizaxus while taking other medications.

What should I know before taking Rizaxus?

Before taking Rizaxus, it is important to discuss your medical history with your healthcare provider. Make sure to let them know about any other medications you are taking, any allergies you have, and any other medical or mental health conditions you have.

Is Rizaxus available in generic form?

Yes, Rizaxus is available in generic form. It is important to let your healthcare provider know that you would prefer the generic version of the medication and make sure to confirm the dosage and quantity before leaving the pharmacy.

What should I do if I experience side effects from Rizaxus?

If you experience side effects from Rizaxus, speak to your healthcare provider immediately. They may be able to adjust the dosage or frequency of the medication, or offer alternative treatment options.

Can I take Rizaxus while taking warfarin?

Yes, it is generally safe to take Rizaxus while taking warfarin. However, it is important to speak to your healthcare provider or pharmacist to make sure that it is safe to do so.

Does Rizaxus cause weight gain?

Weight gain is not a known side effect of Rizaxus. However, if you do experience sudden and unexplained weight gain while taking Rizaxus, contact your healthcare provider.

What is the recommended dosage of Rizaxus?

The recommended dosage of Rizaxus for adults is 5 or 10 mg, taken as soon as the headache symptoms begin. Do not exceed the recommended dosage and do not take more than 30 mg in a 24 hour period.

Does Rizaxus have any effect on fertility?

There is currently no evidence that Rizaxus affects fertility in either men or women. However, if you are nursing, pregnant, or planning to become pregnant, speak to your healthcare provider about the potential risks of taking Rizaxus.

Is Rizaxus approved by the FDA?

Yes, Rizaxus is approved for use by the US Food and Drug Administration (FDA).

Does Rizaxus cause constipation?

Constipation is not a common side effect of Rizaxus. However, if you experience constipation while taking Rizaxus, contact your healthcare provider.

Can I take Rizaxus if I have liver disease?

If you have liver disease, it is recommended that you speak to your healthcare provider before taking Rizaxus. Your healthcare provider may adjust the dosage or frequency of the medication depending on the severity of your liver disease.

Does Rizaxus cause drowsiness?

Yes, drowsiness is a common side effect of Rizaxus. It is important to be aware of this side effect before taking the medication and before performing any tasks that might require alertness, such as driving or operating heavy machinery.