Ivermectin 3mg Tablets
Overview
What is this medicine?
How to Use This Medicine
To use this medication correctly, follow your doctor's instructions and read all the information provided. Take the medication on an empty stomach with a full glass of water. It's also important to drink plenty of non-caffeinated liquids, unless your doctor advises you to limit your fluid intake.
Storing and Disposing of Your Medication
Store your medication at room temperature in a dry location, avoiding the bathroom. This will help maintain its effectiveness and safety.
Missing a Dose
Since only one dose of this medication is required, it's essential to take it as scheduled. If you miss your dose, take it as soon as you remember.
Lifestyle & Tips
- Take Ivermectin on an empty stomach with water, unless otherwise directed by your doctor. Some sources suggest taking it with food to improve absorption and reduce stomach upset, so follow specific instructions.
- Do not drive or operate machinery if you experience dizziness or drowsiness.
- Maintain good hygiene to prevent re-infection (e.g., hand washing, proper sanitation).
Available Forms & Alternatives
Available Strengths:
Dosing & Administration
Adult Dosing
Condition-Specific Dosing:
Pediatric Dosing
Dose Adjustments
Renal Impairment:
Hepatic Impairment:
Pharmacology
Mechanism of Action
Pharmacokinetics
Absorption:
Distribution:
Elimination:
Pharmacodynamics
Safety & Warnings
Side Effects
Although rare, some people may experience severe and potentially life-threatening side effects while taking this medication. If you experience any of the following symptoms, contact your doctor or seek medical attention immediately:
Signs of an allergic reaction, such as:
+ Rash
+ Hives
+ Itching
+ Red, swollen, blistered, or peeling skin with or without fever
+ Wheezing
+ Tightness in the chest or throat
+ Trouble breathing, swallowing, or talking
+ Unusual hoarseness
+ Swelling of the mouth, face, lips, tongue, or throat
Severe dizziness or fainting
Changes in vision, eye pain, or severe eye irritation
Joint pain
Swelling
Fever
Swollen glands
Nervous system problems, which can lead to coma or death. Seek immediate medical attention if you feel:
+ Extremely sleepy
+ Sluggish
+ Confused
+ Disoriented
A rare but potentially life-threatening brain problem can occur in patients with a Loa loa infection, typically acquired in West Africa or Central Africa. If you have traveled to these regions, inform your doctor. Seek immediate medical attention if you experience:
+ Neck pain
+ Back pain
+ Red eyes
+ Eye bleeding
+ Shortness of breath
+ Seizures
+ Difficulty walking or standing
+ Confusion
+ Extreme fatigue or weakness
+ Loss of bladder or bowel control
Other Possible Side Effects
Most people do not experience significant side effects, but some may occur. If you are bothered by any of the following side effects or if they persist, contact your doctor or seek medical attention:
Itching
* Skin irritation
This is not an exhaustive list of potential side effects. If you have questions or concerns about side effects, consult your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.
Seek Immediate Medical Attention If You Experience:
- Severe dizziness or fainting
- Seizures
- Confusion or changes in mental status
- Severe skin rash or blistering
- Swelling of the face, lips, tongue, or throat (signs of allergic reaction)
- Difficulty breathing
- Eye pain or vision changes (especially in onchocerciasis patients)
- Severe or persistent nausea, vomiting, or diarrhea
Before Using This Medicine
It is essential to inform your doctor about the following:
Any allergies you have, including allergies to this medication, its components, or other substances, such as foods or drugs. Be sure to describe the symptoms you experienced.
All medications you are currently taking, including prescription and over-the-counter (OTC) drugs, natural products, and vitamins. This information will help your doctor and pharmacist assess potential interactions.
* Any existing health problems, as this medication may interact with certain conditions.
To ensure safe use, carefully review all your medications and health issues with your doctor and pharmacist. Never start, stop, or adjust the dosage of any medication without first consulting your doctor to confirm it is safe to do so.
Precautions & Cautions
To minimize the risk of dizziness or fainting, it is crucial to stand up slowly when getting up from a sitting or lying down position. Additionally, exercise caution when climbing up or down stairs.
If you are pregnant, planning to become pregnant, or are breastfeeding, it is vital to consult with your doctor. You and your doctor will need to weigh the benefits and risks of this medication to both you and your baby.
