sulfa drug: meaning, definition, pronunciation and examples
LowTechnical/Medical
Quick answer
What does “sulfa drug” mean?
A synthetic antibacterial drug derived from sulfanilamide, used to treat bacterial infections.
Audio
Pronunciation
Definition
Meaning and Definition
A synthetic antibacterial drug derived from sulfanilamide, used to treat bacterial infections.
Any of a group of synthetic organic compounds that inhibit bacterial growth by interfering with folic acid synthesis; historically important antibiotics largely replaced by newer classes but still used in specific contexts.
Dialectal Variation
British vs American Usage
Differences
Spelling: 'sulpha drug' is the standard British spelling; 'sulfa drug' is standard American spelling.
Connotations
Identical technical/conceptual meaning; both refer to the same class of antimicrobials.
Frequency
Equally low frequency in both dialects, confined to medical/historical contexts.
Grammar
How to Use “sulfa drug” in a Sentence
Patient + be + treated with + sulfa drugDoctor + prescribe + sulfa drug + for + conditionVocabulary
Collocations
Examples
Examples of “sulfa drug” in a Sentence
verb
British English
- The infection was sulpha-drugged successfully.
- They decided to sulpha-drug the patient.
American English
- The infection was sulfa-drugged successfully.
- They decided to sulfa-drug the patient.
adjective
British English
- She has a sulpha-drug allergy.
- This is a sulpha-drug medication.
American English
- She has a sulfa-drug allergy.
- This is a sulfa-drug medication.
Usage
Meaning in Context
Business
Rare; might appear in pharmaceutical industry reports on antibiotic development history.
Academic
Used in medical history, pharmacology, and microbiology texts discussing the development of antibiotics.
Everyday
Very rare; most non-specialists would say 'antibiotic' or refer to a specific medication.
Technical
Standard term in medical charts, pharmacology, and historical clinical literature to denote this specific drug class.
Vocabulary
Synonyms of “sulfa drug”
Strong
Neutral
Weak
Watch out
Common Mistakes When Using “sulfa drug”
- Using 'sulfa drug' to refer to any antibiotic (it's a specific class).
- Confusing 'sulfa' with 'sulfur' topical treatments.
FAQ
Frequently Asked Questions
Yes, but less commonly than in the mid-20th century. Specific sulfa drugs like sulfamethoxazole (often combined with trimethoprim) are still prescribed for certain infections like urinary tract infections and Pneumocystis pneumonia.
Sulfa drugs are synthetic chemicals, while penicillin is derived from a fungus. They also work through completely different biochemical mechanisms to stop bacterial growth.
Because it can cause serious allergic reactions, and it also means the patient should avoid a wide range of related drugs (sulfonamides), including some diuretics and diabetes medications, due to potential cross-reactivity.
It refers to the sulfonamide chemical group (containing sulfur, nitrogen, and oxygen) that is the core structure of these drugs.
A synthetic antibacterial drug derived from sulfanilamide, used to treat bacterial infections.
Sulfa drug is usually technical/medical in register.
Sulfa drug: in British English it is pronounced /ˈsʌlfə drʌɡ/, and in American English it is pronounced /ˈsʌlfə drʌɡ/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None”
Learning
Memory Aids
Mnemonic
Think 'SULfur' (the chemical element sulfur is part of its structure) + 'FA' (from 'folic acid' which it affects) = SULFA drug.
Conceptual Metaphor
A KEY that BLOCKS a bacterial factory (interferes with essential metabolic pathways).
Practice
Quiz
What is the primary mechanism of action of sulfa drugs?