Enter the 45-64 kg band before anyone counts
Enter kilograms. Annotate the 45-64 kg band. Stamp three 3 mg chips when the oncho row applies. Close if the organism is wrong.
Kilograms decide the chip count. I do not start THL-01 with a mechanism lecture. I start with a scale and a 3 mg tablet, because that is how Stromectol is actually written. For onchocerciasis the label band 45-64 kg is three tablets. Nine milligrams. About 150 mcg/kg. Miss the band and you underdose a mid-size adult or you stack extra chips without a reason.
Adults ask for a cheap Stromectol 3 mg bottle as if the strength were the whole story. Strength is the unit. The story is how many units match the kilograms and the organism. Strongyloides is dosed near 200 mcg/kg. That is a different arithmetic on the same chip. I write both numbers in the chart so a refill clerk cannot collapse them into one folk dose.
Boston patients sometimes arrive with a screenshot of a farm-store paste. Same generic word. Wrong formulation class. Livestock syringes are graduated for hundreds of kilograms. Human 3 mg tablets are the only chips I will annotate on this line. If the organism is not a nematode, a mite, or a louse with evidence behind it, I close the line before I count.
Travel clinics still see Strongyloides decades after a person left an endemic region. Steroids can wake that autoinfection. I would rather spend five minutes on exposure history than watch a hyperinfection after a prednisone burst. That is why this opening is a weight-and-organism stamp, not a chemistry preface.
Chloride channels the host does not share
Glutamate-gated chloride channels sit in invertebrate nerve and muscle. Ivermectin opens them. The worm hyperpolarises and cannot feed or hold on. Mammalian peripheral nerves lack that channel isoform. That anatomical gap is the therapeutic window, not a marketing slogan.
Brain GABA channels sit behind a pump. P-glycoprotein keeps labeled human exposure out of the CNS. Overdose - especially paste built for a cow - can overwhelm that pump. Sedation, ataxia, tremor, coma. Those cases are why I will not 'convert' a livestock syringe into a 45-64 kg plan.
Hydrogenation of the parent avermectin made a more chemically stable human tablet with a cleaner mammalian margin than the soil isolate alone. Satoshi Omura and William Campbell's work is why the chip exists. It is not why someone should swallow paste from a tack shop.
Why this tablet is not an antiviral card
Laboratory dishes are not a 45-64 kg adult. Concentrations that looked interesting against some viruses sat far above what a fasting human 3 mg regimen can safely reach. Large randomised platform trials at ordinary human doses did not move hospitalisation or death in COVID-19 in a way that would rewrite this ledger.
I still meet people who kept a bottle 'just in case.' That cabinet habit burns trust and, when the bottle is livestock paste, it burns patients. FDA patient pages say the same limit in plainer type than a forum thread. I point to those pages and I keep the parasite indications.
Tapeworms and flukes are another hard negative. Different biochemistry. Praziquantel belongs on those rows. Stool identification before treatment is stewardship. Treating the wrong organism spends Mazzotti risk and Loa loa risk for no gain.
Soil isolate, Mectizan, then a Nobel stamp
Omura isolates Streptomyces avermitilis and shares cultures.
Ivermectin launches in animals; human 3 mg work comes later.
Mectizan donation pledge for onchocerciasis as long as needed.
Nobel Prize for the avermectin discovery - parasite work, not viruses.
Japanese soil gave Streptomyces avermitilis. Merck's team found the anthelmintic activity and hydrogenated it. Veterinary launch came first. Human river-blindness work followed. That order still explains why farm paste and human 3 mg chips share a name and must not share a syringe.
Merck's Mectizan donation in 1987 scaled mass treatment. Transmission fell in multiple regions. WHO essential-medicine lists still carry the molecule for parasite programmes. The 2015 Nobel to Omura and Campbell was for that discovery, not for a pandemic sideline.
I keep the history visible because trust belongs to the parasite record. When a patient quotes a social-media dosing card, I point back to weight bands and organisms. Programme outcomes live on the ivermectin trial ledger.
