Mb Tab

1 What is Mb Tab?

Brand: Mb Tab, Miltown, Trancot, Equanil, Meprospan

Generic: Meprobamate

Mb Tab is an antianxiety drug. It is used to treat anxiety (tension and nervousness). It works by affecting certain areas of the brain.

It is available in the capsule (extended release) and tablet forms only with your doctor’s prescription.

2 What to Know Before Using

If you are about to start taking Mb Tab, speak with your doctor about what you need to know.


Inform your doctor if you are allergic to any food, preservatives, dyes, or had an allergic reaction when you used this drug before.


It should not be used in children younger than 6 years of age. Use it after consulting your doctor. However, safety and efficacy have not been established.


It should be used with extreme caution as they are more sensitive to its effects especially drowsiness.


It is a category D drug. It should not be used in pregnancy. It can cause harm or death to an unborn baby.

Breast Feeding

Meprobamate passes into breast milk. Do not breast-feed while using it as may cause harmful effects in the baby.

Drug Interactions

Meprobamate may interact with other drugs. Your doctor should be informed of any other medicines which you are taking. He/she may want to change the dosage or drug. Some of them are listed below:

  • Alfentanil
  • Alprazolam
  • Butabarbital
  • Butalbital
  • Carbinoxamine
  • Carisoprodol
  • Diazepam
  • Eslicarbazepine Acetate
  • Estazolam
  • Fospropofol
  • Halazepam
  • Hydrocodone
  • Midazolam
  • Nitrazepam
  • Oxazepam
  • Pentobarbital
  • Sodium oxybate (GHB) because the risk of side effects such as extreme drowsiness or prolonged sleep time may be increased by Meprobamate

Other Medical Conditions

Several other conditions may reduce its effectiveness.

Make sure you inform your doctor of conditions such as:

  • Liver diseases
  • Kidney diseases
  • Nerve disease or damage
  • History of seizures (epilepsy)
  • Alcohol or substance abuse/dependence or suicidal thoughts or attempts
  • Porphyria

3 Proper Usage

Proper usage of Mb Tab requires strict adherence to your doctor’s orders. Take it by mouth with or without food. Do not crush, chew or break it before swallowing.


It is different for different patients. Dosage mentioned below is an average dose. You must follow your doctor’s instructions.

For regular (short-acting) tablets:

Adults and children 12 years of age and older, 400 milligrams (mg) three or four times a day, or 600 milligrams two times a day.

Children 6 to 12 years of age, 100 to 200 (mg) two or three times a day.

For long-acting dosage forms (extended-release tablets):

Adults and children 12 years of age or older, 400 to 800 mg two times a day, in the morning and at bedtime.

Children 6 to 12 years of age, 200 mg two times a day, in the morning and at bedtime.

Missed dose

If you miss a dose, take it as soon as you remember it. If it almost a time for your next dose skips the missed dose and continue your daily schedule. Doubling the dose is harmful.


Store it at room temperature. Keep it away from children.

4 Precautions to Take

Before using Mb Tab, there are some precautions you must take. Your doctor should check your daily progress at regular visits. You should go to your doctor every 4 months at least to make sure if you need to continue it or not.

Avoid drinking alcohol or taking other medications that are CNS depressants (sedatives, tranquilizers, barbiturates, antihistamines, muscle relaxants or anesthetics) while taking Meprobamate. It will add to the effects of alcohol and other depressants.

Your doctor will gradually reduce the dose of this drug before stopping it completely. It is dangerous to suddenly stop taking the drug. It can alter the results of some tests such as metyrapone test and the phentolamine test.

Meprobamate may cause drowsiness, dizziness, blurred vision, or light-headedness. These effects may be worse if you take it with alcohol or certain medicines. Use Meprobamate with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.

Meprobamate is known to cause dry mouth in some patients. Use a saliva substitute or sugarless candy or gums. If the mouth is dry for more than 2 weeks inform your doctor or dentist as dry mouth can lead to dental diseases and fungal infection of the mouth.

5 Potential Side Effects

As with many medications, there are several potential side effects associated with Mb Tab. Some people may experience none or minor side effects. Consult with your doctor if they become problematic or frequent.

More common side effects are:

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.