ROSIGLITAZONE

COMMON BRAND NAME(S): Avandia

GENERIC NAME(S): ROSIGLITAZONE MALEATE

 

Description: Rosiglitazone is a thiazolidinedione antidiabetic agent which improves insulin sensitivity by lowering blood glucose level w/o increasing pancreatic insulin secretion.

Onset: Delayed.

Duration: Up to 12 wk.

Pharmacokinetics:

Absorption: Well absorbed from the GI tract after oral admin. Bioavailability: 99%. Time to peak plasma concentration: Approx 1 hr.

Distribution: It crosses the placenta. Volume of distribution: 17.6 L. Plasma protein binding: 99.8% (mainly albumin).

Metabolism: Extensively metabolised via CYP2C8 isoenzyme and minimally via CYP2C9 isoenzyme.

Excretion: Via urine (approx 64%); faeces (approx 23%). Elimination half-life: 3-4 hr.

Rosiglitazone is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes. Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. Rosiglitazone belongs to the class of drugs known as glitazones. It lowers blood sugar by helping to restore your body’s proper response to insulin.

How to use rosiglitazone:

Read the Medication Guide and, if available, the Patient Information Leaflet provided by your pharmacist before you start taking rosiglitazone and each time you get a refill. If you have any questions, ask your doctor or pharmacist.

Take 4 mg of this medication by mouth with or without food as directed by your doctor, usually once or twice daily as an initial dose for 8 to 12 weeks. If inadequate response is achieved after treatment, increase dose to 8 mg once a day. The dosage is based on your medical condition and response to treatment.

Use this medication regularly to get the most benefit from it. To help you remember, take it at the same time(s) each day.

It may take up to 2 to 3 months before you get the full benefit of this drug.

Tell your doctor if your condition does not improve or if it worsens (your blood sugar levels are too high or too low).

This medication may rarely cause or worsen a certain heart problem (congestive heart failure). Tell your doctor right away if you notice any symptoms of heart failure, including: swelling of the hands/feet, unusual/sudden weight gain, trouble breathing, unusual tiredness.

This medication is not recommended for people with certain types of heart failure. Before using this medication, tell your doctor if you have heart failure.

Pregnancy Risk: Category C (Risk cannot be ruled out)

See also Warning section.

Headache or cough may occur. If either of these effects persists or worsens, tell your doctor or pharmacist promptly.

Tell your doctor right away if you have any serious side effects, including:

  • fast/pounding heartbeat,
  • changes in menstrual cycles,
  • bone fracture,
  • vision changes (such as color changes or night vision problems)

Rosiglitazone has rarely caused very serious liver disease. Tell your doctor right away if you develop symptoms of liver disease, including:

  • nausea/vomiting that doesn’t stop,
  • loss of appetite,
  • stomach/abdominal pain,
  • yellowing eyes/skin,
  • dark urine

This medication does not usually cause low blood sugar (hypoglycemia). Low blood sugar may occur if this drug is prescribed with other anti-diabetic medications, or if you do not consume enough calories from food, or if you do unusually heavy exercise. Talk with your doctor or pharmacist about whether the dose of your other diabetic medication(s) needs to be lowered. Symptoms of low blood sugar include sudden sweating, shaking, fast heartbeat, hunger, blurred vision, dizziness, or tingling hands/feet. It is a good habit to carry glucose tablets or gel to treat low blood sugar. If you don’t have these reliable forms of glucose, rapidly raise your blood sugar by eating a quick source of sugar such as table sugar, honey, or candy, or drink fruit juice or non-diet soda. Tell your doctor right away about the reaction and the use of this product. To help prevent low blood sugar, eat meals on a regular schedule, and do not skip meals. Check with your doctor or pharmacist to find out what you should do if you miss a meal.

Symptoms of high blood sugar (hyperglycemia) include thirst, increased urination, confusion, drowsiness, flushing, rapid breathing, and fruity breath odor. If these symptoms occur, tell your doctor right away. Your dosage may need to be increased.

Get medical help right away if you have any very serious side effects, including: symptoms of a heart attack (such as chest/jaw/left arm pain, shortness of breath, unusual sweating).

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

Precautions:

Before taking rosiglitazone, tell your doctor or pharmacist if you are allergic to it; or to other glitazones such as pioglitazone; 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.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: liver disease, heart disease (such as congestive heart failure, heart attack, angina), fluid in the lungs, swelling (edema), anemia, eye (retina) problems, bone problems (such as osteoporosis, osteopenia).

You may experience blurred vision, dizziness, or drowsiness due to extremely low or high blood sugar levels. Do not drive, use machinery, or do any activity that requires alertness or clear vision until you are sure you can perform such activities safely.

Limit alcohol while taking this medication because it can increase your risk of developing low blood sugar.

It may be harder to control your blood sugar when your body is stressed (such as due to fever, infection, injury, or surgery). Consult your doctor because this may require a change in your treatment plan, medications, or blood sugar testing.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

This medication may increase the risk of bone fracture (usually in the upper arm, hand, or foot), especially in women. See also Notes section.

This medication can cause changes in a woman’s menstrual cycle (promote ovulation) and increase the chance of pregnancy. Consult your doctor or pharmacist about using reliable birth control while taking this medication.

During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.

Pregnancy may cause or worsen diabetes. Discuss a plan with your doctor for managing your blood sugar while pregnant. Your doctor may change your diabetes treatment during your pregnancy (such as diet and medications including insulin).

It is unknown if this medication passes into breast milk. Consult your doctor before breast-feeding.

Interactions:

A product that may interact with this drug is: insulin.

Beta-blocker medications (such as metoprolol, propranolol, glaucoma eye drops such as timolol) may prevent the fast/pounding heartbeat you would usually feel when your blood sugar level falls too low (hypoglycemia). Other symptoms of low blood sugar, such as dizziness, hunger, or sweating, are not affected by these drugs.

Many drugs can affect your blood sugar levels, making it more difficult to control your blood sugar. Before you start, stop, or change any medication, talk with your doctor or pharmacist about how the medication may affect your blood sugar. Check your blood sugar levels regularly as directed by your doctor. Tell your doctor about the results and of any symptoms of high or low blood sugar. (See also Side Effects section.) Your doctor may need to adjust your anti-diabetic medication, exercise program, or diet.

Overdose:

If overdose is suspected, contact a poison control center or emergency room right away.

Notes

Do not share this medication with others.

Attend a diabetes education program to learn more about diabetes and the important aspects of its treatment, including medications, diet, exercise, and getting regular eye/foot/medical exams.

Learn the symptoms of high and low blood sugar and how to treat low blood sugar. Check your blood sugar levels regularly as directed.

Lifestyle changes that help promote healthy bones include increasing weight-bearing exercise, stopping smoking, limiting alcohol, and eating well-balanced meals that contain adequate calcium and vitamin D. You may also need to take calcium and vitamin D supplements. Consult your doctor for specific advice.

Keep all regular medical and laboratory appointments. Laboratory tests (such as liver and kidney function tests, fasting blood glucose, hemoglobin A1c, complete blood counts, cholesterol levels) should be performed before you start treatment, periodically to monitor your progress, or to check for side effects.

Missed Dose

If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.

Storage

Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.

Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.

Brands:

Also marketed as

  • Avandia [ GlaxoSmithKline ]

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