Jul
16
Alitretinoin
July 16, 2009 | Leave a Comment
Generic Name
Alitretinoin (al-ih-TRET-in-oin)
Brand Name
Panretin
Type of Drug Retinoid.
Prescribed For
Skin lesions of Kaposi’s sarcoma (KS).
General Information
Alitretinoin binds to and activates retinoid receptors in human cells. Once activated, these receptors help stimulate the body’s natural mechanisms for limiting tissue growth—in this case, the growth of KS cells. KS lesions, which are primarily associated with human immunodeficiency virus (HIV), can respond to alitretinoin in as little as 2 weeks, but most people do not start to see results for 48 weeks or, in some cases, 14 weeks or more.
Cautions and Warnings
Do not use alitretinoin if you are allergic or sensitive to retinoids or to any of its ingredients.
Alitretinoin is applied to individual KS lesions. It does not treat systemic KS or prevent new KS lesions from forming.
People requiring systemic KS treatment (those who have developed more than 10 new KS lesions within a month) should not use alitretinoin.
People with swollen lymph glands, KS that affects the lungs or other major organ involvement should not use alitretinoin.
Possible Side Effects .
✓ Most common: rash and burning pain at application site.
♦ Common: itchy, flaking, peeling, cracking, oozing, swelling, and inflammation at application site.
Drug Interactions
• Do not use insect repellant products that contain DEET, a widely used chemical repellant. Alitretinoin increases DEET toxicity.
Usual Dose
Adult: Apply 2-4 times a day to KS skin lesions. Seniors should use this drug with caution.
Child: not recommended.
Overdosage
Little is known about the effects of accidental ingestion. Call your local poison control center or a hospital emergency room for information. If you seek treatment, ALWAYS bring the prescription bottle or container.
Special Information
Apply enough alitretinoin gel to cover the entire skin lesion. Allow the gel to dry for 3-5 minutes before covering the area with clothing. Avoid showering, bathing, or swimming for at least 3 hours.
If you use a bandage or dressing, be sure it is not tight and that air can circulate freely over the area.
Avoid applying alitretinoin to unaffected skin because it may be irritated by the drug. Avoid applying near the nose, eyes, or mouth.
Alitretinoin contains alcohol. Always keep it away from any open flame.
Retinoids can cause unusual sensitivity to the sun. While this has not been seen with alitretinoin, you should avoid prolonged exposure to the sun or use sunscreen while taking this drug.
If you forget a dose, apply it as soon as you remember. If it is almost time for your next dose, apply the forgotten dose and then space the rest of your doses throughout the day. Continue with your regular schedule the next day.
Special Populations
PregnancylBreast-feeding., Alitretinoin can harm the fetus when sufficient levels of the drug are present in the mother’s bloodstream, but it is not known if these levels are achieved during routine use of alitretinoin. Women who are or might be pregnant should only use this drug after discussing its potential benefits and risks with their doctors.
It is not known if alitretinoin passes into breast milk. Nursing mothers who must use alitretinoin should use infant formula.
Seniors: There is no information on use of alitretinoin by seniors. Seniors should use it with caution.
Jul
16
Aliskiren
July 16, 2009 | Leave a Comment
Generic Name
Aliskiren (ah-LISS-kih-ren)
Brand Name Tekturna
Combination Product
Generic Ingredients: Aliskiren + Hydrochlorothiazide Tekturna HCT
Type of Drug
Direct renin inhibitor. Prescribed For
High blood pressure.
