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What are the side effects associated with taking mefloquine?

Serious side effects that may result from taking mefloquine include: severe psychological side effects, such as hallucinations, anxiety, paranoia, depression, restlessness, suicidal thoughts, psychotic behavior and confusion. Neurological side effects like dizziness, vertigo, tinnitus, loss of balance, seizures and insomnia can also occur. Contact your doctor right away if you experience any of these psychological or neurological symptoms.

The doctor should also be consulted if any of the following side effects occur: mouth sores, jaundice (yellowing of the skin or eyes), easy bruising or bleeding, irregular heartbeat, dark urine, clay-colored stools, fatigue, weight loss or an allergic reaction (hives, cough or wheezing, shortness of breath, difficulty breathing, closing of the throat or a swollen tongue, face or lips). Other less serious side effects include: strange dreams, stomach pain, chills, itching, rash, headaches or weakness. Some of the less serious side effects of mefloquine, such as drowsiness or blurred vision, may impair your ability to drive or engage in other activities that require you to be alert. The doctor  also should be consulted if any of the following symptoms are severe or persistant: fever, vomiting, diarrhea, nausea, loss of appetite or muscle aches. Long-term use of mefloquine may damage the eyes or liver.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.