Generic Medicines
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GENERIC NAME: tacrolimus
DRUG CLASS AND MECHANISM
Tacrolimus is a drug that suppresses the immune system and is used to
prevent rejection of transplanted organs. Tacrolimus accomplishes its
immune-suppressing effecting by inhibiting an enzymansplantation specialists to
reduce the doe (calcineurin) crucial
for the multiplication of T-cells, cells that are vital to the immune
process. The use of oral tacrolimus allows trse of steroids which are also used to prevent rejection. This
"steroid-sparing effect" is important because of the many side effects
that can occur when larger doses of steroids are used for a long period of
time. Tacrolimus was approved by the FDA in April, 1994 for liver
transplantation and also has been used in patients for heart, kidney,
small bowel, and bone marrow transplantation.
GENERIC AVAILABLE: No
PRESCRIPTION: Yes
PREPARATIONS: Tacrolimus is available as 1mg and 5mg capsules. It
also is available for intravenous use.
PRESCRIBED FOR: Tacrolimus is used for the prevention of rejection
of transplanted organs.
DOSING
Oral tacrolimus is taken twice daily. Doses vary widely and are based
on blood tests that measure the amount of tacrolimus in the body. Taking
tacrolimus with food can reduce some of the abdominal pain that can occur
with this medicine; however, food can reduce the amount of tacrolimus that
is absorbed. This is especially true with fatty foods. Thus, tacrolimus is
best taken without food. If it must be taken with food, it should be taken
with non-fatty food.
DRUG INTERACTIONS
The destruction of tacrolimus by the body may be inhibited by a large
number of drugs, resulting in higher blood levels of tacrolimus, and
possibly increasing its side effects. Such drugs include bromocriptine (Parlodel),
cimetidine (Tagamet), cisapride (Propulsid), clarithromycin (Biaxin),
cyclosporine (Sandimmune; Neoral), danazol (Danocrine), diltiazem (Cardizem;
Tiazac), erythromycin, fluconazole (Diflucan), itraconazole (Sporanox),
ketoconazole (Nizoral), metoclopramide (Reglan), methylprednisolone (Medrol),
nicardipine (Cardene), troleandomycin (Tao), and verapamil (Calan; Isoptin;
Verelan; Covera-HS). Grapefruit juice also may have a similar effect on
tacrolimus and should be avoided.
Other drugs can stimulate the break-down of tacrolimus, decreasing its
blood concentration and possibly reducing its effectiveness. Such drugs
include carbamazepine (Tegretol), nifedipine (Procardia; Adalat);
phenobarbital, phenytoin (Dilantin), rifabutin, and rifampin,
Live virus vaccines should be avoided while receiving tacrolimus or any
other medicine that suppresses the immune system since the vaccines may be
less effective.
Since tacrolimus can cause hyperkalemia (high potassium in the blood), the
use of tacrolimus with diuretics that also cause retention of potassium is
not recommended. Such diuretics include triamterene (found in Dyazide and
Maxzide), amiloride (found in Moduretic), and spironolactone (Aldactone).
Aluminum hydroxide, which is found in many antacids, binds tacrolimus in
the stomach. Aluminum-containing antacids should not be taken with
tacrolimus.
USES
Tacrolimus is used to prevent the body from rejecting a transplanted
organ.
OTHER USES
This medication may also be used for other purposes as determined by
your doctor.
HOW TO USE
Take this medication by mouth exactly as prescribed, usually every 12
hours. It is best taken on an empty stomach 1 hour before or 2 hours after
a meal. If stomach upset occurs, you may take this medication with food;
however, this may decrease the amount of tacrolimus absorbed into your
bloodstream. If you take this on an empty stomach, always take it on an
empty stomach. If you take it with food, always take it with food. Consult
your doctor for more details (since your doctor will be monitoring the
amount of this drug in your blood). Your dose may be adjusted based on
your response, tolerance, and blood tests (tacrolimus trough blood
levels). Follow dosing instructions closely. Do not increase the dose or
take this more often than directed since the chance of side effects will
be increased. Continue taking this medication as directed even if you are
feeling well. Do not eat grapefruit or drink grapefruit juice unless your
doctor instructs you otherwise.
SIDE EFFECTS
Tremor, headache, diarrhea, nausea, increased blood pressure, trouble
sleeping or tingling of the hands or feet may occur. If any of these
effects persist or worsen, notify your doctor promptly. Notify your doctor
promptly if you develop: vomiting, dizziness, anxiety, fever, chills,
weakness, vision changes, chest pain, easy bruising or bleeding, swelling
of the feet or ankles. Tell your doctor immediately if any of these highly
unlikely but very serious side effects occur: fainting, irregular
heartbeat. In the unlikely event you have an allergic reaction to this
drug, seek immediate medical attention. Symptoms of an allergic reaction
include: rash, itching, swelling, dizziness, trouble breathing. If you
notice other effects not listed above, contact your doctor or pharmacist.
PRECAUTIONS
Tell your doctor if you have: kidney disease, liver disease, high
blood pressure, diabetes, any allergies. This medication is not
recommended for use if you have the following medical conditions: heart
disease (e.g., QT prolongation). This medication is not recommended for
use during pregnancy or while breast-feeding. Discuss the risks and
benefits with your doctor.
OVERDOSE
If overdose is suspected, contact your local poison control center or
emergency room immediately. US residents can call the US national poison
hotline at 1-800-222-1222. Canadian residents should call their local
poison control center directly. Symptoms of overdose may include chest
pain, hand tremors, or decrease in amount of urine.
MISSED DOSE
Take this medication as directed. If you miss a dose, take it as soon
as remembered; do not take it if it is near the time for the next dose,
instead, skip the missed dose and resume your usual dosing schedule. Do
not "double-up" the dose to catch up.
STORAGE
Store this medication at room temperature between 59 and 86 degrees F
(15 to 30 degrees C) away from heat and light. Do not store in the
bathroom. Keep this and all medications out of the reach of children.
WARNING
Tacrolimus may leave you less able to
fight infection and could also cause tumors. This medication must be used
in an appropriate setting. Notify your doctor immediately if you develop
signs of infection (such as persistent sore throat or fever), or unusual
growths.
Note : This product information is intended only for residents of the India. Taj Pharmaceuticals Limited, medicines help to treat and prevent a range of conditions—from the most common to the most challenging—for people around the world.