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.
Label starting point: 50 mg PO ~60 min before sex; titrate 25-100 mg based on effect and headache/flush burden. Fasting peak ~60 min; high-fat meal shifts Tmax …
Ivermectin is a genuinely important antiparasitic that has cleared river blindness from whole regions and remains first-line for strongyloidiasis and a reliable…
Tadalafil's half-life near 17.5 hours stretches the PDE5 block to roughly thirty-six hours per dose - the basis for PRN weekend coverage and for 2.5-5 mg daily …
A water pill sounds harmless and vague. In fact loop diuretics are among the most powerful drugs in common use, capable of shifting liters of fluid, and they de…
Erection rigidity is a cGMP balance problem: arousal opens the tap (NO → cGMP), PDE5 is the drain. A PDE5 inhibitor plugs the drain - it never presses the accel…
Prednisolone is one of the most effective and most feared drugs in medicine. It can calm a dangerous flare within hours, and it can cause real harm if used care…
New erectile dysfunction in a man over forty is not only a bedroom problem. It is frequently the first visible symptom of disease in the blood vessels, and it t…
Furosemide is the first-line loop diuretic when you need liters off fast - IV onset in minutes, oral in about an hour. The dose that works is whatever crosses t…
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 is a broadly used corticosteroid that dampens inflammation and the immune system anywhere in the body. It is one of the most effective drugs in med…
The three common ED drugs work by an identical mechanism, so the choice is rarely about which one is stronger. It is about which one fits your body, your schedu…
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.