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
Serax
Vistaril vs. Serax Dosage
Vistaril
Serax
| 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 |
| 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
| 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
| 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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