Fiancé is suffering from psychosis due to side effect of medication

As the title says.

My fiancé was starting treatment for latent tuberculosis 3 weeks ago and was on the drug isoniozid.

This drug comes with a lot of nasty side effects but one very rare one is mania and psychosis.

She started acting “odd” last week, was complaining of horrible nightmares .. she would randomly zone out and her memory had gotten bad.

A few nights ago she freaked out and things got bad very quickly , she started having audio and visual hallucinations.

I got in contact with the tb team and they told us to stop the medication straight away.

The nurse assured us that things would settle down soon as the drugs come out of her system but honestly .. I’m petrified that this has done some sort of permanent damage.

She seems better than what she was but she is still experiencing moments of delusion and parts of the day where she will just zone out , or she will get frightened and confused.

We are getting married next year and I’m so scared that this isn’t going to go away.

I’ve taken some urgent leave from work so I can be with her , we’ve been going out on little walks and meet ups with her parents just to get her out and about a bit and she seems to enjoy that, I’ve made sure to be fully supportive and gentle with her , she’s surrounded by love and positivity and I’m hoping it is going to help.

But I am very frightened and worried for her, any advice would be greatly appreciated.

I also just want to add that the nurse told me that unless she starts trying to hurt herself or others there should be no need to go up to the hospital as it’s a side effect from the medication.