Meclizine is actually more for true Vertigo - and can be very very sedating. My Mom recently had 6 months of disabling vertigo and took it for several weeks - until we realized she was more of a zombie from the Meclizine than the Vertigo. She went off it slowly . It DID help some with the Vertigo, but didnt stop it - however - luckily she went to a University that treats Vertigo and she has been symptom free for 6 months after 3 treatments there.

To be totally honest - I would never take Meclizine for the dizziness that accompanies panic/anxiety attacks. The dizziness from these attacks are from improper breathing - and Meclizine will not correct your breathing - only you can. If you want - PM me and I will explain diaphragmatic breathing - its lengthly.