CYP3A4, warfarin, and a short mix list
- Hold or adjust: strong CYP3A4 inhibitors (ketoconazole, itraconazole, ritonavir-type boosters).
- Watch: warfarin INR in the days after a dose.
- Do not mix classes: veterinary paste, leftover 'virus' bottles, praziquantel-need organisms.
The interaction list is short and still worth a full med rec. Strong CYP3A4 inhibitors can raise ivermectin. I pause for ketoconazole, itraconazole, and some HIV boosters. Grapefruit is a smaller, messier lever; I still ask.
Warfarin INR can shift after a supervised dose. I would rather check INR a few days later than guess. One 3 mg-chip count in a 45-64 kg adult is usually quiet. Quiet is not the same as unmonitored when the person is anticoagulated.
Alcohol is not a specific labeled stop for a single fasting dose. The meal is the bigger lever. I would rather cancel the fried plate than cancel a modest glass the night before, and I say that without turning the visit into a morality play.
Fasting water and an 18-hour fade
Empty stomach with water is the labeled clock. A high-fat meal can roughly double absorption versus fasting. That is not a bonus. Label trials used the fasting exposure. I treat a greasy breakfast as a dose change I did not write.
Parent half-life sits near 18 hours. One supervised dose can carry a short course because the molecule is lipophilic and hangs in tissue. Faecal clearance dominates. Kidney impairment is usually less of a dose puzzle than a CYP3A4 inhibitor sitting on the same list.
Peak plasma is often around four hours. I do not tell people to 'feel it working' on a clock. Parasite death and host itch have their own timing. I do tell them not to chase a second handful of 3 mg chips the same night because the first dose felt quiet.
Repeat onchocerciasis visits follow adult worms, not a fading plasma curve. An 18-hour half-life explains why one fasting dose can cover a short pass. It does not retire nodules. I put the next programme date in the same sentence as the three-chip count so families do not treat THL-01 like a one-visit antibiotic.
Does a Boston ledger list Stromectol 3 mg as a cart?
| Pharmacy | Strength / count | How the window works | Official page |
|---|---|---|---|
| Albertsons | 3 mg x 16 | Grocery pharmacy cash window | Albertsons pharmacy |
| Costco | 3 mg x 16 | Warehouse cash; membership may apply | Costco pharmacy |
| H-E-B | 3 mg x 16 | Texas grocery pharmacy desk | H-E-B pharmacy |
| Walmart | 3 mg x 16 | Ordinary cash counter | Walmart pharmacy |
Cart language does not live on this desk. THL-01 is a teaching line: cheap Stromectol 3 mg as a counted chip, three tablets on a 45-64 kg oncho band, human tablets only. A grocery or warehouse window can quote a 3 mg x 16 bottle. That quote is not a checkout button here. We do not ship. We do not add to cart.
Cash figures move by ZIP and by the coupon print in someone's pocket. The table below lists four licensed counters and the 16-count card this remake locked. Nearby public GoodRx prints for other counts sit in the caption so nobody invents a dollar cell. GoodRx and SingleCare stay in that caption. They never become a row href.
If a reader wants an antibacterial neighbor after a parasite rule-out, the ledger already holds ciprofloxacin 750 mg and amoxicillin 500 mg. Those are different organisms and different holds. Do not treat a cart comparison as a diagnosis.
Strongyloides, river blindness, and mite math
Intestinal strongyloidiasis is a U.S. label row. One weight-based dose, then proof. Hyperinfection in a transplant or steroid host is an emergency pattern, not a travel anecdote. Screen before high-dose steroids when the biography includes endemic soil or childhood in the rural tropics.
Onchocerciasis dosing is the 150 mcg/kg calendar. Three 3 mg tablets on the 45-64 kg band. Repeat while adults persist. Vision and skin programmes succeeded because communities took coverage seriously, not because one bottle ended transmission.
Mites and lice sit in the evidence-backed off-label column in U.S. clinics. Households need simultaneous treatment. Asymptomatic contacts still carry mites. Wash the bedding. The tablet without the laundry is an incomplete stamp.
