أين هو الدواء الآن، في الحقيبة أم في البيت؟

Yes. أين (where) commonly comes first in Modern Standard Arabic, and the rest of the sentence follows it. A very typical pattern is:

• أين + (هو/هي) + noun؟
  So أين هو الدواء؟ is a standard Where is the medicine? structure.

هو is a third-person masculine singular pronoun (he/it), used here like a copular placeholder (is). In MSA you can include it for clarity/emphasis, but it’s often optional:

• أين هو الدواء؟ = Where is the medicine? (more explicit)
• أين الدواء؟ = Where is the medicine? (also very common)

الـ is the definite article the.
So:

• دواء = a medicine / medicine (indefinite)
• الدواء = the medicine (a specific one, known in context)

Yes—when you use a pronoun like هو/هي, it should match the noun’s grammatical gender.

• الدواء is grammatically masculine (many nouns are masculine by default, especially when they don’t have a typical feminine marker like ـة). So you use هو, not هي.

الآن means now. It’s flexible in position:

• أين هو الدواء الآن؟ (very natural)
• أين الآن الدواء؟ (possible but less common)
• الآن، أين هو الدواء؟ (fronting for emphasis, like Now, where is the medicine?)

في means in (or sometimes at depending on context). Here it introduces two location options:

• في الحقيبة = in the bag
• في البيت = in the house

In MSA, في governs the genitive case (المجرور), so with full case endings you’d get:

• في الحقيبةِ
• في البيتِ

أم is used in choice questions where you’re asking A or B? and expecting one of the listed options as the answer.

• ... في الحقيبة أم في البيت؟ = ...in the bag or in the house?

أو can mean or too, but it often appears in less strictly “pick one” question contexts, or in statements. In many teaching materials:

• أم = or (which one?) after a question
• أو = or (either/or) more generally

Repeating في is the clearest and most common phrasing:

• في الحقيبة أم في البيت؟

You can sometimes omit the second في in other contexts, but here keeping it makes the structure parallel and unambiguous, especially for learners and in careful MSA.

The Arabic comma ، is used similarly to the English comma. Here it separates the main question from the two options:

• أين هو الدواء الآن، في الحقيبة أم في البيت؟

You might also see it written without the comma; punctuation in Arabic can be flexible.

In fully vowelled/formal pronunciation, you might see something like:

• أَيْنَ هُوَ الدَّوَاءُ الآنَ، فِي الحَقِيبَةِ أَمْ فِي البَيْتِ؟

In everyday writing, these endings are usually omitted:

• أين هو الدواء الآن، في الحقيبة أم في البيت؟

They’re normally linked in speech. Roughly:

• أين هو ≈ ayna huwa (with a light h sound)

Also note:

• أين has a clear initial hamza أ (a glottal stop), so it starts with a definite onset.