Lethal Dose (LD50) — DABT Board Exam Prep

Study System

Built around how the exam is actually structured

Coverage across core toxicology, organ systems, ICH/OECD guidances, and the DABT top-300 pharmacology list — with the engine paying closest attention to what you keep missing.

FLASH CARDS

Flip, star, and listen

Flip-animated cards with text-to-speech on either side, and a starred-cards shelf pulled from every category.

QUIZ

Instant right/wrong feedback

Multiple-choice quizzes per category with immediate color-coded feedback, plus quiz resume so you can pick up any quiz, Pop Quiz, or Practice Exam exactly where you left off.

ADAPTIVE

Global Pop Quiz

Pulls your weakest questions across every category — accuracy under 70% — worst first, with a direct link back to the study section that fixes it. Optionally blends in Hard Questions at 25/50/75%.

HARD QUESTIONS

Board-style difficulty, on demand

A dedicated category written to match DABT-style format and difficulty. Blend it into Pop Quiz and Practice Exam at 25/50/75%, with separate personal bests tracked per blend level.

DASHBOARD

A readiness score, not just a percentage

Coverage, accuracy, and mastery combine into one number, backed by a category chart, study streaks, and a quiz trend line, plus achievements and badges.

PRACTICE EXAM

Timed board simulation

25, 50, or 100-question Practice Exams, weighted 70% toward your weak spots, with a category-by-category results breakdown and a personal best tracked separately for each Hard Questions blend level.

READ ALOUD

Built-in text-to-speech

Tap any section to have it — and everything after it — read aloud, so you can study away from the screen.

AUTO-PLAY

Hands-free flash cards

Toggle Play and set independent flip and advance timers — cards turn and move on by themselves, so you can review without touching the screen.

TIMED PRACTICE

Feel the real exam pace

Choose a pace from Slow to Turbo, including Normal at 1.8 minutes per question to match typical DABT timing. A color-coded countdown (amber, then red), Pause, per-question personal bests, and end-of-attempt time stats on both Practice Exam and Pop Quiz.

BACKUP

Your progress, portable

Export your notes, starred cards, quiz history, and achievements to a file you control, and restore it anytime — still no cloud, no account, no sync.

Lethal Dose app home screen showing category list and study tools

Inside the App

Everything lives in one offline library

Open the app and every category is already there — no sync, no login screen, no waiting on a connection during an exam-week study session.

01 Core toxicology, organ systems, and specialty topics — from mechanism of toxicity through ecotoxicology and forensic toxicology.
02 Full ICH/OECD guidance coverage, from S1A carcinogenicity through M4 common technical document sections, including the newer S7A (Safety Pharmacology) and S7B (QT Interval Prolongation) topics.
03 A dedicated Top-300 pharmacology bank, organized by drug class.
04 Personal notes saved per category, plus a random-facts deck for odd-moment review.
05 Backup and restore your notes, stars, quiz history, and achievements to a file you choose — and resume any quiz, Pop Quiz, or Practice Exam right where you left off.

Certification Fit

Built for the DABT exam. Useful well beyond it.

Lethal Dose is built directly against the American Board of Toxicology (DABT) certification blueprint — that's the app's primary use case. The core toxicology and regulatory content also overlaps meaningfully with a few adjacent certifications, and can serve as helpful supplementary review for graduate coursework in toxicology-adjacent degree programs, though the app isn't tailored to any specific exam format or curriculum.

ABAT — American Board of Applied Toxicology

Applied toxicology practice draws on the same mechanism-of-toxicity, risk assessment, and biotransformation fundamentals covered across Lethal Dose's core categories.

ERT — European Registered Toxicologist

Shares the same general toxicology foundation, though ERT's regulatory framework differs from the ICH/FDA-oriented guidance content in the app.

RAC — Regulatory Affairs Certification

The app's ICH and OECD guidance categories (M3, M4, Q3 series, OECD 408/413) touch directly on regulatory toxicology topics relevant to RAC, though RAC spans far more than toxicology alone.

Also a useful supplementary study aid for graduate coursework in toxicology-heavy degree programs — MS/MSc in Toxicology, MPH with environmental or occupational health focus, PharmD, and DVM/veterinary toxicology tracks — where the same core mechanisms and regulatory frameworks are covered.

Lethal Dose (LD50) is not affiliated with, endorsed by, sponsored by, or approved by the American Board of Toxicology (ABT), the United States Medical Licensing Examination (USMLE), or any other certifying or testing body. Offered as helpful subject-matter overlap, not an endorsement or affiliation — see the full Disclaimer.

Study toxicology
like it's on the exam.