DOKURAKU: Poison & Medicine

DOKURAKU is an educational app for learning the science of poisons and medicines (toxicology) through interactive simulations and quizzes. Its theme is "the dose makes the poison": salt, water and caffeine can all become poisons depending on the amount, and poisons can become medicines. Starting from that surprise, you learn practical knowledge to keep yourself safe and the stories of medicines born from poisons.

Developer: Fuji Bit Inc.

It includes 11 modes and 75 stages (60 quiz questions and 15 simulation challenges).

- The dose makes the poison
Dose and Response: change the number of tablets of a fictional medicine and the body weight, and watch it go from no effect to works to side effects to poisoning. Three dose-response curves show why children must not be given a share of adult medicine.
Therapeutic Window: if 100 people take the same dose, how many are helped and how many get side effects? Compare wide- and narrow-window medicines and the size of individual differences.
Everyday Amounts: check the daily guidelines from public health bodies for salt, caffeine, water, alcohol and vitamins in a quiz.

- Staying safe from natural toxins
Toxic Plants & Mushrooms: 14 questions on dangerous mix-ups such as daffodil vs garlic chives, monkshood vs edible wild plants, and poisonous vs edible mushrooms.
Natural Toxins in Food: a guide and quiz on pufferfish, shellfish toxins, potato sprouts, unripe ume, ginkgo nuts, histamine, ciguatera, and honey and babies.
Dangerous Creatures and First Aid: what to do if you meet hornets, venomous snakes, jellyfish, venomous caterpillars, redback spiders or fish with venomous spines.
Poison Myths: True or False: test old sayings such as "mushrooms that split lengthwise are safe".

- Poisons and medicines in the body
Detox Factory: watch the liver turn fat-soluble substances into water-soluble ones and the kidneys remove them, and see saturation when intake is too high.
Breaking Down Alcohol: compare blood alcohol and acetaldehyde over time by amount, body weight and body type (ALDH2).
Medicine in the Blood: see how the level leaves the effective range when you miss a dose or take a double dose, with different intervals and half-lives.
Medicines from Poisons: foxglove, botulinum toxin, cone snails, the Gila monster, snake venom, yew, willow and more.

Emergency information:
Poison center and emergency contacts (for Japan) and what to do first can be opened from any screen, with no ads on that screen.

Features:
- Simulation challenges: predict first, then try it and see
- Every quiz question comes with an explanation; cleared stages are recorded on the home screen
- Dark and light themes; supports larger text
- Available in 74 languages, following your device language
- No login; start right away

Please note:
DOKURAKU is a learning app and cannot be used for diagnosis or treatment. The medicines in the simulations are fictional and the numbers are estimates for learning. If you feel unwell, contact a medical facility or a poison center. Do not drink alcohol under the legal age.

Price:
- Free
- No in-app purchases or subscriptions
- Banner ads by Pangle at the bottom of the screen (not on the emergency and first-aid screens)