@mecsamer, many members mention feeling sensations like "brain zaps" as they taper off selective serotonin reuptake inhibitors (SSRIs). They are more likely to happen if one tapers too fast or stops abruptly, which is why a slow tapering schedule is recommended.

You can read more about brain zaps here:
- What to Know About Brain Zaps During Antidepressant Withdrawal https://www.healthline.com/health/depression/brain-shakes

Are you currently tapering off Effexor?