Revisó el medicamento.

Revisó is the pretérito indefinido (the simple past / preterite) of revisar.

It is the 3rd person singular form, so it can mean:

• he checked/reviewed
• she checked/reviewed
• you (formal, singular) checked/reviewed

So the sentence gives a completed past action.

The accent mark shows the stress and also helps distinguish it from other forms.

• reviso = I check / I am checking
• revisó = he/she/you formal checked

So the accent is important both for pronunciation and meaning.

The subject is not stated explicitly. Spanish often leaves subject pronouns out because the verb ending already gives that information.

With revisó, the subject could be:

• él = he
• ella = she
• usted = you (formal)

So without more context, you cannot know exactly which one it is.

Because Spanish is a pro-drop language. That means subject pronouns are often omitted when they are not needed.

So instead of saying:

• Él revisó el medicamento

Spanish very often just says:

• Revisó el medicamento

This sounds natural, not incomplete.

Here revisar means something like:

• to check
• to inspect
• to examine
• to review

It does not usually mean to revise in the English sense of editing a piece of writing only, even though the words look similar.

So revisar un medicamento means checking or examining the medication, for example:

• checking the label
• checking whether it was correct
• checking its condition

Spanish usually uses an article with nouns more often than English does.

So el medicamento means:

• the medication
• the medicine
• the drug

It suggests a specific medication that both speaker and listener know about, or that has already been mentioned.

If you said just medicamento by itself in this sentence, it would sound incomplete.

In Spanish, medicamento is a normal countable noun meaning a medication, drug, or medicinal product.

So:

• el medicamento = the medication / the drug
• un medicamento = a medication / a drug

English often uses medicine more generally, but Spanish medicamento usually refers to a more specific medical product.

Yes, but the meaning changes.

• Revisó el medicamento = he/she checked the medication
• Revisó un medicamento = he/she checked a medication

So el refers to a specific one, while un introduces a non-specific one.

Both words can relate to medicine, but they are not always used in exactly the same way.

• medicamento often means a drug/medication as a medical product
• medicina can mean medicine more generally, and it can also mean the field of medicine

In many contexts, medicamento sounds more precise when talking about a specific prescribed or pharmaceutical product.

Yes, it is grammatical and natural, but by itself it feels a bit context-dependent.

A native speaker would usually expect some context, such as:

• a doctor checking a prescription
• a pharmacist checking the medication
• a nurse checking the medicine before giving it

So the sentence is fine, but it sounds like part of a larger situation.

A simple pronunciation guide is:

reh-bee-SOH el meh-dee-kah-MEN-toh

A few notes:

• The stress in revisó is on the last syllable: -só
• The stress in medicamento is on -men-
• In Spain, the d in medicamento is often softer than an English d

Yes, Spanish word order is more flexible than English, although Revisó el medicamento is the most neutral order.

You might also see:

• El medicamento lo revisó el médico = The doctor checked the medication
• El medicamento revisó is not normal here

So the usual pattern is:

verb + direct object

unless you are changing the order for emphasis.

Yes. In this sentence:

• Revisó = the verb
• el medicamento = the direct object

It is the thing being checked or examined.

You can test this by replacing it with a direct object pronoun:

• Lo revisó = He/She checked it

Here lo stands for el medicamento.

Good question. The difference is mainly about how the past action is viewed.

• Revisó el medicamento = he/she checked the medication
  
  • a completed action
• Revisaba el medicamento = he/she was checking / used to check the medication
  
  • ongoing, repeated, descriptive, or background action

So revisó is better if you mean a single completed event.

Yes, but only formal singular you: usted.

So depending on context, Revisó el medicamento could mean:

• He checked the medication
• She checked the medication
• You checked the medication (speaking formally to one person)

It would not mean you all checked. For that, the verb form would be different.

Not necessarily. Revisar is fairly broad.

It could mean checking:

• the label
• the contents
• the dosage
• the expiry date
• whether it was the correct medication

So the sentence tells you that someone checked the medication, but not exactly how or why unless more context is given.