Intro and basics
Ivermectin functions as the active ingredient.
Brand and generics: Stromectol is a commonly used brand name. Generic oral ivermectin tablets are available in the United Kingdom but require a prescription from a UK-registered prescriber.
Therapeutic class: antiparasitic medicines. Ivermectin is prescribed for conditions such as strongyloidiasis and onchocerciasis, and in selected cases for scabies (including crusted scabies) and some lice infestations.
Typical tablet strengths seen in UK practice include 3 mg, 6 mg and each tablet contains 12 mg. Dosage is weight-based and depends on the infection being treated and national guidance; some regimens are single-dose, others require repeat dosing or a combination with topical therapy.
Mechanism: ivermectin interferes with parasite nerve and muscle function by enhancing inhibitory chloride currents, leading to paralysis and death of susceptible parasites.
For administration advice see how do you correctly administer ivermectin?. For law and access to information about rightsibility details read Understanding the requirements for UK legal standing and how to obtain it..
Steps for proper ivermectin use
Basic directions:
- The tablets should be swallowed with a full glass of water. Do not crush or chew unless your clinician has advised this.
- It is usually recommended to take ivermectin on an empty stomach. Aim for at least 30 minutes before food, or wait about two hours after eating.
- If you have multiple prescribed doses, try to take them at the same time of day to preserve an even schedule.
- Avoid grapefruit and grapefruit juice near dosing times as they can increase blood concentrations of the drug.
- Follow your prescriber exactly regarding administration timing and dose. Some regimens include a repeat dose after 7 to 14 days when clinically indicated.
Minors: oral ivermectin is generally avoided in children weighing less than 15 kg unless a specialist advises otherwise. Seek paediatric or specialist input for dosing in young children.
If you vomit within an hour after taking a tablet, contact the prescriber or pharmacist to ask whether the dose should be repeated.
In suspected intentional overdose use NHS 111 for fast personal mentorship. For life-threatening signs such as severe breathing problems, new seizures or unconsciousness, call 999 or route yourself to the nearest emergency department.
If you are unsure about whether you missed a dosekindly verify. with your healthcare provider. dose was omitted action plan.
Undesired effects and when to get support
Serious reactions require urgent attention. Seek immediate medical help if you develop any of the following:
- Allergic signs such as sudden widespread rash or hives; swelling of the face, lips, tongue or throat; or difficulty breathing
- Marked changes in consciousness including fainting, new seizures, or sudden severe confusion
- Chest pain or a very fast or irregular heartbeat
- Eye problems like acute pain, redness, swelling or sudden vision changes
- High fever, severe swollen glands or a sharp deterioration that may reflect an inflammatory response to dying parasites
- Severe skin reactions with blistering or widespread peeling, including inside the mouth
Commoner, usually milder effects that should be discussed with your clinician if they persist or worsen:
- Painful head
- Nausea, vomiting or loss of appetite
- Belly ache, diarrhoea or constipation
- Muscle aches, joint pain or tremor
- Tender lymph nodes around the neck, axillae, or groin.
Note: treatment for onchocerciasis can provoke an inflammatory reaction as parasites die; this may cause itching, fever and swollen nodes and should be monitored by a clinician.
For protective steps and interacting medicines see the study maps how the mutual influence during contacts evolve over time. and required precautions. For hygiene and follow-up see watchfulness and sanitation.
Interaction dynamics and safety measures
Several drugs and certain foods can change ivermectin levels in the body or increase harmful effects. Common the back and forth between people issues include:
- Grapefruit and grapefruit juice can raise ivermectin exposure and should be avoided near dosing times.
- Strong CYP3A4 or P-glycoprotein inhibitors such as ketoconazole, ritonavir, cobicistat, clarithromycin or verapamil may increase drug concentrations.
- Enzyme inducers like rifampicin, carbamazepine, phenytoin or St John's wort can lower ivermectin levels.
- Anticoagulants that include warfarin may need observation and tracking due to potential the mutual influence during contact effects on bleeding risk.
- Alcohol solution and other central nervous system depressants may increase drowsiness or dizziness when taken with ivermectin.
The full list is not shown here. Give your prescriber a full list of prescription and non-prescription medicines, herbal remedies, vitamins and recreational drug use so effective the act of engaging in dialogues require clear communication. can be checked.
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Pre-treatment checks and warning announcements
Pre-therapy begins, tell your clinician about your complete medical history and current medicines. Important issues to discuss include:
- Known liver disease or abnormal hepatic function test results
- Neurological history such as seizures or episodes of unexplained fainting
- Chronic respiratory conditions, including severe asthma
- Pregnancy, trying to conceive, or breastfeeding
- Allergies to medicines, foods or product excipients
- History of travel to or residence in areas where Loa loa (African eye worm) is present, since coinfection can cause serious reactions
Paediatric dosing must be decided by a clinician. In general, oral ivermectin is avoided in very small children unless a specialist advises otherwise.
See how should ivermectin be consumed? for administration details and UK access and information on the legal code on obtaining treatment.
