How can I set the duration of a medication in the Health app?

Might help to read the actual question before posting boilerplate answers.

Guess the correct answer is

No, at this time, due to some bizarre omission, the Health app does not allow to input the duration of the treatment and you have to make sure you don’t keep taking your pills forever.

kindly correct if I am wrong.

but for now, use the infinitely more customizable Medisafe app.

use a 3rd party app. I am using Medisafe, the UI takes a bit getting used to, but I guess that’s the flip side of it being much more versatile.

Hello Alice2525,

Thanks for reaching out to Apple Support Communities. We see you have some questions about using the Health application on your device, and we'd like to help. The following link may be able to assist, as it walks through how to use this feature: Add and log medications with iPhone, iPad, and Apple Watch - Apple Support

Manually add a medication

1. On your iPhone or iPad, open the Health app.

2. If you're on your iPhone, tap Browse. If you're on your iPad, tap  to open the sidebar.

3. Tap Medications, then tap Add Medication. If you are using Health Records on iPhone or iPad, you'll see suggestions from your health records.

4. Enter the name of the medication in the Search field. 

* If you're in the United States, and the medication is listed, tap the medication.

* If you're outside of the United States, or the medication is not listed, tap Add, then tap Next.

5. Choose the Medication Type. If the medication is unlisted, enter the Strength of the medication or select No Strength Information.

6. Tap Next.

7. Tap Frequency to select an interval, then tap Done.

8. Tap Add a time to further specify when you take the medication, then tap Next.

9. Choose the shape of your medication and tap Next, or you can tap Skip.

10. Select the color of the Medication and Background to customize it.

Let us know if this helps.

Regards.