Overdose Information
Overdose Symptoms:
- Rash
- Edema
- Headache
- Dizziness
- Asthenia
- Nausea
- Vomiting
- Diarrhea
- Abdominal pain
- Seizures
- Ataxia
- Dyspnea
- Paresthesia
- Tremor
- Coma
What to Do:
Call 1-800-222-1222 (Poison Control). Supportive care, including parenteral fluids and electrolytes, respiratory support (if necessary), and measures to maintain blood pressure. Emesis and/or gastric lavage may be indicated as soon as possible following oral ingestion.
Drug Interactions
Major Interactions
Moderate Interactions
- CYP3A4 inhibitors (e.g., ketoconazole, itraconazole, clarithromycin, ritonavir, grapefruit juice) - may increase ivermectin plasma concentrations.
- CYP3A4 inducers (e.g., carbamazepine, phenytoin, rifampin, St. John's Wort) - may decrease ivermectin plasma concentrations.
Monitoring
Baseline Monitoring
Rationale: To calculate appropriate dose (mcg/kg).
Timing: Prior to administration.
Rationale: To confirm diagnosis and assess parasite burden.
Timing: Prior to treatment.
Rationale: To confirm diagnosis and assess microfilarial load.
Timing: Prior to treatment.
Routine Monitoring
Frequency: As clinically indicated, typically weeks to months post-treatment.
Target: Resolution of symptoms, negative stool exams (strongyloidiasis), reduction in microfilarial counts (onchocerciasis).
Action Threshold: Persistent symptoms or positive parasite findings may indicate need for retreatment.
Frequency: During and after treatment, especially within the first 24-48 hours.
Target: Absence or mild, tolerable side effects.
Action Threshold: Severe or persistent adverse effects warrant medical evaluation.
Symptom Monitoring
- Dizziness
- Nausea
- Diarrhea
- Headache
- Fatigue
- Abdominal pain
- Skin rash
- Pruritus
- Fever
- Myalgia
- Arthralgia
- Lymphadenopathy (especially in onchocerciasis, indicative of Mazzotti reaction)
Special Patient Groups
Pregnancy
Use during pregnancy only if the potential benefit justifies the potential risk to the fetus. Animal studies have shown teratogenicity at high doses. Limited human data suggest no increased risk of major birth defects, but data are insufficient to rule out risk.
Trimester-Specific Risks:
Lactation
Ivermectin is excreted in human milk in low concentrations. The American Academy of Pediatrics considers it compatible with breastfeeding. However, caution is advised, and the infant should be monitored for potential adverse effects.
Pediatric Use
Safety and efficacy have not been established in pediatric patients weighing less than 15 kg or under 2 years of age. Dosing for children âĨ15 kg is weight-based. Close monitoring for adverse effects is important.
Geriatric Use
No specific dose adjustment is generally required based on age alone. However, elderly patients may have reduced hepatic or renal function, or concomitant diseases, which could affect drug clearance. Use with caution and monitor for adverse effects.
Clinical Information
Clinical Pearls
- Ivermectin is highly effective against a range of parasitic infections, particularly strongyloidiasis and onchocerciasis.
- For strongyloidiasis, follow-up stool examinations are crucial to confirm eradication, as a single dose may not always be curative.
- In onchocerciasis, Ivermectin does not kill adult worms but effectively reduces microfilarial load, preventing disease progression and transmission. Retreatment is often necessary.
- The Mazzotti reaction (fever, headache, dizziness, rash, pruritus, arthralgia, myalgia, lymphadenopathy, hypotension) can occur in patients with onchocerciasis due to the death of microfilariae; it is usually mild and self-limiting but can be severe.
- Ivermectin is generally well-tolerated, with most adverse effects being mild and transient.
- While often taken on an empty stomach, some sources suggest taking it with food to improve absorption and reduce GI upset. Follow specific instructions from the prescribing physician or package insert.
- Not effective against adult worms of Onchocerca volvulus or against the adult stages of other filarial parasites.
Alternative Therapies
- Albendazole (for strongyloidiasis, hookworm, ascariasis, trichuriasis)
- Mebendazole (for hookworm, ascariasis, trichuriasis, pinworm)
- Diethylcarbamazine (DEC) (for onchocerciasis, loiasis, lymphatic filariasis - note: DEC is contraindicated in onchocerciasis due to severe Mazzotti reaction)
- Thiabendazole (for strongyloidiasis, cutaneous larva migrans)