Response:

I assume the conditions that you are talking about that might require medication are serious events, like psychotic breaks or such. 

In my experience, there are some rare cases where medication is helpful in the short-term to help someone deal with such an extreme psychological episode.

In those cases, it is better to back off the meditation and spiritual practices until stability and balance is restored.

Again, in my experience these situations that require pharmacological intervention are very rare. 

In most cases the occasional bumps on the spiritual path are easily handled with various natural supportive techniques.

Love,

Deepak