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Meridia

What are weight loss drugs and how do they work?

Taking a weight loss drug may not result in weight loss by itself. But using diet pills can help an overweight person stay on a diet because nearly all of these medications work on suppressing appetite. "Feeling full" is believed to be related to a number of biochemical processes in the body. Signals to indicate fullness come from fat cells and the gastrointestinal tract; these converge with signals in the central nervous system. Appetite suppressants target a couple of key neurotransmitters in this process: serotonin and norepinephrine. Increased levels of serotonin result in a feeling of fullness. Increasing norepinephrine levels stimulate the central nervous system, decreasing appetite. Only one drug among the weight loss medications works in a different way. Orlistat (Xenical, Alli) works in the gastrointestinal tract to prevent absorption of about a third of ingested fat.

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Meridia

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Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

MERIDIA
(sibutramine hydrochloride) Capsule

MERIDIA®
(sibutramine hydrochloride monohydrate) Capsule

DRUG DESCRIPTION

MERIDIA® (sibutramine hydrochloride monohydrate) is an orally administered agent for the treatment of obesity. Chemically, the active ingredient is a racemic mixture of the (+) and (-) enantiomers of cyclobutanemethanamine, 1-(4-chlorophenyl)-N,N-dimethyl-α-(2-methylpropyl)-, hydrochloride, monohydrate, and has an empirical formula of C17H29Cl2NO. Its molecular weight is 334.33.

The structural formula is shown below:

MERIDIA® (sibutramine hydrochloride monohydrate) Structural Formula Illustration

Sibutramine hydrochloride monohydrate is a white to cream crystalline powder with a solubility of 2.9 mg/mL in pH 5.2 water. Its octanol: water partition coefficient is 30.9 at pH 5.0.

Each MERIDIA capsule contains 5 mg, 10 mg, and 15 mg of sibutramine hydrochloride monohydrate. It also contains as inactive ingredients: lactose monohydrate, NF; microcrystalline cellulose, NF; colloidal silicon dioxide, NF; and magnesium stearate, NF in a hard-gelatin capsule [which contains titanium dioxide, USP; gelatin; FD&C Blue No. 2 (5- and 10-mg capsules only); D&C Yellow No. 10 (5- and 15-mg capsules only), and other inactive ingredients].

What are the possible side effects of sibutramine (Meridia)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop using sibutramine and call your doctor at once if you have a serious side effect such as:

  • flu symptoms;
  • fast or pounding heartbeats;
  • dangerously high blood pressure (severe headache, blurred vision, buzzing in your ears, chest pain, uneven heartbeats);
  • new or worsening shortness of breath;
  • seizure (convulsions)
  • ...

Read All Potential Side Effects and See Pictures of Meridia »

What are the precautions when taking sibutramine hydrochloride monohydrate (Meridia)?

Before taking sibutramine, tell your doctor or pharmacist if you are allergic to it or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: eating disorders (e.g., anorexia nervosa, bulimia nervosa), uncontrolled or poorly controlled high blood pressure, heart or blood vessel disease (e.g., coronary artery disease, history of heart attack or angina, congestive heart failure, abnormal heart rhythms, poor circulation in the arms/legs), stroke or TIA (transient ischemic attack).

Before using this medication,...

Read All Potential Precautions of Meridia »

Last reviewed on RxList: 1/31/2011
This monograph has been modified to include the generic and brand name in many instances.

Meridia - User Reviews

Meridia User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Meridia sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration

 

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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