Can you build up a tolerance for vistaril and need to take more to get the anti-anxiety effect?

Yes, it happens : Numerous medicines are handled metabolically in the body with need for higher dosing to get equivalent effect over time

Vistaril Tolerance: Vistaril is used as a sedative to treat anxiety. Tolerance can happen if stresses continue or become overwhelming. At age 28, let Wise Man in you ask: •Reasons for ongoing use of Vistaril •Alcohol, Marijuana, Caffeine, and Drug use •Stresses: • Relationships/ Marriage • Separation • Finances •Work •Frustration Please see a Psychiatrist for: •Diagnosis •Therapy •Medication •Breathing Relaxation