Clinical reference · Milan
Five medicines.The numbers that survived a trial.
No cart, no ranking, no paid placement. Each page starts from a label dose and a named study. If a popular claim never made it into a randomized file, we say so.
Medicines
The five pages, each locked to one strength
Ivermectin stays on the 3 mg tablet and the 150 mcg/kg count. Mebendazole is the 100 mg chewable. Tadalafil is the 2.5 mg daily start. Sildenafil is 50 mg. Vardenafil is 20 mg. Other strengths appear in the body when the label lists them.
Take the 100 mg chewable once for pinworm, then take it again in 2-3 weeks
Pinworm treatment with a 100 mg chewable starts with one tablet, then a planned repeat. CDC times that second 100 mg at two weeks because the first do…
Open the profile → Antiparasitic (avermectin)Count the 3 mg tablets to 150 mcg/kg; that is the labeled onchocerciasis cut
The labeled onchocerciasis dose is a single count of 3 mg tablets to about 150 mcg/kg. In the placebo-controlled cut on the Stromectol label, that dos…
Open the profile → PDE5 inhibitorStart Cialis as 2.5 mg tadalafil every day
The Cialis label starts once-daily erectile dysfunction treatment at 2.5 mg tadalafil, taken at about the same time each day. Timing of sexual activit…
Open the profile → PDE5 inhibitorScreen QT before a 20 mg vardenafil (Levitra) tablet
The Levitra label tells clinicians to start most men at 10 mg vardenafil, taken as needed about 60 minutes before sexual activity. Twenty milligrams i…
Open the profile → PDE5 inhibitorSildenafil 50 mg works cleaner away from a fatty meal
Pfizer still lists 50 mg as the recommended sildenafil dose for most men with erectile dysfunction, taken as needed about 1 hour before sexual activit…
Open the profile →Notes
Eight longer reads that follow a single question
What 3 mg ivermectin treats, which headlines outran the file, how to take mebendazole 100 mg, which worm gets which tablet, 2.5 mg every day versus a 10 mg hit, when to take sildenafil 50 mg, how the three PDE5 pills differ, and why an erection fails.
Sildenafil 50 mg wants an hour, and a lighter meal
Most men take sildenafil 50 mg about one hour before sex. The US label also allows 30 minutes to 4 hours. That hour is the default…
Claim audit150 mcg/kg is river-blindness math. COVID claims left that file behind.
River-blindness programmes count 3 mg tablets to hit about 150 mcg per kg. That number is a larval dose on a human label. It is no…
ComparisonDuration and QT split tadalafil, sildenafil, and vardenafil 20 mg
Three approved PDE5 tablets share a nitrate ban and split on duration. Tadalafil can support a response out to 36 hours. Sildenafi…
Dosing guidePick the 2.5 mg daily start or the 10 mg on-demand tablet
The US Cialis label starts once-daily tadalafil at 2.5 mg, taken at about the same time each day. The as-needed start is 10 mg bef…
ExplainerFind why the erection failed before anyone writes a PDE5 script
An erection fails when arterial inflow, venous trapping, nerves, hormones, medicines, or the mental set cannot complete the loop. …
Trial cutThe 3 mg tablet treats two licensed infections. Grade the rest.
The 3 mg tablet is a counted dose, not a slogan. US labeling puts two infections on that strip: intestinal Strongyloides stercoral…
Tablet matchPick the worm first. The tablet is the second sentence.
Guessing the parasite is how people pick the wrong anthelmintic. Ivermectin, mebendazole, and albendazole overlap on a few gut wor…
Dose walkChew 100 mg. Pinworm is one tablet. Other gut nematodes take three days.
Pinworm treatment starts with one 100 mg chewable. The same tablet, morning and evening for three days, is the US course for round…
Reviewer
Elena Marchetti signs the answers
She is an infectious-diseases physician and clinical pharmacologist in Milan. She checks each page against the current label and writes the reader replies. Where ivermectin is concerned she will not soften a negative trial.
How a page is built
Label first, then the trial, then the leftover claim
Medicine page
Mechanism, a short ADME strip, the locked strength, interactions, and the few warnings that change a decision. Codes GX-01 to GX-05 stay as file IDs. They are not a voice.
Note
One question per URL. Numbers come from DailyMed, SmPC, WHO sheets, or a named randomized trial. A popular claim that never entered those files is marked as such.
Reader thread
Named questions under each page, six hundred words and up. Replies point back to the FDA, WHO, MedlinePlus, or the trial that settled the point.
The route: how we review · Labs that found the molecules: research network · Who we are: about
Last Updated
Gravix Pharma
Five medicines. Label doses. Named trials.
Each page starts from DailyMed or SmPC and a study with a name. Elena Marchetti writes the reader replies. Nothing is sold.
Browse the drugs