Source-reviewed by Aaron Emmel, PharmD, MHA on May 12, 2026. Last updated May 12, 2026.
Pharmacy technician abbreviations are shorthand terms used in prescription directions, medication routes, dosage forms, measurements, pharmacy workflow, and exam vocabulary. Common examples include BID for twice daily, PO for by mouth, gtt for drop, mL for milliliter, sig for directions, and CPhT for Certified Pharmacy Technician.
The safest way to study them is to translate each abbreviation into plain English and avoid error-prone shorthand in patient-facing communication. This guide is a categorized study aid, not workplace policy or patient-specific medical advice.
Pharmacy Tech Scholar℠ is independent and is not affiliated with or endorsed by PTCB or NHA. This post is intended for educational purposes only, and the information provided should not be used for pharmacy decision-making.
If you’d like a quick study tool, scroll to the bottom and try the sample flashcard set!
Table of Contents
- Quick Answer
- How to Use This Cheat Sheet Safely
- Pharmacy Technician Abbreviations Cheat Sheet
- Frequency and Timing
- Routes of Administration
- Eye and Ear Abbreviations
- Dosage Forms
- Measurements and Quantities
- Prescription and Order Processing
- Exam and Credential Terms
- Error-Prone or Recognition-Only Terms
- Study Decision Path: Study Use vs Workplace Use
- How to Translate a Sig Code
- Practice Set: Translate Pharmacy Abbreviations
- Common Mistakes
- Five-Day Study Plan
- FAQ
- Final Practical Next Step
- Source Review Methodology
- Official Sources Checked
Quick Answer
Start with five buckets: frequency and timing, administration path, dosage forms, measurements, and workflow or credential terms. The safest study habit is to decode the abbreviation, rewrite the full instruction, and notice which terms are recognition-only because they can be unsafe or unclear in patient-facing communication.
Use the category links below when you need a fast lookup, then practice with the sig translations and self-check set.
- Frequency and Timing
- Routes of Administration
- Eye and Ear Abbreviations
- Dosage Forms
- Measurements and Quantities
- Prescription and Order Processing
- Exam and Credential Terms
- Error-Prone or Recognition-Only Terms
After this cheat sheet, use the PTCE study guide to organize broader exam prep.
How to Use This Cheat Sheet Safely
Terms were selected from common pharmacy technician study vocabulary, sig-code translation practice, approved exam-body terminology references, and the approved medication-safety abbreviation reference listed below. This is not a complete exam blueprint, a complete medical abbreviation dictionary, or a workplace abbreviation policy.
Use the labels this way:
- Common study term: useful for recognition and study drills.
- Common sig-code term: often appears in prescription-direction practice.
- Medication-safety caution: recognize the shorthand, but prefer safer plain-English wording when communicating directions.
- Verify locally: check pharmacist direction, employer policy, prescriber wording, and system standards.
- Credential/exam-body term: check PTCB or NHA for current exam and credential details.
Rows marked as medication-safety cautions are supported by the ISMP List of Error-Prone Abbreviations, Symbols, and Dose Designations where they involve error-prone abbreviations or dose designations.
Pharmacy Technician Abbreviations Cheat Sheet
Use this table for study recognition and plain-language translation. Use the category links or page search to find a term quickly.
