Drug Half-Life Calculator
A simple calculator to get the known half-life for medications you're taking.
Consider an alternative
Drug Half-Life Calculator shows warning signs in 2026 — compare the alternatives below before installing. It runs on 10+ sites and was last updated 14 years ago, and scores 23/100 on our health check.
- Small user base (10+ active installs)
- Very few reviews so far
- No update in 13 years
- Only tested up to WordPress 3.5 (latest is 7.1)
How does it stack up?
Side-by-side on installs, updates, ratings & support
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where Drug Half-Life Calculator stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| calculator | >100 |
| drugs | #24 |
| half-life | #43 |
| prescription | #36 |
| widget | >100 |
Version adoption
Share of active sites per release.
About Drug Half-Life Calculator
From the official readme · v1.1Description
This plugin allows you to add a widget to your sidebar or shortcode to a page or post that displays a simple drug half life calculator. The calculator outputs the concentration of the drug that will remain in your system over a period of time. The plugin accepts two values: half-life and dosage. You can find the half life of various drugs and medications at Drugsdb.com.
To see a live example, visit: http://www.drugsdb.com/resources/drug-half-life-calculator/
Use the shortcode [halflife] to display it on posts or pages or add it as a sidebar widget.
Support
Installation
- Download the latest zip file and extract the
drugsdb-half-life-calcdirectory. - Upload this directory inside your
/wp-content/plugins/directory. - Activate the ‘Drugsdb Half-Life Calculator Widget’ on the ‘Plugins’ menu in WordPress.
- Add the widget to your sidebar (using the Appearance > Widgets menu).
- Add to a post or page using the shortcode
[halflife].
Changelog
Optional upgrade, removes the link attribution to DrugsDB.com
1.1
- Removes the link attribution.
1.0
- First release version.
For developers
Is this your plugin? Show off the numbers.
Add a live badge to your site, docs or GitHub README. It updates on its own — no account needed.
Best Drug Half-Life Calculator alternatives
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FAQ
Drug Half-Life Calculator: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 20, 2026
Is Drug Half-Life Calculator free?
Yes. Drug Half-Life Calculator is free to download and use from the official WordPress.org plugin directory.
Is Drug Half-Life Calculator safe to use in 2026?
Drug Half-Life Calculator shows warning signs in 2026 — compare the alternatives below before installing. It runs on 10+ sites and was last updated 14 years ago, and scores 23/100 on our health check.
How many websites use Drug Half-Life Calculator?
Drug Half-Life Calculator is active on 10+ WordPress websites and has been downloaded 2,799 times since it launched in August 2012. It was downloaded 43 times in the last 30 days.
Does Drug Half-Life Calculator work with WordPress 7.1?
Drug Half-Life Calculator is officially tested up to WordPress 3.5.2, while the latest release is 7.1.3. It may still work, but try it on a staging site first.
When was Drug Half-Life Calculator last updated?
The latest version, 1.1, was released on January 1, 2013 (14 years ago).
Who makes Drug Half-Life Calculator?
Drug Half-Life Calculator is developed and maintained by Luke Mlsna.
What are the best alternatives to Drug Half-Life Calculator?
The most popular alternatives to Drug Half-Life Calculator are Cost Calculator Builder (20K+ installs), Cost Calculator for Contact… (5K+ installs) and Calculator Builder (1K+ installs).
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