Medication reference · MDH-00
How each drug works, when it works, the dose most adults get, and the interaction that hurts people - pulled straight from FDA labels and checked by clinicians. No checkout, no brand rankings.
Three shelves. Jump to the molecule you need - each page keeps a stable MDH code for citations.
Same core pathway, different timing. How long each one lasts, how much food matters, and the side-effect texture that separates them.
A loop diuretic whose oral dose can fail exactly when patients are sickest - and why the bathroom scale beats the lab for tracking it.
An antiparasitic clouded by controversy, and an oral steroid whose entire safety story comes down to one word: duration.
Five dose-focused reads for questions bigger than a single tablet.
The nitric-oxide to cGMP pathway, why the pills still need arousal, and why nitrates are a hard stop.
Read guide → MDH-08Sildenafil, tadalafil, or vardenafil - timing, food, duration, and the trade-offs that decide it.
Read guide → MDH-09Why the penile arteries clog before the coronary ones, and what a new complaint should prompt you to check.
Read guide → MDH-10How loop diuretics move fluid, why potassium drifts, and the daily-weight habit that keeps people out of hospital.
Read guide → MDH-11Why prednisolone works fast, why you taper it slowly, and the side effects that track with time on the drug.
Read guide →Most prescribing mistakes are arithmetic - milligrams confused with micrograms, weight left out of the equation. We build each page around the numbers you calculate at the bedside: mg/kg, intervals, max daily dose, and the toxicity threshold that ends the calculation.
Free dosing reference. No industry sponsors, no checkout link. Brand names mark which salt we mean, nothing more.
We pull the dose rows from the label first, then sanity-check them against peer-reviewed tables. Any calculator or timeline here exists because a wrong unit could hurt someone.
Country-specific dosing differences get a separate line item - prednisolone taper schedules vary, and we say when the US label is the outlier.
Label revisions override our tables on publication day. Treat this site as a worksheet, not the order sheet.
Each drug page starts from a different tray rule - food, QT, weight, milligrams, or a daily-versus-PRN split - then walks the label facts that belong on that card.
Five guides handle the questions that span more than one pill - how the ED drugs work as a class, how to choose between them, why ED is an early heart warning, how water pills actually work, and how to take steroids without getting burned.
Drugs live under /drugs/. Guides under /guides/. The people who check the pages are on /doctors/.
Every page carries a stable MDH code, so a citation in a syllabus or a note will not rot when we refresh a number.
| Drug | Brand | Roughly how long it works | Food matters? | MDH |
|---|---|---|---|---|
| Sildenafil | Viagra | a few hours | yes - a fatty meal delays it | 05 |
| Tadalafil | Cialis | over a day | no | 04 |
| Vardenafil | Levitra | a few hours | yes | 06 |
| Furosemide | Lasix | a couple of hours | no | 01 |
| Prednisolone | Prelone | most of a day | take with food | 03 |
Real clinicians sign off on these pages. Meet the doctors and the pharmacist who check every number on our reviewers page.
PDE5 pills plus any nitrate can drop blood pressure dangerously. That warning is on every ED page for a reason - it is the one interaction you cannot fudge.
MDH-01 through MDH-11 - stable IDs for notes, syllabi, and citations that will not break.
Sildenafil is the generic name for Viagra, the same sildenafil citrate in 25, 50, and 100 mg tablets. The labelled useful window is 30 minutes to four hours aft…
Ivermectin for humans treats two labelled infections: intestinal strongyloidiasis and onchocerciasis (river blindness). The human tablet is 3 mg. For strongyloi…
Tadalafil is the generic name for Cialis, the same 2.5, 5, 10, and 20 mg tablets. Daily use for erectile dysfunction starts at 2.5 mg and may rise to 5 mg. BPH,…
Diuretics, also called water pills, help the kidneys move extra salt and water into the urine, which is how Mayo Clinic explains the blood-pressure drop. The sa…
How does Viagra work? It is sildenafil citrate, a PDE5 inhibitor. Sexual stimulation releases nitric oxide in the corpus cavern…
Corticosteroids, the tablets people call steroids, include prednisone. A Medrol Dosepak packs 21 tablets of methylprednisolone 4 mg across six labeled days. The…
Is Viagra safe for heart patients who are not on a nitrate? Princeton IV and the US carton still stop organic nitrates. Circulation in 1999 recorded 69 FDA deat…
Furosemide 20 mg is the low oral tablet on the Lasix carton. Validus prints that strength as a white oval, 8 mm, with Lasix on one face, under NDC 30698-067. Th…
Vardenafil is the ED pill that most resembles sildenafil: short-acting, taken before sex, and a little sensitive to a heavy meal. For most men the practical dif…
Prednisolone fills Orapred as 15 mg prednisolone base in each 5 mL of sodium phosphate oral solution, and fills Pred Forte as a 1% acetate ophthalmic suspension…
Cialis vs Viagra splits on the clock: tadalafil's as-needed carton runs to 36 hours versus placebo, and 5 mg can sit daily. Viagra (sildenafil) is labelled abou…
We do not sell drugs and we take no sponsorship. Names identify molecules, nothing more.
Check the live label and talk to your own clinician before changing anything. Reading here does not create a doctor-patient relationship.