Ivermectin: Uses, Side Effects, Precautions and Dosage
Ivermectin
What is Ivermectin?
Ivermectin belongs to a class of medications called anthelmintics. Scientists isolated this compound from the bacterium Streptomyces avermitilis found in soil. The drug exhibits lipophilic properties and has an affinity for fat-rich environments in the body. Depending on the condition you need to treat ivermectin is available in oral tablet form and topical preparations.
How Does Ivermectin Work?
Ivermectin targets glutamate-gated chloride channels in parasites' nerve and muscle cells. Ivermectin opens these channels and disrupts the parasite's central nervous system function. This action causes paralysis and eventual death of the invaders. The drug does not cross the blood-brain barrier in humans due to P-glycoprotein protection. Toxicity remains low at standard doses
Uses of Ivermectin
FDA approved ivermectin for two main parasitic infections:
Strongyloidiasis: Roundworm infection affecting the intestines, often acquired through contaminated soil contact
Onchocerciasis: River blindness spread through blackfly bites that cause vision problems and skin issues
Physicians prescribe ivermectin for scabies, head lice, and other parasitic conditions as well.
How & When to Take Ivermectin
Swallow ivermectin tablets with a full glass of water do not crush or chew the tablet.
Take the medicine on an empty stomach, at least one hour before meals.
The treatment involves a single dose. Onchocerciasis may require additional doses at 3, 6, or 12-month intervals.
Dosage calculations depend on body weight.
Side Effects of Ivermectin
Common reactions include:
Dizziness
Nausea
Diarrhoea.
Patients treating for river blindness may experience joint pain, swollen lymph nodes, and fever during the first four days.
Serious effects are:
Neck or back pain
Fast heartbeat
Confusion
Seizures
Vision changes.
Allergic reactions (rare) like rash, facial swelling, or breathing difficulty.
Dosage for Ivermectin
Doctors calculate tablet dosages based on patient weight.
For strongyloidiasis: 200 micrograms per kilogram
For onchocerciasis: 150 micrograms per kilogram.
Someone weighing 65 to 84 kilogrammes receives four 3-milligram tablets as a single dose.
Can I Take Ivermectin Regularly?
Most infections need just one dose. Immunocompromised patients may require repeated courses every two weeks or monthly suppressive therapy. Onchocerciasis treatment sometimes repeats every three to twelve months.
Precautions
Patients with liver disease need careful monitoring since ivermectin undergoes extensive hepatic metabolism.
The medication remains unapproved for children weighing less than 15 kilograms and pregnant women.
People with asthma or previous allergic reactions should inform their doctor before starting this ivermectin.
Tell your doctor about all medicines and herbal supplements you are taking.
What If You Miss a Dose?
Take the forgotten dose upon remembering. But skip it if your next scheduled dose approaches. Never double up to compensate.
What If You Overdose?
Contact your doctor or emergency services if you experience any of the overdose symptoms. Toxicity symptoms include:
Confusion
Altered mental status
Seizures
Coordination problems
Hypotension
Caution With Other Drugs: Interactions
Ivermectin interacts with many drugs. Some of these are:
Anticonvulsants like phenytoin, phenobarbital, or carbamazepine
Certain antifungals like ketoconazole
Diltiazem
Erythromycin
Warfarin.
Ivermectin vs Albendazole
Ivermectin and albendazole are both antiparasitic medicines, but they work differently. Ivermectin works by paralysing parasites allowing the body to get rid of them. Albendazole stops parasites from absorbing nutrients. Ivermectin is commonly used for strongyloidiasis, onchocerciasis, and scabies. On the other hand, albendazole is used for intestinal worm infections such as roundworms, hookworms, and tapeworms.
Albendazole is often taken for several days but ivermectin is often a one-time dose. A doctor should advise on which medicine to use, as this depends on the type of infection, how severe it is, and the patient's condition.
FAQs
What is ivermectin used for?
Physicians prescribe this antiparasitic medication to curb infections caused by roundworms and external parasites. The medication comes as oral tablets, topical cream and lotion formulations.
Which parasitic infections does ivermectin treat?
The drug addresses strongyloidiasis affecting the intestines and onchocerciasis that causes eye or skin problems. Doctors also recommend it for ascariasis, trichuriasis, lymphatic filariasis, scabies and head lice. It proves effective against cutaneous larva migrans and certain mite infestations.
What is the recommended dosage of ivermectin?
Treatment involves 150 micrograms per kilogram for river blindness, repeated every three to twelve months. Threadworm infections require a single 200 microgram/kg dose. Each tablet contains 3 milligrams of the active ingredient.
How should ivermectin be taken for best results?
Take tablets on an empty stomach at least one hour before meals or two hours after eating. Swallow the whole tablet with water.
What are the common side effects of ivermectin?
Common complications are:
Diarrhoea
Nausea
Dizziness
Swelling of arms, legs, or face
Headache
Muscle pain
Joint discomfort
Can ivermectin cause serious side effects?
Severe complications include:
Neurological problems such as confusion or sleepiness
Vision loss
Serious skin reactions like Stevens-Johnson syndrome
Liver damage.
Who should avoid taking ivermectin?
Certain people face higher risks with ivermectin. They are:
People with a known allergy to ivermectin or its ingredients.
Pregnant women
Breastfeeding mothers
People with liver disease require extra caution
People with Stevens-Johnson syndrome or severe skin reactions.
Can ivermectin be used in children or elderly patients?
Children weighing less than 15 kilograms lack safety data. Although recent trials show promise. Elderly patients face increased monitoring needs due to age-related liver, kidney or heart conditions. But studies demonstrate these individuals can take ivermectin with appropriate medical supervision.
Does ivermectin interact with other medicines?
This medication interacts with many drugs. Blood thinners like warfarin create bleeding risks in combination with ivermectin. Tell your doctor about every medication, supplement and herbal product you consume.
When should I stop ivermectin and see a doctor?
Contact a doctor if you develop:
Reddish patches or skin peeling
Mouth ulcers,
Difficulty breathing
Sudden fever
Neurological symptoms including confusion or seizures
Neck pain
Vision problems.
