Summary and background and main uses
Ivermectin is an anthelmintic medication marketed under brand names such as Stromectol and as generic tablets. It treats specific parasitic infections in humans and is not effective against bacterial illnesses. In the United States the FDA has cleared oral ivermectin for intestinal strongyloidiasis and for onchocerciasis, also known as river blindness.
Clinicians sometimes prescribe ivermectin for other parasitic problems off-label when clinical judgment and available evidence support such use, for example in certain scabies or lice cases. The sections below describe common formulations, administration tips, and when to consult a health care professional. Similar topics Forms and strengths available in the United States and How to take a bite and administration advice.
Varieties and capabilities available in the United States
For human therapy the principal form in the United States is the oral tablet. Strengths differ by manufacturer; a 3 mg tablet is frequently dispensed, while 6 mg and tablets of 12 milligrams may be sold by some manufacturers or wholesalers.
- Oral tablets - tablets with a 3 mg dose are common in U.S. dispensing
- Oral tablets - some sources supply 6 mg and 12 mg strengths
Dosage is usually calculated by body weight and by the type of parasitic infection. Some regimens consist of a single dose, others require repeated dosing at specified intervals. Follow the exact dosing protocol guidelines your prescriber provides. Practical directions are in How to take action and administration advice.
How to take with care and administration advice
- Most prescribers recommend taking ivermectin on an empty stomach unless directed otherwise: typically at least 30 minutes before a meal or about 2 hours after eating.
- Swallow the tablets intact with a full glass of water. Do not chew or crush tablets unless the prescriber instructs you to do so.
- If you are given more than one dose, try to take doses at the same time of day for consistency.
- Do not increase the prescribed frequency. Complete the full course even if symptoms improve early, unless told otherwise by your clinician.
In the event of a suspected overdosed on medication, contact Poison Control at 1-800-222-1222 or move to the nearest emergency department. In event of a i did not take the dose, see the label to steer you in the right direction. Steps to take after missing a dose. For a mutual exchange of ideas questions see Drug and supplement interacting as a shared activity guidance. For keeping and waste disposal recommendations see Storing and disposing of items.
Pre treatment checklist
Before you begin the process therapy with ivermectin, make sure your prescriber knows about:
- Any allergy to ivermectin or any ingredient in the tablet, or prior severe allergic reactions
- Chronic liver disease or recent abnormal liver tests
- Current pregnancy, plans to become pregnant, or breastfeeding
- Significant respiratory disease such as asthma or other breathing problems
- Travel history to regions where Loa loa (African eye worm) is endemic, or history of heavy parasitic burden
Pediatric dosing requires assessment by a clinician experienced in treating children; doses are adjusted by weight.
Medication people engage through a series of communication in actions. with herbal and dietary supplements
A number of medicines and herbal products can change ivermectin blood levels or raise the likelihood of deleterious health effects. Examples include:
- Strong CYP3A4 or P-glycoprotein inhibitors such as ketoconazole, itraconazole, clarithromycin, and verapamil
- Anticoagulants including warfarin are used to curb clot formation. - additional INR performance monitoring may be necessary
- Strong enzyme inducers that may reduce ivermectin exposure, for example rifampin, carbamazepine, and phenytoin
- Herbal supplements and some foods that alter CYP3A4 or P-gp activity, for example St. Johns wort or grapefruit juice
This collection is not exhaustive. Always provide your prescriber or pharmacist with a complete list of prescription medicines, over-the-counter drugs, vitamins, and supplements, and mention alcohol or recreational drug use. See Heads up and incidental effects for possible adverse events.
Missing a dose: what you should know
If you forget a scheduled dose, take it as soon as you recall unless the next dose is imminent. If the next dose time is near, skip the one dose was skipped and continue your normal schedule. Do not take two doses together to compensate for a one dose was skipped.
Follow up, keeping track of metrics, and hygiene recommendations
Your health care provider may arrange follow up visits or laboratory tests to confirm infection clearance and to decide if more treatment is needed. Contact your provider if symptoms persist, recur, or worsen after therapy.
To reduce the chance of transmission or re infection, consider these hygiene steps:
- Launder bed linens and underwear regularly during active treatment, using the warmest suitable setting.
- Wash hands often and clean under fingernails.
- Disinfect commonly touched surfaces and shared bathroom fixtures.
- Follow advice on treating close contacts if your clinician recommends household treatment for scabies or similar conditions.
For signs that require immediate attention see Serious and urgent effects. For milder but common problems see Typical minor adverse reactions.
Environmental warnings and after effects
Serious and urgent effects
- Severe allergic reactions including widespread rash, hives, or swelling of the face, lips, tongue, or throat
- Breathing difficulty, chest pain, or abnormal heart rhythms
- Eye changes such as new pain, redness, swelling, or visual disturbances
- Serious neurologic events: marked confusion, fainting, severe dizziness, or new seizures
- High fever or severe skin reactions including blistering or peeling
- Sudden profound weakness, unusual swelling, or loss of bowel or bladder control
Seek immediate emergency care if you experience any of the above. For less severe but concerning symptoms, contact your prescriber promptly.
