Prandimet (Repaglinide and Metformin HCl Tablets) Drug Information: Description, User Reviews, Drug Side Effects, Interactions

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February 10, 2012

Prandimet

Diabetes Treatment »

How is diabetes treated?

The major goal in treating diabetes is to minimize any elevation of blood sugar (glucose) without causing abnormally low levels of blood sugar. Type 1 diabetes is treated with insulin, exercise, and a diabetic diet. Type 2 diabetes is treated first with weight reduction, a diabetic diet, and exercise. When these measures fail to control the elevated blood sugars, oral medications are used. If oral medications are still insufficient, treatment with insulin is considered.

Adherence to a diabetic diet is an important aspect of controlling elevated blood sugar in patients with diabetes. The American Diabetes Association (ADA) has provided guidelines for a diabetic diet. The ADA diet is a balanced, nutritious diet that is low in fat, cholesterol, and simple sugars. The total daily calories are evenly divided into three meals. In the past two years, the ADA has lifted the absolute ban on simple sugars. Small amounts of si...

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Prandimet

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PrandiMet®
(repaglinide and metformin HCl) Tablets.

WARNING: LACTIC ACIDOSIS

Lactic acidosis is a rare but serious complication that can occur due to metformin accumulation. The risk increases with conditions such as sepsis, dehydration, excess alcohol intake, hepatic impairment, renal impairment, and acute congestive heart failure.

The onset of lactic acidosis often is subtle, and accompanied only by nonspecific symptoms such as malaise, myalgias, respiratory distress, increasing somnolence, and nonspecific abdominal distress.

Laboratory abnormalities include low pH, increased anion gap and elevated blood lactate.

If acidosis is suspected, PrandiMet (repaglinide and metformin hcl tablets) should be discontinued and the patient hospitalized immediately [See WARNINGS AND PRECAUTIONS].

DRUG DESCRIPTION

PrandiMet (repaglinide and metformin HCl) tablets contain two oral antihyperglycemic drugs used in the management of type 2 diabetes: repaglinide and metformin HCl. The concomitant use of repaglinide and metformin HCl has been previously approved based on clinical trials in patients with type 2 diabetes inadequately controlled on exercise, diet, and metformin HCl alone.

Repaglinide, S(+)2-ethoxy-4(2((3-methyl-1-(2-(1-piperidinyl) phenyl)-butyl) amino)-2-oxoethyl) benzoic acid, is chemically unrelated to the oral sulfonylurea insulin secretagogues. Repaglinide is a white to off-white powder with molecular formula C₂₇H₃₆N₂O₄ and a molecular weight of 452.6 with the structural formula as shown below. Repaglinide is freely soluble in methanol and ethanol. The pKa of repaglinide in acid is 3.9, and the pKa in amine is 6.0.

Structural formula of Repaglinide

Repaglinide Structural Formula Illustration

Metformin HCl (N,N-dimethylimidodicarbonimidic diamide hydrochloride) is not chemically or pharmacologically related to any other classes of oral antihyperglycemic agents. Metformin HCl is a white to off-white crystalline compound with a molecular formula of C₄H₁₁N₅•HCl and a molecular weight of 165.63. Metformin HCl is freely soluble in water and is practically insoluble in acetone, ether, and chloroform. The pKa of metformin HCl is 12.4. The pH of a 1% aqueous solution of metformin HCl is 6.68. The structural formula of metformin HCl is:

Structural formula of Metformin HCl

Metformin HCl Structural Formula Illustration

PrandiMet (repaglinide and metformin hcl tablets) is available as a tablet for oral administration containing 1 mg repaglinide with 500 mg metformin HCl (1 mg/500 mg) or 2 mg repaglinide with 500 mg metformin HCl (2 mg/500 mg) formulated with the following inactive ingredients: poloxamer 188, microcrystalline cellulose, polacrillin potassium, magnesium stearate, hypromellose 3cp or 6cp, povidone, meglumine, sorbitol, talc, titanium dioxide, red or yellow iron oxide, and polyethylene glycol. Propylene glycol is present in the 2 mg/500 mg PrandiMet (repaglinide and metformin hcl tablets) tablets.

What are the possible side effects of metformin and repaglinide (PrandiMet)?

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

Call your doctor at once if you have any of these serious side effects:

chest pain;
sudden numbness or weakness, especially on one side of the body; or
stomach pain, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

Less serious side effects may include:

...

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