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SERIOUS DERMATOLOGIC ADVERSE REACTIONS and APLASTIC ANEMIA AND AGRANULOCYTOSIS
Serious Dermatologic Reactions and HLA-B*1502 Allelle
Serious and sometimes fatal dermatologic reactions, including toxic epidermal necrolysis (TEN) and Stevens-Johnson Syndrome (SJS), have occurred in patients treated with carbamazepine. These syndromes may be accompanied by mucous membrane ulcers, fever, or painful rash occur. These reactions are estimated to occur in 1 to 6 per 10,000 new users in countries with mainly Caucasian populations, but the risk in patients of Asian descent is estimated to be about 10 times higher. There is a strong association between the risk of developing SJS/TEN and the presence of HLA-B*1502, an inherited allelic variant of the HLA-B gene that is found almost exclusively in patients with Asian ancestry. Test for HLA-B*1502, prior to initiating EQUETRO in patients with an increased likelihood of carrying this allele. Avoid use of EQUETRO in patients testing positive for the allele unless the benefit clearly outweighs the risk. Discontinue EQUETRO if you suspect that the patient has a serious dermatologic reaction [see WARNINGS AND PRECAUTIONS].
Aplastic Anemia and Agranulocytosis
Aplastic anemia and agranulocytosis can occur during treatment with EQUETRO. The risk of developing these reactions with EQUETRO is 5-8 times greater than in the general population. However, the overall risk in the general population is low (6 cases in a population of one million per year for agranulocytosis and two cases in a population of one million per year for aplastic anemia). Obtain a complete blood count before beginning treatment with EQUETRO, and monitor CBC periodically. Consider discontinuing if EQUETRO if significant bone marrow depression develops [see WARNINGS AND PRECAUTIONS].
EQUETRO (carbamazepine) is a mood stabilizer available for oral administration as 100 mg, 200 mg, and 300 mg extended-release capsules of carbamazepine, USP. Carbamazepine is a white to off-white powder, practically insoluble in water and soluble in alcohol and in acetone. Its molecular weight is 236.27. The chemical name is 5Hdibenz[b,f]azepine-5-carboxamide, and the structural formula is:
EQUETRO® is a multi-component capsule formulation consisting of three different types of beads: immediaterelease beads, extended-release beads, and enteric-release beads. The three bead types are combined in a specific ratio to provide twice-daily dosing of EQUETRO®.
Inactive ingredients: citric acid, colloidal silicon dioxide, lactose monohydrate, microcrystalline cellulose,polyethylene glycol, povidone, sodium lauryl sulfate, talc, triethyl citrate, and other ingredients.
The 100 mg capsule shells contain gelatin-NF, FD&C Blue #2, Yellow Iron Oxide, and Titanium Dioxide, and are imprinted with white ink; the 200 mg capsule shells contain gelatin-NF, Yellow Iron Oxide, FD&C Blue #2, and Titanium Dioxide, and are imprinted with white ink; and the 300 mg capsule shells contain gelatin-NF, FD&C Blue #2, Yellow Iron Oxide, and Titanium Dioxide, and are imprinted with white ink.
What are the possible side effects of carbamazepine (Carbatrol, Epitol, Equetro, Tegretol, Tegretol XR)?
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.
Report any new or worsening symptoms to your doctor, such as: sudden mood or behavior changes, depression, anxiety, insomnia, or if you feel agitated, hostile, restless, irritable, or have thoughts about suicide or hurting yourself.
Call your doctor at once if you have:
- fever, tired feeling, weakness, confusion, pale skin, feeling light-headed or short of...
What are the precautions when taking carbamazepine xr (Equetro)?
Before taking carbamazepine, tell your doctor or pharmacist if you are allergic to it; or to other anti-seizure medications (such as phenobarbital, phenytoin) or to tricyclic antidepressants (such as amitriptyline, desipramine); 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: decreased bone marrow function (bone marrow depression), blood disorders (such as porphyria, anemia), glaucoma, heart disease (such as coronary artery disease, heart failure, irregular heartbeat), kidney disease, liver disease, mineral imbalances (such as low levels of sodium or...
Last reviewed on RxList: 4/22/2016
This monograph has been modified to include the generic and brand name in many instances.
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