150 mcg/kg is the onchocerciasis hold
One hundred fifty mcg per kg is the labeled onchocerciasis target - the number this title locks - not a slogan you can paste onto every worm. A 70 kg adult at 150 mcg/kg needs 10.5 mg, which is not a pretty blister habit. You round with a prescriber and the 3 mg chip chart, not with a leftover bottle from a cousin.
Mass programs often repeat yearly. Individual retreats can be as short as 3 months. That clock is adult Onchocerca still shedding, not a refill coupon. If your map includes Loa loa country, the hold is 'screen first,' not 'order first.'
DailyMed's Stromectol insert is the source table, not a blog chart: STROMECTOL on DailyMed. Elena's desk copies the micrograms, then asks whether you are even on this row. Which worms earn oral ivermectin 3 mg is the naming page.
150 mcg/kg is also easy to under-count if someone rounds a 70 kg adult down to 'three chips' because three is a tidy number. Three 3 mg chips is 9 mg. That is a 60 kg onchocerciasis-shaped pile, not a 70 kg one. Tidy is how people miss larvae and then blame the molecule.
Why 200 mcg/kg sits on a different row
Strongyloidiasis sits on a different labeled target: about 200 mcg/kg as a single oral dose, still Stromectol 3 mg chips, still empty stomach with water. Mixing the two numbers is the most common home-arithmetic error I see in mail. River blindness is 150. Gut Strongyloides is 200. Same tablet. Different mcg/kg.
In general the insert does not want a second Strongyloides dose up front. It wants follow-up stool to prove eradication. People who 'order extra in case' are writing an overdose plan, not a thorough one. Hyperinfection under immunosuppression is the exception that belongs in a hospital conversation, not in a bathroom tally.
If a website sells one blister strength and one story, it is not doing this math. The ivermectin vital keeps both mcg/kg rows visible for that reason.
People also collapse the rows because both use Stromectol 3 mg chips. Same object. Different micrograms. Write the indication on the paper next to the count so a later refill does not copy last year's Strongyloides pile onto this year's onchocerciasis visit.
Tablet math for a Stromectol 3 mg chip
| Onchocerciasis weight | 150 mcg/kg as 3 mg chips |
|---|---|
| 15-25 kg | 1 chip |
| 26-44 kg | 2 chips |
| 45-64 kg | 3 chips |
| 65-84 kg | 4 chips |
| 85 kg and over | calculate 150 mcg/kg |
Each Stromectol chip is 3 mg. The insert turns kilograms into a chip count so nobody invents a liquid from a paste. Onchocerciasis 150 mcg/kg uses one set of weight bands. Strongyloides 200 mcg/kg uses another. A 40 kg traveler is not 'the same as my 80 kg spouse, just fewer days.'
Under 15 kg, US tablet safety and effectiveness are not established. That is a hard floor, not a half-chip puzzle. Pregnancy is 'do not use, safety not established' on the same insert. Those are holds, not fine print.
Veterinary paste has no 3 mg chip table. That is why it does not belong in this arithmetic. If the only 'dose' you can state is a ribbon on a tongue, you are not on a human chart.
Write the equation once on paper: kg times 150 or 200 mcg, divide by 1000, divide by 3. Circle the indication before you circle the chip total. If the paper and the clinic note disagree, the clinic note wins. This page is a teaching blotter, not a second prescription.
Fasting is dose, not courtesy
Empty stomach with water is how the 150 mcg/kg and 200 mcg/kg numbers were meant to be swallowed. A high-fat meal with a 30 mg volunteer dose raised bioavailability about 2.5-fold versus fasted. That is not a rounding error. That is a different regimen wearing the same chip count.
Peak after a 12 mg fasted volunteer dose landed around 4 hours, with Cmax scattered from the teens to about 100 ng/mL depending on the study. Wide range. Food makes it wider. If you already ate, do not add chips at bedtime to 'make up absorption.' Call the person who wrote the count.
