PTCB Test Prep Therapeutics

Top 50 Medical Prefixes to Know for the PTCB Exam!

Nov 25th, 2022
top 50 medical prefixes

What are Medical Prefixes?

Even if you do not know the answer to a PTCB question, you can often work out the likely answer if you know medical prefixes.

Prefixes are used at the beginning of words – for example:

  • Hypo-
  • Brady-
  • An-

These words define the meaning of the word.

For example:

  • hypo- and tension, referring to low blood pressure.
  • hypo- and thyroidism, referring to low thyroid hormone.
  • hypo- and glycemia, referring to low blood sugar.

The opposite of hypo is hyper – which refers to elevated beyond the normal range. Hypertension refers to high blood pressure. Hyperglycemia refers to high blood sugar levels – and hyperthyroidism refers to excessive thyroid hormone levels and its effects on the body.

Suffixes are important, too. Unlike prefixes, suffixes appear at the end of words.

To give some examples, ‘-itis’ is a suffix that refers to inflammation.

No matter what word goes before ‘-itis’, it means something is inflamed:

  • Appendicitis – inflammation of the appendix.
  • Glossitis – inflammation of the tongue.
  • Arthritis – inflammation of joints.
  • Gastritis – inflammation of the lining of the stomach.
  • Hepatitis – inflammation of the liver.

Of course, these words are combinations of prefixes and suffixes.

In the case of hepatitis, the prefix hepat- always refers to hepatic, or related to the liver. The prefix arth- always refers to bone joints. The list goes on (hepatitis: hepat + itis = liver + inflammation).

By knowing medicine prefixes and suffixes, it accelerates your knowledge base of disease, anatomy, and pathology. You can work things out. As alluded to earlier, medical prefixes equip you with the ability to work out answers where previously you may have had no idea at all. On the PTCB exam, you may be asked questions about common disease states. It’s important that you know the vocabulary to help you answer these PTCB test questions.

Below, we have put together some of the most common medical prefixes you need to know.

During your career as a pharmacy technician you will come across many more examples. Though they may seem difficult to learn at first, you can – with enough revision – quickly commit these to memory.

Top 50 Medical Prefixes!

A / AnWithoutAnorexia (without appetite)
Ab-Away from / NotAbnormal (not normal)
Ambi-BothAmbidextrous (being about to write with both hands)
Ante-BeforeAntenatal (also known as prenatal care, care before birth)
Anti-AgainstAntidote (against a substance)
Auto-SelfAutonomous (self-control)
Bi-TwoBifocal (lens with 2 parts)
Cata-BreakdownCatabolism (metabolism that breaks complex molecules down)
Con-WithCongenital (with genes at birth)
De-Without / ReversalDecongestant (reversing congestion)
Diplo-DoubleDiplopia (double vision)
Dys-Painful or difficultDyspnoea (difficulty breathing)
Endo-WithinEndoscopy (procedure to look inside the body)
Ecto-OutsideEctopic pregnancy (fertilised egg implants outside the womb)
Epi-AboveEpigastric (above stomach)
Eu-NormalEuthyroid (normal thyroid levels)
Ex-OutwardsExophthalmos (outward protruding of eyes)
Hemi-HalfHemicrania (headache on one side of the head)
Hypo-Lower than normalHypotension (low blood pressure)
Hyper-Higher than normalHypertension (high blood pressure)
Inter-BetweenIntermittent (occurring between irregular intervals)
Intra-WithinIntravenous (injection within the veins)
Juxta-NearJuxta-vesicular (near the bladder)
Macro-LargeMacrophage (a large type of white blood cell)
Mal-BadMalpractice (bad practice)
Mega-Large/greatMegacolon (large colon)
Micro-SmallMicrobiota (small life forms)
Mono-OneMonograph (detailed study of one specific subject)
Morph-ShapeMorphology (shape of organisms)
Multi-ManyMultiform (many different forms)
Neo-NewNeoplasm (new growth)
Nulli-NoneNulliparous (woman who has never given birth)
Oligo-LittleOligospermia (very few sperms)
Pan-AllPanacea (solution to all problems)
Per-ThroughPercutenaous (through skin layer)
Peri-SurroundingPerianal (surrounding the anus)
Poly-ManyPolycystic (many cysts)
Post-AfterPostpartum (after giving birth)
Pre-BeforePrescription (before writing)
Pseudo-False / ResemblingPseudocyst (resembling a true cyst)
Quadri-FourQuadriplegia (relating to all four limbs)
Re-RepeatRe-infection (a repeat infection)
Semi-HalfSemisolid (half solid / half liquid)
Sub-UnderSubcutaneous (under skin)
Supra-AboveSupraspinal (above the spine)
Syn-WithSyncope (fainting; with sudden loss)
Tetra-FourTetracycline (the structure has four cyclic rings)
Trans-ThroughTransdermal (through the dermis layer of the skin)
Un-NotUnconscious (not conscious)
Uni-OneUniparous (producing a single offspring at birth)

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PTCB Test Prep Author


Elaine Walker

Elaine joined PTCB Test Prep in 2017, currently serving as the lead product development manager overseeing both course development and quality improvement. Mrs. Walker is a graduate of California State University and has worked as a pharmacy technician for over twenty years – with particular interests in pediatric pharmacy, extemporaneous compounding, and hospital pharmacy. Over the past 8-years, she has helped prepare thousands of students for the PTCB examination.