Antibiotic vs Drug vs Medication

When to use each in English, with meaning, register, and examples.

Antibiotic

Top 2,000 (common)

Drug

Top 1,000 (very common)A2noun

Medication

Top 2,000 (common)B2noun
Most common: Drug
 AntibioticDrugMedication
Pronunciation🇬🇧 //ˌæntɪbaɪˈɒtɪk//🇺🇸 //ˌæntɪbaɪˈɑːtɪk//🇬🇧 /["/drʌɡ/"]/🇺🇸 /["/drʌɡ/"]/🇬🇧 /["/ˌmedɪˈkeɪʃn/"]/🇺🇸 /["/ˌmedɪˈkeɪʃn/"]/
MeaningA medicine that kills bacteria or stops their growth.A substance that can change how the body or mind works.A drug used to treat medical conditions.
ExampleThe doctor prescribed an antibiotic for my infection.The doctor prescribed a new drug to help with the patient’s condition.Are you currently taking any medication?
RegisterNeutralNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)Top 2,000 (common)
CEFR level-A2B2
Part of speechnounnoun
Collocationsprescribed antibiotic, take antibiotics, antibiotic resistance, broad-spectrum antibioticillegal, illicit, addictive, inject, baron, kingpin, lord, drink and drugs, drugs and alcohol, powerful, strong, effective, course, dose, be on, take, prescribe (somebody), cure something, help something, treat something, company, prices, drug against, drug forprescribed, prescription, non-prescription, be on, receive, take, medication for
Antonyms-medicine, cureplacebo, nonmedication, inactivity
Common mistakesConfused with 'antiviral', which treats viruses., Using 'antibiotic' inappropriately for viral infections., Mispronouncing the term, especially in a medical context.Confused with 'medication' - 'drug' can refer to illegal substances., Using the word casually around sensitive topics, which might offend., Assuming 'drug' only means illegal substances.Confused with 'medicine' and 'medication', thinking they are interchangeable., Using 'medication' as a countable noun when it is uncountable., Not specifying the type of medication (e.g., prescription vs. over-the-counter).
Usage notesUsed in medical contexts. Appropriate for discussions on health, but avoid casual settings. Refers specifically to bacterial infections, not viral ones.Used in both medical and recreational contexts. Be careful with informal usage; it can sound negative or carry stigma. In formal contexts, it often refers to prescribed medications.Used in both spoken and written English. It's appropriate in medical contexts and discussions about health but should be avoided in overly casual settings.

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Drug
Medication

Frequently asked questions: Antibiotic vs Drug vs Medication

What's the difference between Antibiotic, Drug, and Medication?

Antibiotic: A medicine that kills bacteria or stops their growth. Drug: A substance that can change how the body or mind works. Medication: A drug used to treat medical conditions.

Which is more common: Antibiotic, Drug, and Medication?

Drug is the most common in everyday English.

Which is more advanced: Antibiotic, Drug, and Medication?

Medication is the highest level, at B2, on the CEFR scale.

Can you show an example of each?

Antibiotic: The doctor prescribed an antibiotic for my infection. Drug: The doctor prescribed a new drug to help with the patient’s condition. Medication: Are you currently taking any medication?

Can I use Antibiotic, Drug, and Medication interchangeably?

Not always. Antibiotic, Drug, and Medication are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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