| Abbreviation | Plain meaning | Category | Study/use label | Safer or study wording |
|---|---|---|---|---|
| AC | before meals | frequency and timing | common sig-code term | before meals |
| PC | after meals | frequency and timing | common sig-code term | after meals |
| BID | twice daily | frequency and timing | common sig-code term | twice daily |
| TID | three times daily | frequency and timing | common sig-code term | three times daily |
| QID | four times daily | frequency and timing | common sig-code term | four times daily |
| qh | every hour | frequency and timing | common sig-code term | every hour |
| q4h | every 4 hours | frequency and timing | common sig-code term | every 4 hours |
| q6h | every 6 hours | frequency and timing | common sig-code term | every 6 hours |
| q8h | every 8 hours | frequency and timing | common sig-code term | every 8 hours |
| q12h | every 12 hours | frequency and timing | common sig-code term | every 12 hours |
| QHS | at bedtime | frequency and timing | verify locally; common study term | at bedtime |
| QAM | every morning | frequency and timing | verify locally | every morning |
| QPM | every evening | frequency and timing | verify locally | every evening |
| PRN | as needed | frequency and timing | common sig-code term | as needed for the stated reason |
| STAT | immediately | frequency and timing | common sig-code term | immediately |
| QD | daily | error-prone or recognition-only terms | medication-safety caution; recognize only | daily |
| QOD | every other day | error-prone or recognition-only terms | medication-safety caution; recognize only | every other day |
| PO | by mouth | routes of administration | common sig-code term | by mouth |
| SL | under the tongue | routes of administration | common sig-code term | under the tongue |
| IM | into a muscle | routes of administration | common sig-code term | intramuscular |
| IV | into a vein | routes of administration | common sig-code term | intravenous |
| PR | rectally | routes of administration | common sig-code term | rectally |
| PV | vaginally | routes of administration | verify locally | vaginally |
| TOP | on the skin or affected area | routes of administration | common sig-code term | topical |
| INH | inhalation | routes of administration | common sig-code term | inhale or inhalation |
| SC | under the skin | routes of administration | medication-safety caution; recognize only | write subcutaneous |
| SQ | under the skin | routes of administration | medication-safety caution; recognize only | write subcutaneous |
| SUBQ | under the skin | routes of administration | verify locally; safer abbreviation in some settings | subcutaneous |
| ID | into the skin | routes of administration | verify locally | intradermal |
| OD | right eye | eye and ear abbreviations | recognize only; avoid in patient-facing communication | right eye |
| OS | left eye | eye and ear abbreviations | recognize only; avoid in patient-facing communication | left eye |
| OU | each eye | eye and ear abbreviations | recognize only; avoid in patient-facing communication | each eye |
| AD | right ear | eye and ear abbreviations | recognize only; avoid in patient-facing communication | right ear |
| AS | left ear | eye and ear abbreviations | recognize only; avoid in patient-facing communication | left ear |
| AU | each ear | eye and ear abbreviations | recognize only; avoid in patient-facing communication | each ear |
| tab | tablet | dosage forms | common study term | tablet |
| cap | capsule | dosage forms | common study term | capsule |
| gtt | drop | dosage forms | common sig-code term | drop |
| supp | suppository | dosage forms | common study term | suppository |
| susp | suspension | dosage forms | common study term | suspension |
| sol | solution | dosage forms | common study term | solution |
| syr | syrup | dosage forms | verify locally | syrup |
| elix | elixir | dosage forms | verify locally | elixir |
| oint | ointment | dosage forms | common study term | ointment |
| crm | cream | dosage forms | common study term | cream |
| gel | gel | dosage forms | common study term | gel |
| patch | patch | dosage forms | common study term | patch |
| neb | nebulizer solution or treatment | dosage forms | verify locally | nebulizer wording your system uses |
| mg | milligram | measurements and quantities | common study term | milligram |
| mcg | microgram | measurements and quantities | common study term | microgram |
| µg | microgram | error-prone or recognition-only terms | medication-safety caution; recognize only | mcg |
| g | gram | measurements and quantities | common study term | gram |
| kg | kilogram | measurements and quantities | common study term | kilogram |
| mL | milliliter | measurements and quantities | common study term | milliliter |
| L | liter | measurements and quantities | common study term | liter |
| tsp | teaspoon | measurements and quantities | verify locally; avoid household-spoon assumptions | measured mL wording when policy uses it |
| tbsp | tablespoon | measurements and quantities | verify locally; avoid household-spoon assumptions | measured mL wording when policy uses it |
| oz | ounce | measurements and quantities | verify locally | ounce |
