← All medications

Hydroxyzine

Medication sedating antihistamine allergy
Aka: Atarax
Brands seen in Singapore: Phymorax, AA Pharma Hydroxyzine, Hydroxyzine Mevon
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Prescribed for itch, skin allergy and anxiety symptoms
When to take
HealthHub: with or without food, per the medicine label
Take with
Water · HealthHub: alcohol adds to the sleepiness
Pros & cons
Pros
  • HealthHub: eases itch from allergy or insect bites
  • FDA label: also used as a pre-anaesthetic sedative
  • SG register: 10 mg and 25 mg strengths are listed
Cons
  • HealthHub: drowsiness, dizziness and dry mouth
  • FDA label: contraindicated if the qt interval is long
  • FDA label: contraindicated in early pregnancy
Sources
  1. HSA — Listing of Registered Therapeutic Products (data.gov.sg open dataset, 5,511 rows, cached in full and filtered locally) · read 2026-08-27
    what it says
    “All 5 registered hydroxyzine products carry Forensicclassification 'Prescription Only' — SIN09981P PHYMORAX TABLET 10 mg · SIN04096P and SIN04142P AA PHARMA HYDROXYZINE CAPSULE 10 mg and 25 mg · SIN16328P/SIN16329P HYDROXYZINE MEVON FILM-COATED TABLETS 25 MG and 10 MG.”
  2. HealthHub (Pharmaceutical Society of Singapore) — Hydroxyzine: what is this medication for · read 2026-08-27
    what it says
    “Hydroxyzine belongs to a group of medicines known as antihistamines … Relief of itch in the eyes, nose or skin (due to an insect bite or allergies) … may also be used to treat symptoms of anxiety”
  3. HealthHub — Hydroxyzine: how should I take or use this medication · read 2026-08-27
    what it says
    “Hydroxyzine may be taken with or without food. Take your medication according to the instructions stated on the medication label. Do not stop taking or adjust the dose of this medication without checking with your doctor.”
  4. HealthHub — Hydroxyzine: precautions · read 2026-08-27
    what it says
    “You have or have ever had: Kidney or liver disease; High blood pressure or abnormal heart rhythm; Respiratory disease; … difficulty in urination, enlarged prostate gland … seizures (fits) or increased eye pressure (glaucoma)”
  5. HealthHub — Hydroxyzine: common side effects · read 2026-08-27
    what it says
    “The mentioned side effects generally affect up to 10% of patients. Drowsiness or feeling tired … Dizziness … Dry mouth … Constipation … Headache”
  6. HealthHub — Hydroxyzine: what food or medication should I avoid · read 2026-08-27
    what it says
    “Avoid drinking alcohol while taking Hydroxyzine as it can cause excessive sleepiness.”
  7. US label for hydroxyzine hydrochloride tablets, Dosage and Administration, via openFDA drug/label.json (effective 2026-06-03) · read 2026-08-27
    what it says
    “For symptomatic relief of anxiety and tension … adults, 50 to 100 mg q.i.d. … For … pruritus … adults, 25 mg t.i.d. or q.i.d. … As a sedative … 50 to 100 mg for adults”
  8. US label for hydroxyzine hydrochloride tablets, Indications and Usage, via openFDA · read 2026-08-27
    what it says
    “Useful in the management of pruritus due to allergic conditions such as chronic urticaria and atopic and contact dermatoses … As a sedative when used as a premedication and following general anesthesia”
  9. US label for hydroxyzine hydrochloride tablets, Contraindications, via openFDA · read 2026-08-27
    what it says
    “contraindicated in patients with known hypersensitivity to cetirizine hydrochloride or levocetirizine hydrochloride. Hydroxyzine is contraindicated in patients with a prolonged QT interval … hydroxyzine is contraindicated in early pregnancy.”
  10. US label for hydroxyzine hydrochloride tablets, Precautions, via openFDA · read 2026-08-27
    what it says
    “THE POTENTIATING ACTION OF HYDROXYZINE MUST BE CONSIDERED WHEN THE DRUG IS USED IN CONJUNCTION WITH CENTRAL NERVOUS SYSTEM DEPRESSANTS … Caution is recommended during the concomitant use of drugs known to prolong the QT interval”
Report a correction View as JSON

Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.