Vistaril Injection Dosage
Generic name: hydroxyzine hydrochloride 50mg in 1mL
Dosage form: intramuscular injection
Drug classes: Antihistamines, Miscellaneous anxiolytics, sedatives and hypnotics
Medically reviewed by Drugs.com. Last updated on Jun 16, 2025.
The recommended dosages for VISTARIL (hydroxyzine hydrochloride) Intramuscular Solution are:
| For adult psychiatric and emotional emergencies, including acute alcoholism. | IM: 50–100 mg stat., and q. 4–6h., p.r.n. |
| Nausea and vomiting excluding nausea and vomiting of pregnancy. | Adults: 25–100 mg IM |
| Children: 0.5 mg/lb body weight IM | |
| Pre- and postoperative adjunctive medication. | Adults: 25–100 mg IM |
| Children: 0.5 mg/lb body weight IM | |
| Pre- and postpartum adjunctive therapy. | 25–100 mg IM |
As with all potent medications, the dosage should be adjusted according to the patient's response to therapy.
FOR ADDITIONAL INFORMATION OF THE ADMINISTRATION AND SITE OF SELECTION SEE PRECAUTIONS SECTION. NOTE: VISTARIL (hydroxyzine hydrochloride) Intramuscular Solution may be administered without further dilution.
Patients may be started on intramuscular therapy when indicated. They should be maintained on oral therapy whenever this route is practicable.
Frequently asked questions
- Can you take hydroxyzine for anxiety and sleep?
- Can hydroxyzine be taken long-term?
- Does Benadryl help with or cause anxiety?
- Can dogs take hydroxyzine?
- When can I start drinking if I’m no longer taking hydroxyzine?
- Can you take antihistamines when pregnant?
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