Vistaril vs. Serax

See how Vistaril and Serax compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Vistaril is an antihistamine with no boxed warning, while Serax is a benzodiazepine that carries FDA boxed warnings for dependence, misuse, and dangerous opioid interactions.

  • Both drugs treat anxiety, but Vistaril also relieves allergic itching and hives, while Serax is also approved for alcohol withdrawal symptoms.

  • Stopping Serax abruptly can cause serious withdrawal reactions including seizures, a risk that does not apply to Vistaril.

Vistaril vs. Serax Drug Summary

Vistaril

Vistaril (hydroxyzine pamoate) is an antihistamine used as an antianxiety agent to relieve tension and anxiety and to control itching from allergic skin conditions. It comes as an oral capsule or suspension, usually taken multiple times a day.

Serax

Serax (oxazepam) is a benzodiazepine used to treat anxiety disorders and to ease symptoms of alcohol withdrawal. It is taken as an oral capsule, typically three to four times a day.

Vistaril vs. Serax Side Effects

Vistaril

Most common
Drowsiness (most common)
Dry mouth (common)
Involuntary movements (rare)
Urticaria (uncommon)

Serax

Most common
Drowsiness (most common)
Dizziness (uncommon)
Vertigo (uncommon)
Headache (uncommon)

Vistaril vs. Serax Dosage

Vistaril

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 50-100 mg 4 times daily At the start
Maximum dose 50-100 mg daily divided If needed
Dose changes 2 increases As tolerated

Serax

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 10-15 mg 3-4x daily At the start
Maximum dose 15-30 mg 3-4x daily If needed
Dose changes 1 increase As tolerated

Vistaril vs. Serax Indications

Vistaril

Vistaril is FDA-approved for short-term relief of anxiety and tension linked to psychoneurosis and other conditions. It also treats itching from allergic skin problems like chronic hives and dermatitis, and doctors use it for sedation before and after anesthesia.

  • Anxiety and tension from psychoneurosis

  • Adjunct for anxiety in organic disease states

  • Chronic urticaria (hives)

  • Itching from atopic or contact dermatitis

Serax

Serax is FDA-approved for managing anxiety disorders and for short-term relief of anxiety symptoms. It is also approved to ease symptoms of alcohol withdrawal, and it is sometimes used off-label for insomnia.

  • Management of anxiety disorders

  • Short-term relief of anxiety symptoms

  • Symptoms of alcohol withdrawal

  • Off-label: insomnia (not FDA-approved)

Vistaril vs. Serax Pros and Cons

Vistaril

Vistaril has a long track record and carries no boxed warnings, making it a lower-risk option for people who need ongoing anxiety relief or itch control. It does require dosing multiple times a day and comes with a QT prolongation warning that calls for caution in some patients.

Pros

  • No boxed warning for dependence or misuse

  • Also treats allergic itching and chronic hives

  • Available as both capsule and liquid suspension

Cons

  • Not effective for alcohol withdrawal

  • Often dosed up to four times a day

  • Carries a QT prolongation warning

  • Contraindicated in early pregnancy

Serax

Serax works well for acute anxiety and is also approved for alcohol withdrawal, but it carries boxed warnings for abuse, dependence, and dangerous interactions with opioids. Its short half-life is easier on the liver, though stopping it suddenly can trigger serious withdrawal symptoms.

Pros

  • Also approved for alcohol withdrawal symptoms

  • Short half-life with no active metabolites

  • Often preferred in elderly or liver-impaired patients

Cons

  • Boxed warnings for dependence, misuse, and opioid interactions

  • Risk of life-threatening withdrawal seizures if stopped abruptly

  • Controlled substance, which limits refills

  • Brand-name Serax discontinued; only generic oxazepam sold

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