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Patients taking the commonly prescribed epilepsy drug carbamazepine (CARBATROL, EPITOL, EQUETRO, TEGRETOL, TERIL) should be aware that it has clinically important interactions with numerous other prescription and over-the-counter medications.
Patients taking the commonly prescribed epilepsy drug phenytoin (DILANTIN, PHENYTEK), one of the oldest epilepsy drugs, should be aware that it has clinically impor¬tant interactions with many other prescription and over-the-counter medications. Some of these interactions can lead to phenytoin toxicity, and others can lead to ineffective seizure control.
Read about the more than two dozen medications that can have clinically important interactions with aripiprazole, one of the widely used newer atypical antipsychotic drugs that is approved by the FDA for treatment of several disorders including schizophrenia, bipolar disorder and depression.
The article reviews a study on the potentially dangerous, inappropriate prescribing of 77 drugs that pose a high risk to older adults. Of the 67 of these drugs that we had previously reviewed in Worst, Pills, Best Pills News, we had classified 60 (90 percent) of them as “Do Not Use,” and the other seven as "Limited Use."
This article discusses 36 drugs that, when used by people also using a corticosteroid, can either cause toxic interactions with the steroid or decrease the steroid's effectiveness.
The article lists 53 drugs that can interact with the psychiatric drug ABILIFY to either increase the amount in the body, which can lead to toxicity, or decrease the amount rendering the drug less effective.
The article lists 35 different interacting drugs that can either increase blood levels of digoxin, leading to the serious problem of digitalis toxicity or decrease blood levels, causing the drug to be less effective.
Quetiapine (SEROQUEL) can interact with 26 different drugs, increasing its blood levels and causing dangerous side effects such as slowed breathing, dizziness and fainting. The article also lists 10 other interacting drugs that can result in lower blood levels, rendering the drug less effective.
The article lists 24 drugs that can increase the toxicity of oxycodone if taken together with the drug and 11 other drugs that can weaken its effectiveness as a painkiller if they are simutaneously used.
Tizanidine (ZANAFLEX) is a muscle relaxant for which more than 3.8 million prescriptions were filled in the U.S. last year. The article lists more than 64 drugs with which it can have dangerous interactions resulting in excess sedation, difficulty breathing or dangerously low blood pressure that can result in falling.
This article, based on a recent review in Drug Safety, lists 62 prescription drugs that can cause eye disease. The range of drug-induced eye diseases includes diseases of the eyelids, glaucoma, cataracts, retinal damage and optic nerve damage. As is true for drug-induced diseases in other parts of the body, you should consider newly developed eye symptoms beginning shortly after starting a new medication to be possibly drug-induced and consult a physician.
This is the first of a two part series on drug induced psychiatric symptoms that is based on the July 8, 2002 issue of The Medical Letter on Drugs and Therapeutics. Regular readers of Worst Pills, Best Pills News will recognize The Medical Letter as a reference source written for physicians and pharmacists that we often use because of its reputation as an objective and independent source of drug information. The article lists the drugs and their psychiatric adverse effects.