Coffee with a splash of milk is not the 48.6 g fat meal in that study. A diner breakfast is closer. When in doubt, wait. The organism will still be there in the morning. A doubled AUC might not be kind to P-gp. More on that collision at food and P-gp before cheap ivermectin 3 mg.
Travel days wreck fasting. Airport eggs, a greasy gate sandwich, then a 'I have to take it now' swallow is how a correct 150 mcg/kg becomes a food-boosted experiment. Move the dose to a hotel morning with water. The river will not vanish overnight. Your pump would like the courtesy.
Hepatic clearance vs a kidney story
Hepatic CYP3A4 clears most of an oral 3 mg regimen. Feces carry the drug and metabolites for days. Urine sees less than 1%. A CrCl speech copied from an antibiotic card does not belong here. Liver disease and strong CYP3A4 modulators do.
Elena still wants a full medication list, because P-gp sits beside CYP3A4 and can move brain exposure even when the liver story looks tidy. The P-gp hold on a Stromectol 3 mg chip is the companion vital.
Do not 'renal-dose' this tablet from a forum. And do not assume a transplant or hepatitis history is irrelevant because the insert talks about stool, not creatinine.
Biliary obstruction and advanced cirrhosis are the liver stories Elena wants named out loud. A mildly high ALT on a yearly panel is not the same hold. Still bring the number. A quiet 'my liver is fine' after three drinks a night is not a number.
Repeat clocks: hatch, nodule, hyperinfection
Repeat clocks follow the parasite, not a weekly vitamin habit. Scabies eggs hatch on a 1 to 2 week clock, so a second off-label 200 mcg/kg can be planned. Onchocerca adults shed on a months-to-years clock, so 150 mcg/kg returns on a calendar. Strongyloides in an ordinary gut often wants proof of clearance, not an automatic second swallow.
Hyperinfection is the ugly clock: autoinfection in a suppressed host, sometimes a longer or repeated plan under direct care. Copying that plan onto an immunocompetent traveler is how people overdose a simple stool.
If someone offers you a standing monthly 3 mg subscription, ask which organism lives a monthly life. Most of the labeled ones do not.
Weight floors, pregnancy, and the scale you use
Safety below 15 kg has not been established for these tablets. Guessing a half chip for a toddler is not a pediatric regimen. Pregnancy: the insert says do not use, because human data are not adequate, even though animal teratogenicity appeared at or near maternotoxic doses.
Use a current kilogram number, not last year's driver's license. Adipose changes the count. So does a hospital scale versus a bathroom brag. Elena would rather delay a mail-order impulse than sign a count built on a lie.
Pediatric data that do exist for onchocerciasis start at ages and weights already on the chart - an open study in 6 to 13 year olds, 17 to 41 kg, is not a license to dose a 10 kg infant. Bring the actual weight to a clinician who treats children.
Lactation questions belong to the prescriber who can see the infant's age and the indication's urgency. Do not crowd-source a pumping schedule from a cart comment. The 3 mg chip is still a systemic exposure. Milk is not a trivia footnote you skip because the title mentioned 150 mcg/kg.
What order Stromectol 3 mg still cannot skip
Ordering a 3 mg strip still cannot skip the organism, the mcg/kg row, the empty stomach, and the pump-drug list. 'Order' in a search bar is not a prescription. This desk has no cart. A clinician who has seen you writes the number of chips.
Cheap is not a dose. A low price on the correct 150 mcg/kg or 200 mcg/kg count is a shopping fact. A low price on a random bottle is how people import the wrong strength and invent their own bands.
If the swallow already happened and the math feels wrong, do not correct it with a second amateur count. Watch for the Mazzotti versus overdose split and get live care for ataxia, confusion, or seizures. Teaching notes do not replace an emergency department.
A pharmacy that asks only for a credit card is not completing the 150 mcg/kg job. Bring kilograms to the window anyway. If they will not hear the number, the fill is a bottle, not a dose. Elena signs teaching. Your prescriber signs the count.