Antibacterial neighbors on this formulary - Cipro 750, Amoxil 500 - do not substitute when the smear is a helminth. I say that in the room because people bundle 'infection pills' into one mental drawer.
How three 3 mg chips map to kilograms
| Band (oncho ~150 mcg/kg) | Stromectol 3 mg chips | What I write |
|---|---|---|
| 15-25 kg | 1 tablet | Do not invent a half-chip |
| 26-44 kg | 2 tablets | Still a counted band |
| 45-64 kg | 3 tablets | SERP lock on this desk |
| 65-84 kg | 4 tablets | Heavier adult row |
| >=85 kg | Calculate 150 mcg/kg | No folk rounding |
Label charts exist because nobody should improvise a milligram-per-kilo scrawl on a napkin. Onchocerciasis uses about 150 mcg/kg. The 45-64 kg row is three 3 mg tablets. Lighter bands take one or two chips. Heavier bands take four, then a calculated leftover. I keep a printed chart in the room so the math is not a memory trick.
Strongyloides stercoralis is the other U.S. oral indication, near 200 mcg/kg, often a single supervised dose with a planned look-back. Autoinfection means a missed larva can restart the cycle. Many of us repeat stool exams two to four weeks later instead of declaring cure from a quieter belly. Immunocompromised hosts get a tighter calendar.
Scabies is off-label in the United States and still common in household clusters. Evidence-backed practice is about 200 mcg/kg, then a second dose one to two weeks later because eggs outlive the first pass. Crusted scabies is not a one-chip problem. It needs repeats, topical partners, and infection-control boring enough to actually do.
Children under about 15 kg sit outside established oral safety on the U.S. tablet label. I do not scale a 3 mg chip with a kitchen knife. Pediatric infectious disease or an alternative regimen belongs in that gap. Pregnancy data are thin; untreated heavy parasite burden can still outweigh unknown fetal risk, but that is a shared decision, not a standing order.
Household laundry without a counted tablet still leaves mites in the seams. I write the kilogram band on the after-visit summary so a partner who missed the visit can still count three Stromectol 3 mg chips for a 45-64 kg adult on the oncho row. Scabies math is ~200 mcg/kg and a second date on the calendar. Mixing those two rows in one kitchen is how underdosing starts.
Loa loa is the stamp that can stop the line
Central African residence or long field time is not small talk. Loa loa co-endemicity can turn a standard onchocerciasis dose into encephalopathy when microfilarial density is very high. I ask the travel question before I count three chips for a 45-64 kg adult. A blood smear is not delay. It is the hold.
Mazzotti-type reactions are a different stamp. Itch, rash, tender nodes, low fever after microfilariae die in bulk can mean the drug worked. Severity tracks load. Most of those reactions settle in a day or two. Confusion, collapse, or severe hypotension is not a Mazzotti shrug. That is acute care.
Onchocerca adults live in nodules. One supervised dose knocks down microfilariae. It does not retire the adults. Programmes therefore repeat on a calendar. Families who expect a single cheap Stromectol 3 mg visit to end river blindness need that sentence said out loud. The trial ledger keeps the programme numbers; this line keeps the stop rules.
Close the line: three chips, one organism
Close THL-01 on the count you can defend. Cheap Stromectol 3 mg is a unit. For a 45-64 kg adult on the onchocerciasis band, the unit count is three. Strongyloides near 200 mcg/kg is a different count on the same chip. Fasting water. Human tablets. No paste.
Loa loa screening can stop the line. Mazzotti itch is often expected. Antiviral claims are not on this card. CYP3A4 and warfarin still get a look. This Boston ledger does not fill a 16-count bottle; it stamps the math a licensed window will later read.
Talk with your own clinician or pharmacist before anyone starts, stops, or restacks 3 mg chips. The live FDA label still wins if this teaching line and the bottle disagree.
Talk with your own clinician or pharmacist before you change a tablet or a dose. Open the ledger disclaimer.
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