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Latin Language · Dosage Forms

Frequency stems in the names of medicinal products

Frequency segments are standardized structural components in drug names that indicate their pharmacological group, therapeutic effect, or target organ. Knowing these term elements allows a physician or pharmacist to instantly understand the purpose of even an unfamiliar drug by looking at its Latin or Greek root.

CardiologyThe segments -cor(d)- and -card(i)- always indicate cardiac agents.
AnalgesicsThe particles -dol- and -alg- in a name indicate a pronounced pain-relieving effect.
AntimicrobialsThe element -cid- denotes drugs that destroy pathogens.
OphthalmologyMultiple roots, including opt- and oc-, mark eye drops and ointments.
3 min readFor medical studentsUpdated 09/24/2026
Material prepared by WhiteCoat Pro editorial team based on platform study guidesReviewed by medical editor: Aulov A. A., general practitioner · 09/24/2026

Cardiovascular system and blood pressure

A vast array of pharmacological drugs is aimed at treating diseases of the heart and blood vessels. To quickly recognize their purpose, it is enough to pay attention to specific term elements:

  • Cardiac agents (cardiotonics, as well as coronary vasodilators) contain the segments -cor(d)- or the Greek root -card(i)-. Examples of such drugs include Chromocor, Stenicardol, and Cordarol.
  • Vascular drugs (antispasmodics and vasodilators) are marked by the segments -vas- and the Greek -ang(i)-. For example: Vasocor, Divascol, and Angitol.
  • Agents affecting blood pressure (primarily antihypertensives, i.e., those that lower it) include the particles -pres(s)- or -ten(s)-. Characteristic names: Depressan, Regutensin, and Protensyl.

Treatment of pain, spasms, and inflammation

Pharmacological names often state directly which clinical symptom they are intended to eliminate:

  • Pain relievers (analgesics) contain the segments -dol- or -alg- (from the Greek word meaning "pain"). This is easily seen in names such as Antidol or Exalgin.
  • Antispasmodics, used to treat muscle spasms, contain the logical and understandable segment spasm-, as in the drugs Spasmex or Spasmol.
  • Antimicrobial medications (bactericidal and antiseptic agents) are easily recognized by the suffix -cid-, which translates as "to kill". This is precisely what is present in the names Streptocidum and Gramicidinum.
  • Antiallergic drugs contain a direct indication of altered body reactivity — the segment -aller(g)- (for example, in the drugs Allergol or Allerton).
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Drugs affecting the nervous system

Drugs affecting the central nervous system are divided into several basic groups with their own unique markers:

  • Hypnotics and general anesthetics (non-inhalational) include the segments -hypn- (of Greek origin) or -dorm- (from the Latin verb dormio — to sleep). Classic examples: Hypnomidate, Dormicum.
  • Sedatives contain the root -sed-, derived from the Latin word meaning "to calm" (Sedalgin, Seduxen).
  • Barbiturates (hypnotic or narcotic agents that are derivatives of barbituric acid) always have the element -barb- in their name (Phenobarbitalum, Proxibarbal).

ENT organs, eyes, and other specialized groups

Many frequency segments directly indicate a specific organ for which the drug is intended, or the medical intervention specialty:

  • Nasal diseases are treated with drugs containing the segments nas- or r(h)in- (Nasivin, Nasonex).
  • Otic agents contain the Greek root ot- (Otinum, Otipax).
  • Ophthalmological drugs (for the eyes) have the greatest variety of term elements: oc-, ok-, oc(u)-, opht(h)alm-, opht(h)-, oft-, opt(ic)-. They can be found in the names Okacin, Betoptic, Octilia, and Oftensin.
  • Gynecological drugs are designated by the segments fem- or gyn- (Femara, Gynalgin).
  • Dermatological agents (used to treat skin diseases) include cut(i)- or -derm- (Psorcutan, Dermatolum).
  • Androgens (male sex hormone preparations) are marked by the roots -test- (testicle), -andr-, and -vir- (man). Examples: Testoviron, Androtin.
  • Vitamins are easily recognized by the multivitamin segment -vit- (Hexavitum, Undevitum), while laxatives are identified by the element -lax- (Regulax).

Briefly: answers to topical questions

Which frequency segments indicate penicillin and cephalosporin antibiotics?

Antibiotics of the penicillin group are designated by the common stem `-cillinum` or `-cillin-`, while cephalosporin antibiotics are indicated by the frequency segment `-cef-` or `-ceph-`.

How to memorize

Many frequency segments are consonant with Russian clinical terms. For example, -card(i)- is associated with cardiology, -derm- with dermatology, and -vit- with vitamins. To memorize the segment -cid- (to kill), simply recall the words "suicide" or "bactericidal".

Class and exam questions

How to distinguish cardiac drugs from vascular drugs by their name?

Cardiac agents contain the stems -cor(d)- and -card(i)-, whereas vascular drugs can be identified by the elements -vas- and -ang(i)-.

Which segment indicates a hypnotic effect of a drug?

Hypnotic drugs usually contain the segments -hypn- (Greek root) or -dorm- (from the Latin word meaning "to sleep").

What does the element -pres(s)- mean in a drug name?

The segments -pres(s)- and -ten(s)- indicate that the drug affects blood pressure. Most often, these are antihypertensive agents designed to lower blood pressure.

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What else to study on this topic

  • Specifics of writing International Nonproprietary Names (INN) in Latin.
  • Principles of forming trade names for combined medicinal products.
  • Differences in the use of Greek and Latin doublets for the same anatomical structures.
  • The structure of compound-shortened words in modern pharmaceutical terminology.

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