Reader consultation
Your questions, answered by Dr. Elena Whitcombe, PharmD
Clinical pharmacology and infectious disease
Dose mail is kilogram mail. If you cannot state mcg/kg and a fasted plan, you are not ready to order Stromectol 3 mg. These names are editorial.
Astrid M., 42, asks: The title says 150 mcg per kg. My clinic wrote 200. Who is wrong?
Neither, if the organisms differ. 150 mcg/kg is the onchocerciasis hold this page locks for search. Strongyloides is about 200 mcg/kg. Same 3 mg chips. Different row.
Ask the clinic which species they are treating. If they cannot name it, the micrograms are a guess. I will not pick a number over a missing name.
Devon Q., 58, asks: I weigh 92 kg. How many Stromectol 3 mg chips is that?
For onchocerciasis, 150 mcg/kg is 13.8 mg - not a tidy chip multiple - so a prescriber uses the insert's '85 kg and over, calculate' line. For Strongyloides, 200 mcg/kg is 18.4 mg. Those are different piles.
I will not finalize your count from a website. I will tell you that 'about six' is a Strongyloides-shaped guess, not an Onchocerca-shaped one. Bring the scale printout.
Noor E., 35, asks: Can I split a 3 mg chip for my 12 kg child?
US tablet labeling has not established safety and effectiveness under 15 kg. Splitting a chip is not a pediatric study. Do not invent a half.
A pediatric infectious-disease clinician may have a different formulation or a different drug. That conversation is live. This page will not give you a kitchen-knife plan.
Felix R., 47, asks: I ate eggs and toast. Do I still take the 150 mcg/kg count this morning?
The label wants empty stomach with water. Eggs and toast are food. I would rather you wait than wear a food-boosted AUC on a count that assumed fasting.
Do not add an extra chip this afternoon to 'cover the breakfast.' Two wrong exposures are not a labeled 150 mcg/kg. Call the prescriber if the timing window is tight for a procedure or a travel date.
Camila S., 30, asks: I am trying to conceive. Is a single 3 mg chip still 'just one dose'?
The insert says ivermectin should not be used in pregnancy because safety is not established. 'Just one dose' is still a fetal-exposure question you do not get to shrug off on a blog.
Talk to the clinician who would treat the parasite. Untreated Strongyloides has its own risks. So does an unplanned exposure. I will not pick that trade from here.
Hugh B., 64, asks: My eGFR is 40. Do I cut the 3 mg chips in half?
Urine carries less than 1% of the dose. Kidney numbers are the wrong lever. Liver disease and pump drugs are the right ones.
Do not half-dose from a creatinine habit you learned on another drug. Bring the full list. If someone already cut your chips, tell the prescriber so the mcg/kg is honest.
Irene Y., 39, asks: The scabies plan said two doses. Is that 150 mcg/kg twice?
Off-label scabies usually uses the 200 mcg/kg neighborhood, then a second weight-scaled swallow when eggs hatch - about 1 to 2 weeks, not a next-morning double.
150 mcg/kg is the onchocerciasis hold. Do not borrow it for mites because this title mentioned it. Ask the person who diagnosed the mites to write both dates and both counts.
Pavel K., 51, asks: A site will let me order Stromectol 3 mg without asking my weight. Is that fine if I do the math?
A cart that skips kilograms is not doing the labeled job. Your home math can still pick the wrong row - 150 versus 200 - or skip Loa loa and fasting.
I do not bless a checkout. I tell you the insert's job is organism plus mcg/kg plus empty stomach. If a site will not ask those, it is selling a bottle, not a dose.
Tess G., 28, asks: I already took four chips. I think I needed five. Should I take the fifth tonight?
Do not complete a guessed count after the fact. You may already be at or above the labeled AUC, especially if food was involved.
Write down the time, the food, and your kilograms. Call the prescriber or urgent care if you feel unsteady. A late fifth chip is how a miss becomes an overdose chart.
General education from a clinician, not personal medical advice. Bring your own history to your own prescriber.