Health Library: ABCDEFGHIJKLMNOPQRSTUVWXYZ

Meclizine Hydrochloride Oral tablet

What is this medicine?

MECLIZINE (MEK li zeen) is an antihistamine. It is used to prevent nausea, vomiting, or dizziness caused by motion sickness. It is also used to prevent and treat vertigo (extreme dizziness or a feeling that you or your surroundings are tilting or spinning around).

How should I use this medicine?

Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. If you are using this medicine to prevent motion sickness, take the dose at least 1 hour before travel. If it upsets your stomach, take it with food or milk. Take your doses at regular intervals. Do not take your medicine more often than directed.

Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.

What side effects may I notice from receiving this medicine?

Side effects that you should report to your doctor or health care professional as soon as possible:

  • fainting spells

  • fast or irregular heartbeat

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

  • constipation

  • difficulty passing urine

  • difficulty sleeping

  • headache

  • stomach upset

What may interact with this medicine?

  • barbiturate medicines for inducing sleep or treating seizures

  • digoxin

  • medicines for anxiety or sleeping problems, like alprazolam, diazepam or temazepam

  • medicines for hay fever and other allergies

  • medicines for mental depression

  • medicines for movement abnormalities as in Parkinson's disease, or for stomach problems

  • medicines for pain

  • medicines that relax muscles

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

Where should I keep my medicine?

Keep out of the reach of children.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Keep container tightly closed. Throw away any unused medicine after the expiration date.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:

  • asthma

  • glaucoma

  • prostate trouble

  • stomach problems

  • urinary problems

  • an unusual or allergic reaction to meclizine, other medicines, foods, dyes, or preservatives

  • pregnant or trying to get pregnant

  • breast-feeding

What should I watch for while using this medicine?

If you are taking this medicine on a regular schedule, visit your doctor or health care professional for regular checks on your progress.

You may get dizzy, drowsy or have blurred vision. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol can increase possible dizziness. Avoid alcoholic drinks.

Your mouth may get dry. Chewing sugarless gum or sucking hard candy, and drinking plenty of water may help. Contact your doctor if the problem does not go away or is severe.

This medicine may cause dry eyes and blurred vision. If you wear contact lenses you may feel some discomfort. Lubricating drops may help. See your eye doctor if the problem does not go away or is severe.