General Information
Renin is produced by the kidney in response to a reduction in blood volume and the amount of blood passing through the kidney. Once in the blood, renin reacts with other hormones to forma very powerful blood vessel constrictor called angiotensin E that directly raises blood pressure. Renin also works with a hormore called aldosterone to raise blood pressure and it prevents sodium from being eliminated from the body. This increases the amount of water in the system, raising blood volume and increasing blood pressure. Aliskiren inhibits renin and all of its actions, thereby !owering blood pressure. The blood pressure lowering is usually seen with 2 weeks of starting on treatment. When aliskiren treatment is stopped, blood pressure gradually rises to pre-treatment levels. Only about 21/2% of any dose is absorbed into the blood and it takes about a week to reach a steady level in the blood. Most of the drug that is absorbed is broken down in the liver. The rest passes out of the body unchanged in the urine. Aliskiren may be used alone or with other hypertensives, however its use with maximum doses of an ACE inhibitor has not been adequately studied.
Cautions and Warnings
Do not take aliskiren if you are allergic or sensitive to any of its ingredients.
Angioedema swelling of the face, hands or feet, tongue, or throat can occur at any time during aliskiren treatment. If this happens, stop taking the medicine and go to your doctor’s office or a hospital emergency room for treatment. This reaction can interfere with your breathing.
The safety of aliskiren in people with moderate to severe kidney disease is not known.
The combination of aliskiren and an ACE inhibitor can lead to high blood levels of potassium.
Aliskiren may be less effective in some black patients with high blood pressure, especially when dietary salt intake is high. Nevertheless, it should still be considered a useful blood pressure treatment.
Possible Side Effects
✓ Common: nausea, dizziness, and sleeplessness.
✓ Less common: diarrhea, abdominal pain, upset stomach, GERD, cough, rash high blood uric acid levels, gout, kidney stones, headache, nose and throat irritation, fatigue, upper respiratory infection, and back pain.
✓ Rare: difficulty breathing; swelling of the hands, face, eyes, or whole body; and seizures. Contact your doctor if you experience any side effect not listed above.
Drug Interactions
• Mixing aliskiren with irbesartan can reduce the amount of aliskiren into the blood by 50%. This may reduce the effectiveness of aliskiren.
• Aliskiren has been studied together with both hydrochlorothiazide and valsartan and can be combined with them in blood pressure management. It has been used with amlodipine but may not be better than high dose amlodipine alone.
• Aliskiren’s interaction with ACE inhibitors is not yet fully known.
• Atorvastatin and ketoconazole slow the breakdown of aliskiren, resulting in an increase of aliskiren blood levels by 50% or more. Dosage adjustment may be necessary.
Aliskiren can reduce blood levels of the diuretic furosemide, reducing the diuretic’s effect.
Food Interactions
Aliskiren can be taken without regard to food or meals. Avoid taking it with high fat meals because they can drastically reduce the amount of aliskiren absorbed into the blood.
Usual Dose
Adult (age 18 and over)
Tekturna: 50-300 mg at the same time every day. Tekturna HCT. 1 tablet a day.
Child: not recommended. Overdosage
The most likely symptom of overdose is low blood pressure (symptoms include dizziness and fainting). If you think you have taken an overdose, call your doctor or go to a hospital emergency room. ALWAYS bring the prescription bottle or container.
Special Information
Call your doctor at once if you develop swelling of the face, eyes, lips, tongue, or throat; difficulty swallowing or breathing; hoarseness; or other signs of a drug reaction or allergy.
If you forget a dose, take it as soon as you remember. If you do not remember until it is almost time for your next dose, skip the dose you forgot and continue with your regular schedule. Do not take a double dose.
Special Populations
Pregnancy/Breast-feeding: Aliskiren can injure or kill a developing fetus. Pregnant women should not take aliskiren. Women who suspect they are pregnant must call their doctor at once and stop taking aliskiren when pregnancy is confirmed. In those rare cases where aliskiren is considered life-saving for the mother and there is no substitute for aliskiren, your doctor may advise that you continue on the medicine and then check your baby’s development with periodic ultrasound examinations.
It is not known if this drug passes into breast milk. Nursing mothers should use infant formula.
Seniors: Seniors may have higher blood levels of aliskiren and be more susceptible to drug side effects, but starting dose adjustment is not required.