Subject-Verb Agreement with Medical Nouns: The Dose ... Were Adjusted?

“The dose of the two antihypertensive medications were adjusted.” Read it quickly and it sounds fine — which is exactly the problem. It is wrong, and it catches candidates in every language group, because the error isn’t about vocabulary or translation. It’s about how far English lets a verb drift from its subject.

Find the real subject

The subject of that sentence is dose — singular. Not medications, which is simply the nearest noun to the verb. Because the subject is singular, the correct verb is was adjusted.

Notice the second example runs the opposite direction — a plural subject (results) with a singular-looking phrase in between (the ECG). The rule is the same both ways: the verb agrees with the head noun, never the nearest one.

Why clinical writing is especially exposed to this

Clinical sentences are full of exactly the structure that causes this error — a head noun followed by a long descriptive or list-like phrase before the verb arrives:

• “The results of her recent blood tests and imaging show…” (subject: results)
• “A history of hypertension and type 2 diabetes is noted.” (subject: history)
• “The management of her symptoms, including pain relief and mobility support, has been…” (subject: management)

In everyday speech this rarely comes up, because sentences are shorter. In a clinical letter, where precision requires longer noun phrases, the gap between subject and verb widens — and that gap is where the error lives.

The check

Strip the sentence down to just the subject and the verb, deleting everything in between. “The dose… were adjusted” becomes “the dose were adjusted” — and once it’s that short, the error is audible. Do this for every sentence with a noun phrase longer than about four or five words, and the check takes seconds per sentence.

Where it costs you

This is a Language error, scored 0–7. A single instance is invisible — no assessor marks down one slip. But because long clinical noun phrases appear constantly in case-note-based writing, the error repeats, and repetition is what shifts a band.

For the full ranked list of the errors we see most often, start with our 8 grammar errors guide. And because this specific error is genuinely hard to catch in your own writing — you know what you meant, so it reads correctly to you — our OET writing correction service checks your actual letters against all six official criteria.