Typical mild symptoms
- Cranial pain
- Nausea, vomiting, or decreased appetite
- Stomach discomfort, constipation, or diarrhea
- Muscle aches or joint pain
- Tremor
- Tender or swollen lymph nodes in the neck, armpits, or groin
Most mild effects resolve on their own. If an effect becomes persistent or troublesome, notify your health care professional. For emergency symptoms see Serious and urgent effects.
Storage area network and disposal management
- Place medications where neither children nor pets can reach them.
- Store at room temperature below 30 C (86 F), away from excessive heat, light, and moisture.
- Keep tablets in their original labeled container and close the lid after use.
- Do not use beyond the date on which it expires. Ask your pharmacist about safe disposal of leftover medicine or samples.
Choices and side by side comparisons
Choice of an another option drug depends on the infecting organism, patient factors, local resistance patterns, and availability. Common replacement agents and topical options include:
- Moxidectin - approved in the United States for onchocerciasis in patients 12 years and older; sometimes preferred for certain cases but not a universal substitute.
- The pharmacologic agent Praziquantel - used for schistosomiasis and some tapeworm infections; does not replace ivermectin for many markers that point to.
- Albendazole - a broad spectrum anthelmintic sometimes employed for strongyloidiasis; availability and cost can vary in the U.S.
- Mebendazole - treats several intestinal helminths; cost and pricing model and access differ between drugstores.
- Topical agents for ectoparasites - permethrin 5 percent cream for scabies, benzyl benzoate, or topical lice treatments such as spinosad or pyrethrins. Topical ivermectin formulations used for dermatologic conditions are not a substitute for oral therapy when systemic treatment is required.
- Pyrantel pamoate - available over the counter in the U.S. for pinworm infections; limited scope compared with ivermectin.
- Nitazoxanide - active against some protozoal infections such as Giardia; not an overall replacement for ivermectin.
Discuss therapeutic choices and their likely costs with your clinician or pharmacist. See public pricing reference at Price range in USD (approximate).
USD estimated pricing options (approx)
The prices below are approximate cash retail ranges in the United States and do not account for insurance, coupons, or assistance programs. Actual out of pocket costs vary by pharmacy, state, and available discounts.
- Generic ivermectin tablets (3 mg): often about $1 to $6 per tablet with discounts; a typical short course may cost roughly $15 to $80.
- Topical permethrin 5 percent cream (60 g tube): commonly about $15 to $60 at retail.
- Moxidectin tablets: frequently several hundred dollars out of pocket; ranges around $200 to $400 or more depending on supply.
- Albendazole (200 mg): may be expensive in the U.S.; a short course can range roughly $150 to $600 or higher.
- Mebendazole (100 mg): prices vary; courses may range from about $100 to $400 or more.
These values are for orientation only. Contact local pharmacies for current incremental pricing and ask about discount cards, generic substitute options, or manufacturer assistance programs that could lower costs.
Legal and prescribing rules in the US
- Prescription requirement: Oral human ivermectin (Stromectol and generics) must be prescribed by a licensed U.S. prescriber.
- FDA approvals: The FDA has approved ivermectin for onchocerciasis and strongyloidiasis; other uses may be prescribed off label when clinically appropriate.
- Dispensing: Approved prescriptions must be dispensed by licensed drug selling points. Mail order and online pharmacies may fill valid prescriptions in accordance with federal and state regulations.
- Veterinary products: Do not use veterinary formulations for humans. Animal products are not approved for human use and may contain different strengths or inactive ingredients.
- Importation: Importing drugs from abroad that have an approved U.S. equivalent is generally restricted. The FDA seldom permits importation when a U.S. approved product is available.
- Telehealth prescribing: Many licensed clinicians may prescribe via telehealth after appropriate evaluation, but prescribers must follow state laws and professional standards.
Keep medicines in their labeled containers and follow directions from your prescriber and pharmacist. For dosing directions see How to take on a task and administration advice.
The FAQ section
Is ivermectin categorized as an antibiotic?
No. Ivermectin is an antiparasitic agent in the anthelmintic category. It is not effective against bacteria.
Would taking ivermectin with food be advisable?
Many prescribers recommend taking ivermectin on an empty stomach because food can change absorption. Follow the directions given by your clinician or pharmacist. See How to take on a challenge and administration advice.
Could alcohol affect the action of ivermectin?
There is no general prohibition against moderate alcohol use with ivermectin in most guidelines, but alcohol can worsen dizziness or stomach upset. Discuss your individual situation with your prescriber or pharmacist. See Drug a mutual exchange of ideas guidance involving supplements.
Is it acceptable to use a veterinary product designed for animals?
No. Veterinary ivermectin preparations are formulated and labeled for animals and are not approved for human use. Strengths, purity, and excipients differ, so do not substitute animal products for prescription human medicines. See Legal and prescribing rules in the US.
Is operating a vehicle safe after ivermectin ingestion?
Some people experience dizziness or drowsiness while taking ivermectin. Avoid driving or operating heavy machinery until you know how the medicine affects you. If you develop severe neurologic symptoms, seek medical help; see Serious and urgent effects.
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