In case you skip a dose
Take a missed tablet as soon as you remember. If it is nearly time for the next scheduled dose, skip the i did not take my dose and continue the normal timetable. Do not take two doses together to make up for the missed tablet.
If you are uncertain what to do, contact the dispensing pharmacy, your prescriber, or NHS 111 for advice.
More administration information is available at how should ivermectin be consumed?.
Monitoring and evaluation, follow-up care and hygiene measures
Attend any follow-up appointments recommended by your clinician. Depending on the diagnosis, tests such as stool examination, skin inspection, or eye assessment may be required and retreatment could be considered.
To reduce transmission and reinfection consider the following steps:
- Wash bedding, clothing and towels at the hottest temperature suitable for the fabric and, where possible, tumble-dry on a hot setting.
- Seal items that cannot be laundered in a plastic bag for at least 72 hours.
- Maintain personal hygiene: shower regularly, keep nails short and clean, and wash hands frequently.
- Disinfect frequently touched surfaces and clean toilets frequently; vacuum soft furnishings.
- For scabies, household contacts may need treatment at the same time as the affected person, following clinical advice.
If symptoms continue, worsen or you develop high fever, swollen glands or eye symptoms after treatment, contact your prescriber.
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- Make sure medicines are kept out of the reach and sight of children.
- Store at normal room temperature below 30 C (86 F) in the original container with the cap closed.
- Do not use tablets after the expiry date shown on the pack. Return unused or out-of-date medicines to a pharmacy for safe disposal rather than discarding in household waste.
For other course options to oral therapy, see an alternate possibility drug options and related pharmaceuticals.
Alternate medicines and similar drugs
Choice of therapy depends on the specific parasite, the patient's age and weight, pregnancy status, local resistance and national directional support. Options commonly considered by UK clinicians include:
- Permethrin 5 percent cream for scabies; permethrin 1 percent for head lice in some products
- Dimeticone-based lotions or sprays for head lice
- Albendazole or mebendazole tablets for many intestinal helminths
- Malathion lotion for lice in selected situations
- Benzyl benzoate or crotamiton topical preparations for scabies when indicated
- Diethylcarbamazine for certain filarial infections under specialist supervision
- Moxidectin, an oral macrocyclic lactone used in some onchocerciasis programmes under specialist oversight
Oral ivermectin is often used when topical treatments are impractical, have failed, or for crusted scabies, usually with specialist involvement. Discuss pros and cons in partnership with your clinician.
See typical United Kingdom price forecasts to compare costs.
Typical UK estimated price spectrum (private purchase)
The following are rough private price levels in British pounds (GBP). Prices vary with retailer, pack size and whether the medicine is supplied on the NHS. These numbers are only indicative.
- Ivermectin tablets (Stromectol or generic) for single-dose regimens: about 12 to 45 GBP per small private pack
- Permethrin 5 percent cream (30 to 60 g): around 6 to 12 GBP
- Malathion lotion: approximately 8 to 18 GBP
- Dimeticone head lice products: typically 5 to 15 GBP
- Mebendazole or albendazole oral packs: roughly 10 to 80 GBP depending on formulation and pack size
NHS prescriptions: in England a prescription charge applies per item (check the current rate). You do not pay for prescriptions in Scotland, Wales and Northern Ireland. Confirm charges and availability with an NHS service or pharmacy.
For up-to-date competitive pricing ask a local pharmacy or double check a UK-registered online pharmacy. For more on this Procedure for obtaining Britains standing in law and its implications. for guidance on obtaining prescription medicines.
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What is the status of lawful recognition of ivermectin in the UK and how can it be obtained?
- Regulatory classification: oral ivermectin is a Prescription Only Medicine (POM) in the UK. A valid prescription from a prescriber registered in the UK is required.
- Where to obtain: supplies are available from General Pharmaceutical Council (GPhC) registered community pharmacies and NHS services. UK online pharmacies must display the MHRA distance selling logo alongside their GPhC registration number.
- Importing and ordering from abroad: importing prescription medicines for personal use is strictly regulated. Small personal imports may be allowed in narrow circumstances, but packages can be detained or return to where you wereed if they do not meet UK rules. Check MHRA guidance before purchasing from overseas.
- Advertising rules: direct-to-public promotion of prescription medicines is not permitted in the UK. Take care with websites or vendors making unverified clinical claims.
- Veterinary products: do not use animal formulations of ivermectin for human treatment. Animal products differ in formulation and dosing and may be unsafe and unlawful for human use.
- Clinical use and safety reporting: follow your prescriber's instructions. Report suspected adverse reactions via the MHRA Yellow Card scheme.
- Driving and machinery: avoid driving or operating machinery if you experience drowsiness, dizziness or visual disturbance after taking ivermectin.
- Disposal: return unused or expired medicines to a pharmacy for safe disposal rather than discarding in household waste.
For authoritative, current information consult NHS.uk, the Medicines and Healthcare products Regulatory Agency (MHRA) paired with the General Pharmaceutical Council (GPhC) websites or speak with a clinician or pharmacist.
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