| cc | cubic centimeter | error-prone or recognition-only terms | recognize only; avoid in patient-facing communication | mL |
| U | unit | error-prone or recognition-only terms | recognize only; avoid in patient-facing communication | unit |
| IU | international unit | error-prone or recognition-only terms | recognize only; avoid in patient-facing communication | unit |
| qty | quantity | prescription and order processing | common workflow term | quantity |
| qs | sufficient quantity | prescription and order processing | verify locally | quantity sufficient |
| Rx | prescription | prescription and order processing | common workflow term | prescription |
| sig | directions for use | prescription and order processing | common workflow term | directions |
| disp | dispense | prescription and order processing | common workflow term | dispense |
| DAW | dispense as written | prescription and order processing | verify locally | dispense as written per system wording |
| NDC | National Drug Code | prescription and order processing | common workflow term | National Drug Code |
| RF | refill | prescription and order processing | common workflow term | refill |
| eRx | electronic prescription | prescription and order processing | common workflow term | electronic prescription |
| MAR | medication administration record | prescription and order processing | verify locally | medication administration record |
| NPO | nothing by mouth | prescription and order processing | common workflow term | nothing by mouth |
| OTC | over the counter | prescription and order processing | common workflow term | over the counter |
| APAP | acetaminophen | error-prone or recognition-only terms | recognize only; avoid in patient-facing communication | acetaminophen |
| PTCB | Pharmacy Technician Certification Board | exam and credential terms | credential/exam-body term | PTCB |
| PTCE | Pharmacy Technician Certification Exam | exam and credential terms | credential/exam-body term | PTCE |
| CPhT | Certified Pharmacy Technician | exam and credential terms | credential/exam-body term | Certified Pharmacy Technician |
| NHA | National Healthcareer Association | exam and credential terms | credential/exam-body term | NHA |
| ExCPT | Exam for the Certification of Pharmacy Technicians | exam and credential terms | credential/exam-body term | ExCPT |
| NABP | National Association of Boards of Pharmacy | exam and credential terms | board-routing term | NABP |
| ISMP | Institute for Safe Medication Practices | error-prone or recognition-only terms | medication-safety source | medication-safety reference |
Table takeaway: memorizing the shorthand is only step one. For safe use, translate the abbreviation into plain English and check whether the setting calls for the abbreviation, a system-approved phrase, or a full patient-friendly instruction.
Frequency and Timing
Frequency terms answer “when” or “how often.” Study AC and PC together, BID before TID and QID, and PRN with the reason or symptom it applies to.
The highest-risk study trap is daily wording. QD and QOD are useful to recognize in old notes or practice questions, but write daily or every other day in plain English when you are communicating directions.
Study note: BID means twice daily; q12h means every 12 hours. They can look similar in a practice problem, but do not substitute one for the other in real directions unless the order, pharmacist, or pharmacy system supports that wording.
Routes of Administration
These terms answer “how the medication is given.” PO, SL, IM, IV, PR, TOP, INH, and ID are common study-recognition terms, but real workflow wording depends on the order, product, system, and policy.
For subcutaneous wording, recognize SC and SQ, but avoid carrying them into communication. ISMP identifies SC, SQ, and sub q as error-prone and recommends SUBQ or writing subcutaneous.
Do not guess the administration path from the dosage form alone. A tablet is often taken by mouth, but a dosage form does not replace reading the full order.
Eye and Ear Abbreviations
Eye and ear terms are easy to mix up because the patterns look similar: OD, OS, OU, AD, AS, and AU. ISMP includes eye and ear abbreviations in its error-prone abbreviation guidance, so translate them slowly into right eye, left eye, each eye, right ear, left ear, and each ear.
For patient-facing communication, plain English is clearer and safer than the shorthand.
Dosage Forms
Dosage-form terms describe what the medication is or how it is packaged: tab, cap, gtt, supp, susp, sol, syr, elix, oint, crm, gel, patch, and neb. When studying, pair the dosage form with the administration path and frequency so you practice reading the whole direction.
For example, “1 tab PO BID” is not just “tablet.” It means amount, dosage form, administration path, and frequency working together. Also be careful with gtt: a drop instruction still needs the product and site, such as eye, ear, or another ordered location.
Measurements and Quantities
Measurement terms such as mg, mcg, g, kg, mL, L, qty, and qs belong with pharmacy math, product selection, and system checks. The plain-English unit matters because a small unit error can change the dose meaning.
