Focused Clinical Reference Series

One topic. One well-written document.

Tox In Focus delivers 1–2 page reference guides on specific drugs, drug classes, testing technologies, and validity concepts — the resource you reach for when you need to get smart on something fast, or explain it to someone else.

3 Volumes Published
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1–2 pages. Clinically dense.

Every volume is a focused reference document — pharmacology, detection science, immunoassay gaps, clinical implications, and what the result actually means.

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One topic per volume

A single drug, drug class, testing technology, or validity concept — covered completely, without the surrounding noise.

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Available by request

Volumes are available to subscribers and by request. Contact Dr. Bundy to get access to existing volumes or request a topic.

Published Volumes

Tox In Focus Series

Request a Volume →
New
Tox In Focus — Vol. 03 May 2026
Carfentanil
Synthetic opioid · Fentanyl analogue · DEA Schedule II
Synthetic Opioid ⚠ Immunoassay Gap Schedule II
Street Names "C-50" · "Gray death" · Often unlabeled in pills
Detection Urine ~2–4 days (est.) · Standard IA panels unreliable
Found With Fentanyl · Cychlorphine · Nitazenes · Xylazine
Key Alert Fentanyl test strips do NOT reliably detect carfentanil
Request Vol. 03
Tox In Focus — Vol. 02 May 2026
Cychlorphine
Benzimidazolone synthetic opioid · Orphine analogue
Novel Opioid ⚠ No POC Strip Unscheduled
Street Names No established name · Found unlabeled in pills
Detection Not established · Not detected by standard IA
Found With Fentanyl · Carfentanil · Nitazenes · Phenazolam
Key Alert No POC strip exists. LC-MS/MS required for confirmation
Request Vol. 02
Tox In Focus — Vol. 01 April 2026
Medetomidine
α₂-Adrenergic agonist · Non-opioid sedative · "Rhino tranq"
Sedative / Adulterant ⚠ Not CSA Scheduled Strip Available
Street Names "Rhino tranq" · "Mede" · "Dex"
Detection Not established (illicit) · IV use: <24 hrs
Found With Fentanyl · Xylazine
Key Alert Lateral flow strips available (SAFe-M, BTNX Rapid Response)
Request Vol. 01
About This Series

What Tox In Focus is for

Most clinical education on drug testing covers topics too broadly to be useful at the point of a specific decision — or too superficially to actually build understanding. Tox In Focus takes a different approach.

Each volume focuses entirely on a single topic: one drug, one drug class, one testing technology, one validity concept. The goal is a document that gives you everything you need to know about that specific thing — and nothing you don't — in 1–2 pages.

Volumes are written by Dr. William Bundy Jr., PharmD, and are available to subscribers or by direct request. Topics can also be requested — if your team needs a reference on something not yet in the series, reach out.

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Specific drugs & drug classes

Individual substances or classes — pharmacology, detection windows, immunoassay performance, clinical implications, and result interpretation.

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Testing technologies

How specific test types work, what they detect, where they fail, and what confirmatory testing looks like — explained for clinical and legal contexts.

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Validity & result interpretation

Creatinine, specific gravity, oxidizing adulterants, dilution — what the numbers mean, when to act on them, and when to look deeper.

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Request a topic

If your team has a specific topic that isn't yet covered, contact Dr. Bundy to discuss a custom volume or request a future series entry.

Get Access
Request a Tox In Focus volume.

Volumes are available by request. Reach out to get access to the existing series, request a specific topic, or ask about organizational subscriptions for your clinical team or program.