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Fact Table
| Fact Table | |
|---|---|
| Formula | C17H16F6N2O |
| License | US DailyMed |
| Bioavailability | over 85% |
| Legal status | Rx-Only |
| Chemical Name | Mefloquine |
| Elimination half-life | 2 to 4 weeks |
| Dosage (Strength) | 250mg |
| Pregnancy | Consult Doctor |
| Brands | Lariam |
| Protein binding | over 98% |
| PubChem CID | 40692 |
| MedlinePlus | a603030 |
| ChEBI | Not Assigned |
| ATC code | P01BC02 |
| DrugBank | DB00358 |
| KEGG | D04895 |
| Routes of administration | By mouth |
Lariam (Mefloquine) is a medication used for the prevention and treatment of malaria. It belongs to the class of drugs called antimalarials and works by killing the malaria parasites in the body. Lariam is commonly prescribed for individuals traveling to regions with chloroquine-resistant malaria. Malaria is widespread in areas such as Africa, South America, and Southern Asia.
What is Malaria?
Malaria is an infectious disease that can be life-threatening, caused by a parasite that is transmitted to humans through mosquito bites. It is characterized by symptoms such as fever, chills, sweats, fatigue, and body aches. Prompt diagnosis and treatment are essential to prevent complications and severe illness.
Directions
Take Lariam 250mg after a main meal with a full glass of water.
If you have difficulty swallowing the tablet, you can crush it and mix it with a small glass of milk, water, or another beverage.
If you vomit within 30 minutes after taking Lariam, take a full dose again. If vomiting occurs 30 to 60 minutes after taking the medicine, take a half dose. Contact your doctor if the vomiting continues.
When using Lariam for malaria prevention:
Take the medication once weekly.
Start taking it 1 to 3 weeks prior to entering a malaria-endemic region.
Maintain weekly dosing throughout your stay and for at least 4 weeks after leaving the area.
Administer the weekly dose on the same day each week.
If you discontinue Lariam before the recommended duration, seek advice from a healthcare professional regarding alternative methods of malaria prevention.
If using Lariam to treat malaria:
Follow the instructions provided by your doctor.
Ingredients
The active ingredient in Lariam is Mefloquine.
Cautions
Before using this medication, disclose your medical history to your doctor.
Mefloquine may cause dizziness or unsteadiness Avoid driving, operating machinery, or engaging in activities that require alertness until you can do so safely.
Mefloquine may reduce the efficacy of live bacterial vaccines.
During pregnancy, use this medication only if necessary.
Mefloquine can pass into breast milk. Consult your doctor before breastfeeding.
Interactions
Lariam for malaria may have a negative drug interaction with artemether-lumefantrine, atenolol, propranolol, chloroquine, halofantrine, ketoconazole, quinidine, quinine, phenytoin, valproic acid, ziprasidone.
Side Effects
The most common side effects of Lariam are stomach discomfort, reduced desire to eat, feeling nauseous, throwing up, having a headache, muscle soreness, or diarrhea. Make sure to talk to your doctor about these symptoms and discuss your dosage before you buy Lariam.
Frequently Asked Questions about Lariam
How long do Lariam side effects last?
Lariam can have temporary side effects like nausea, dizziness, headache, insomnia, vivid dreams, anxiety, and mood changes. In rare cases, some people may experience persistent side effects known as "post-mefloquine syndrome" or "mefloquine toxicity." These can include neuropsychiatric symptoms that may last for weeks, months, or longer.
How to take Lariam?
Take Lariam with food to reduce stomach upset. Take the full prescribed dose once a week, starting one to two weeks before entering a malaria-prone area. Choose a specific day each week to take it consistently. Take the tablet as a whole with water, refraining from crushing or chewing it. Continue taking Lariam throughout your stay in the malaria-prone area and for the recommended time after leaving.
Is Lariam still prescribed?
Yes, Lariam is still prescribed in certain cases when other antimalarial medications are not suitable or available. Talk to a healthcare professional to determine the best option for you.
How does mefloquine affect the brain?
Mefloquine, the active ingredient in Lariam, can affect the brain by potentially causing neurological and psychiatric symptoms. It may alter serotonin levels, leading to mood changes, anxiety, depression, and hallucinations. In rare cases, some people may experience long-lasting cognitive and balance problems.
How long can you take Lariam for?
It is advised to take one Lariam tablet every week on a consistent day while in a malaria-prone area. This routine should continue for four weeks even after leaving the area. If it is not possible for you to begin taking Lariam one week prior to entering the malaria zone, your doctor might offer alternative instructions for dosage.