Use mcg for microgram in study notes and avoid copying ambiguous unit shorthand into patient-facing communication. For oral liquids, do not assume household spoons are acceptable wording; use measured mL wording when your approved system or policy requires it.
Practice number safety too: write a leading zero for doses under 1, such as 0.5 mL, and avoid trailing zeros, such as 1.0 mL. ISMP includes leading-zero and trailing-zero dose designations in its error-prone list.
Prescription and Order Processing
Workflow terms such as Rx, sig, disp, DAW, NDC, RF, eRx, MAR, NPO, and OTC appear around orders, inventory, labels, and records. Some are ordinary vocabulary. Others, such as DAW or MAR, can be system-specific, so verify locally before treating a code as universal.
APAP is better treated as a recognition-only drug-name abbreviation for acetaminophen rather than as a general workflow term.
Exam and Credential Terms
PTCB, PTCE, CPhT, NHA, and ExCPT are not sig codes. They are credentialing and exam terms, and the owning organization controls the current meaning and requirements.
For PTCB terminology, use PTCB’s official CPhT page. For NHA and ExCPT terminology, use the NHA CPhT page. This article is a study aid and does not claim exact coverage of any current exam outline.
For legal title, registration, licensing, or jurisdiction-specific rules, use the relevant regulator directly. PTCB’s state regulations map and the NABP Boards of Pharmacy directory can help route that research, but your local regulator remains authoritative.
For example, a California reader would use the California State Board of Pharmacy page to check California title or registration wording, not an abbreviation study list.
Error-Prone or Recognition-Only Terms
The ISMP List of Error-Prone Abbreviations, Symbols, and Dose Designations identifies abbreviations and dose designations associated with harmful or potentially harmful medication errors. Use this table for recognition and safer wording practice, then follow local policy for actual work.
| Recognition-only term | Risk pattern | Safer plain-English wording |
|---|---|---|
| U or u | Can be misread as zero, 4, or cc | Write unit |
| IU | Can be misread as IV or 10 | Write unit |
| QD | Can be confused with QID | Write daily |
| QOD | Can be confused with QD or QID | Write every other day |
| cc | Can be confused with units | Use mL |
| µg | Can be confused with mg | Use mcg |
| SC, SQ, or sub q | Can be misread or misunderstood | Write subcutaneous, or use SUBQ only where policy allows |
| OD, OS, OU | Eye abbreviations can be confused with ear abbreviations | Write right eye, left eye, or each eye |
| AD, AS, AU | Ear abbreviations can be confused with eye abbreviations | Write right ear, left ear, or each ear |
| Trailing zero, such as 1.0 mg | Decimal point can be missed | Write 1 mg |
| Missing leading zero, such as .5 mg | Decimal point can be missed | Write 0.5 mg |
| MS, MSO4, MgSO4 | Drug-name abbreviations can be confused | Write the full drug name |
| APAP | May not be clear to the reader | Write acetaminophen |
Takeaway: use this table to recognize risky shorthand, then write the safer plain-English wording when the setting calls for clear medication communication.
Study Decision Path: Study Use vs Workplace Use
Abbreviations are useful for study, but the setting determines whether shorthand, system wording, or plain English is appropriate.
- If you are using class notes or flashcards, recognize the term and say the full phrase aloud.
- If you are doing practice sig translation, decode the term and rewrite the whole instruction as a plain sentence.
- If you are entering or reviewing prescription directions, follow pharmacist direction, employer policy, prescriber wording, and the format in your pharmacy system.
- If you are writing for a patient-facing context, prefer clear plain English when policy allows or requires it.
- If your question involves PTCB, NHA, PTCE, ExCPT, or CPhT, use the organization that owns the exam or credential.
- If your question involves a legal title, registration, or licensing, use the regulator for your jurisdiction.
- If the abbreviation changes dose, administration path, timing, patient instructions, or legal authorization, do not guess; clarify through the approved workflow.
How to Translate a Sig Code
Work left to right: amount, dosage form, route, frequency, and reason or timing. Then rewrite the direction as a complete sentence.
- Example 1: “1 tab PO BID” means take one tablet by mouth twice daily. PO gives the route and BID gives the frequency.
