@victorlucasg, welcome. You are right to be concerned about your friend. You only have to read a few of the messages in this discussion to hear the stories of people who stopped cold turkey or tapered too quickly.
- Tips on minimizing withdrawal symptoms from Effexor (aka Venlafaxine) https://connect.mayoclinic.org/discussion/tips-on-minimising-withdrawal-symptoms-from-effexor-aka-venlafaxine/

Members like @texasduchess @sears @mothergoose76 and others share some tips in these related discussions:
- How did you cope with Effexor discontinuation symptoms? https://connect.mayoclinic.org/discussion/effexor-discontinuation-symptoms/
- Avoiding discontinuation syndrome during removal of Venlafaxine XR: https://connect.mayoclinic.org/discussion/avoiding-discontinuation-syndrome-during-removal-of-venlafaxine-xr/

This must be very stressful worrying about your friend's well being and feeling the threat of suicide looming. How are you coping?