Free PTCB Cheat Sheet: Units, Order Fields and Safety Checks

A short sheet is most useful when it helps you recall the basics fast. For unit questions, keep the metric relationships clear and write them in one line before solving: 1 g = 1000 mg and 1 L = 1000 mL. For these specific pairs, g to mg and L to mL, multiply by 1000; reverse conversions divide by 1000. Other unit pairs can require different factors, so write the actual relationship before calculating.

Study example: convert 2.5 g to mg. Since grams are larger than milligrams, multiply by 1000. 2.5 g = 2500 mg. Now convert 750 mL to L. Since milliliters are smaller than liters, divide by 1000. 750 mL = 0.75 L.

When you review, keep your notes limited to relationships you can reproduce from memory. A broader review page such as the free PTCB cheat sheet can help you organize these basics alongside other exam topics, and you can print the PDF to mark the conversions you miss.

Many test questions check whether you can read an order safely. Focus on the purpose of each field rather than memorizing a script. Typical fields include the medication name, strength, dosage form, route, quantity, directions, and prescriber information. You may also see patient identifiers and refill information.

If a question asks what a field does, think practically. Strength expresses the amount of active ingredient per stated unit or quantity of product; it is not a general measure of comparative drug potency. Quantity tells how much total product is to be dispensed. Route tells how the medication is intended to be given. Directions explain how the medication is to be used. These fields work together; one clear field does not fix another unclear one.

A useful habit is to ask: what fact is missing that prevents safe processing? That keeps you focused on interpretation instead of guessing.

For exam study, the safest response to an unclear order is not to assume the intended meaning. Look for missing information, conflicting information, unusual abbreviations, or unclear handwriting in the question stem. Appropriate clarification prompts include:

• Please verify the patient identifier.
• Please confirm the intended strength.
• Please clarify the route.
• Please confirm the quantity or directions.
• Please rewrite or restate the unclear abbreviation.

Practice these decisions with original bank questions rather than only rereading notes. The PTCB practice questions bank lets you work through relevant questions and read answer explanations after each one.

Study example, multiple choice: An order lacks a route, and the selected medication is available in multiple forms with different routes. No approved record resolves which was intended. What is the best next step?

• A: Enter the order if the quantity is present.
• B: Assume the most common route for that dosage form.
• C: Clarify the missing route before processing.
• D: Change the strength to match available stock.

Correct answer: C. The route is a required safety detail because it affects how the order is interpreted and processed. A is wrong because a complete quantity does not replace a missing route. B is wrong because assuming intent creates avoidable error risk. D is wrong because availability does not justify changing the order. Written practice helps with this reasoning, but it does not replace observed pharmacy training or workplace policy.

Official exam reference: PTCB PTCE content outline. These study examples are independently written.