- Example 2: “5 mL PO TID PRN” means take 5 mL by mouth three times daily as needed. PRN should always make you ask, “as needed for what?”
- Example 3: “1 gtt OU QHS” means place one drop in each eye at bedtime. OU is recognition-only; plain English is safer for patient-facing wording.
- Example 4: “Apply crm TOP q12h” means apply cream topically every 12 hours. TOP and q12h should be translated before the final wording is used.
- Example 5: “1 cap PO QD” means take one capsule by mouth daily. QD is recognition-only; write daily.
- Example 6: “2 puffs INH q4h PRN” means inhale two puffs every 4 hours as needed. Verify the exact product instructions and reason in the real order.
Do not use these examples as patient-specific medication advice. They are study translations designed to train recognition and plain-language rewriting.
Practice Set: Translate Pharmacy Abbreviations
Use these questions for self-checking, but treat the answer key as study practice rather than patient-specific advice.
Questions
- Translate: 1 tab PO BID.
- Translate: 1 gtt OS QHS.
- Translate: 10 mL PO q6h PRN.
- Explain what DAW on an eRx means.
- Explain what NPO before procedure means.
- Explain what RF 2 means.
Answer Key
- One tablet by mouth twice daily. PO tells you how it is taken; BID tells you how often.
- One drop in the left eye at bedtime. OS and QHS must both be translated.
- 10 mL by mouth every 6 hours as needed. PRN needs a stated reason in a real order.
- Dispense as written on an electronic prescription. Check local system wording and workflow.
- Nothing by mouth before the procedure. Confirm the order and local workflow before acting.
- Two refills. Confirm the refill field and prescription context in the system.
If you can translate the item into a clear sentence and name why each term matters, you are practicing the right skill.
If you missed more than one, study by category instead of trying to memorize one long list.
Common Mistakes
Mistake 1: Memorizing The List Without Translating It
Flashcards help, but the job is translation. Practice turning each abbreviation into a complete sentence.
Mistake 2: Treating Recognition-Only Terms As Safe Wording
Terms like QD, QOD, U, IU, cc, OD, OS, OU, AD, AS, AU, and APAP are useful to recognize, but safer wording is usually plain English.
Mistake 3: Mixing Credential Terms With Legal Authority
CPhT, PTCB, PTCE, NHA, and ExCPT are exam or title terms. Registration, licensing, and legal titles come from jurisdiction-specific regulators. Use the pharmacy technician license vs certification guide when you need to separate an exam credential from legal authorization.
Mistake 4: Studying Eye And Ear Terms Apart
OD, OS, OU, AD, AS, and AU should be studied together because the look-alike pattern is the point. Translate each one into full words before answering a practice question.
Mistake 5: Treating BID And q12h As Always Interchangeable
BID and q12h can both point to two daily administrations in some study examples, but the timing logic is different. Translate the order as written and do not swap terms in real directions.
Mistake 6: Forgetting The PRN Reason
PRN means as needed, but a real direction should make clear what it is needed for. If the reason is unclear in a work setting, clarify through the approved workflow.
Mistake 7: Guessing From The Dosage Form
A dosage form does not prove the administration path. Read the full direction before deciding what the abbreviation means.
Five-Day Study Plan
- Day 1: Learn AC, PC, BID, TID, QID, q4h, q6h, q8h, q12h, QHS, PRN, STAT, QD, and QOD. Goal: translate 10 timing abbreviations without looking.
- Day 2: Group PO, SL, IM, IV, PR, PV, TOP, INH, SC, SQ, SUBQ, and ID by administration path. Goal: explain why SC and SQ are recognition-only terms.
- Day 3: Pair tab, cap, gtt, supp, susp, sol, oint, crm, gel, patch, mg, mcg, µg, and mL with full phrases. Goal: identify at least 5 terms that need safer wording.
- Day 4: Translate 15 short sig examples into plain English and mark recognition-only terms.
- Day 5: Explain PTCB, PTCE, CPhT, NHA, ExCPT, NABP, and ISMP as credential, board-routing, or medication-safety terms instead of sig codes.
