Hi welcome to the health care magic
Meclizine is good drug that is used in vertigo problem
Your cause for vertigo should be searched for thought detail history...
It can be
peripheral vertigo or central vertigo
Labyrinthitis, menier disease, neuronitis, infection , BPPV etc are some causes
If vertigo related to particular position then it might be positional vertigo
For Labyrinthitis exercise also beneficial along with medication
Check blood sugar level, HB level, blood pressure for initial work up
If needed vestibular function test will be done If no improvement seen
Complete all prescribed course of Meclizine
Hope your concern solved
Consult otorhinolaryngologist for examination and further work up accordingly