@Mai-Tatoy If your friend is caregiver see that he/she spend sometime for self care.
Like - exercise , hobby , relax outing . You can take your friend for a cup of coffee which makes a lot of difference for caregivers stress relief. Sometime if you can spend some time with the patient which will also be a relief to him/her.
Support group is another option which gives lots of insight to dealing with the situation.
Suggest to join , if any Rehabilitation program around for their loved one (patient) will be definitely benefits by that .