Then practice with PTCE practice questions. The practice resource is educational, independent from PTCB and NHA, and should be used after confirming which certification path you are pursuing.
FAQ
What are pharmacy technician abbreviations?
They are shorthand terms a pharmacy technician may see in prescription directions, pharmacy systems, medication-safety references, exam prep, and credentialing language. Examples include BID for twice daily, PO for by mouth, tab for tablet, and CPhT for Certified Pharmacy Technician.
Are pharmacy technician abbreviations the same as sig codes?
Some are, but not all. Sig codes usually refer to prescription-direction shorthand such as timing, route, dosage form, and quantity. Pharmacy technician abbreviations can also include workflow terms such as NDC and credential terms such as PTCB, PTCE, NHA, CPhT, and ExCPT.
What does sig mean on a prescription?
Sig means the directions for use. In pharmacy technician study, a sig-code question usually asks you to translate shorthand into a complete plain-English direction.
What does BID mean in pharmacy?
BID means twice daily. In study examples, translate it as twice daily; in real directions, do not replace BID with a different timing phrase unless the order, pharmacist, or system supports that wording.
What does PRN mean?
PRN means as needed. In real directions, the reason matters, so a PRN instruction should make clear what symptom or situation the medication is needed for.
What is the difference between BID and q12h?
BID means twice daily, while q12h means every 12 hours. They may look similar in some practice examples, but they are not automatically interchangeable in real medication directions.
Which pharmacy technician abbreviations should I study first?
Start with terms that change the instruction sentence: BID, TID, QID, PRN, PO, SL, IM, IV, gtt, mg, mcg, µg, mL, QD, QOD, OD, OS, OU, AD, AS, AU, and APAP. Then add workflow and credential terms.
What does QD mean, and why should I avoid using it?
QD means daily in study recognition, but it can be confused with QID. Write daily in plain English when communicating directions.
What does OU mean in pharmacy abbreviations?
OU means each eye in study recognition. Because eye and ear abbreviations can be confused, write each eye in plain English for patient-facing wording when policy calls for clearer directions.
Which pharmacy abbreviations are error-prone?
Common recognition-only examples include QD, QOD, U, IU, cc, µg, OD, OS, OU, AD, AS, AU, SC, SQ, sub q, MS, MSO4, MgSO4, and APAP. Use the safer wording in the error-prone table and follow local policy for real work.
Are these abbreviations tested on the PTCE or ExCPT?
Abbreviation recognition is useful for pharmacy technician study, but exact exam coverage should be checked with the organization that owns the exam. Use PTCB for PTCE context and NHA for ExCPT context.
Can I use these abbreviations on a patient label?
Do not assume a study abbreviation belongs on a patient-facing label. Follow pharmacist direction, employer policy, software standards, prescriber wording, and medication-safety guidance.
Final Practical Next Step
If your goal is exam prep, review this list by category, complete the practice set without looking, and then move to the PTCE study guide. If your question is about legal authorization, start with the state-by-state pharmacy technician guide and then confirm the answer with the relevant regulator.
Source Review Methodology
Written and source-reviewed by Aaron Emmel, PharmD, MHA.
For this educational glossary, the source review checked three areas: PTCB and NHA credential pages, PTCB/NABP routing pages for regulator lookup, and the ISMP error-prone abbreviation list for medication-safety cautions.
Common abbreviation meanings were reviewed as educational vocabulary and sig-code practice terms. They may vary by workplace system, employer policy, prescriber wording, or local procedure, so use this page to study and translate, not to override the approved wording in front of you.
Official Sources Checked
Source-reviewed date: 2026-05-12.
How this was reviewed: the references below were used for exam-body context, state-routing context, and medication-safety abbreviation guidance. Common study-list definitions and examples were source-reviewed as educational vocabulary, not patient-label wording, workplace policy, or exam-blueprint guidance.
ISMP List of Error-Prone Abbreviations, Symbols, and Dose Designations
PTCB Certified Pharmacy Technician (CPhT)
NHA Certified Pharmacy Technician (CPhT)
PTCB State Regulations and Map
