For some reason, take a medicine doesn't sound natural to my ears.
Is the phrase take a medicine wrong or unnatural?
I would usually say:
take a pill
or
take some medicine
What word would you use to emphasise that the pill is legitimate and medical?
More on the word medicine
Wiktionary and Online Oxford Dictionary seem to say that the word is countable.
I thought I could use the word medicine as a group of things, pills, liquid, that you take to help you recover from an illness. So I thought it was a mass noun.
What does it mean if you say a medicine?
I couldn't find a good example sentence. However, I could find some sentences that use the word in the plural form.
Is it only used in the plural form when it is used as a countable noun?
Best Answer
You can use both medicine and pill and both can mean that you are taking legitimate therapy. However, sometimes these terms are interchangeable, and sometimes not.
Today a pill refers to all oral solid dosage forms that are intended to be swallowed as such (note that an effervescent tablet for example, most likely won't be referred to as a pill).
The pill or capitalized The Pill (definition 2) refers specifically to birth control pills (i.e. oral contraceptives).
In everyday (colloquial) usage to use the term pill meaning medicine taken orally in a solid dosage form is fine, but as a technical term it would be incorrect (unless of course you are making an exhibition about the history of pharmacy).
But what if you are taking a medicine in a different dosage form?
You might need to take a syrup, an injection (insulin e.g.), use an inhaler etc. In this case pill doesn't work and you have to use the term medicine or use the term for a specific dosage form.
To take a medicine is used less often than to take a pill. But that doesn't mean that the word medicine is used less common in this sense than the word pill. Medicine is more often used in different constructions:
Take the medicine
Take + personal pronoun + medicine:
or
The word medicine can be both countable and uncountable, according to LDOCE.
This Google Ngram shows that in fact, medicine (green) is used more often than pill (bright blue and dark red) except when they are used with the indefinite article:
A side note: medicines can also be administered and (especially for topical medicines) applied. (See more in this post. You definitely don't eat a medicine, but this doesn't apply to Tiggers, because "that's what they like best".