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Patients taking the stomach-acid–suppressing drug cimetidine, which is available over the counter as a generic, should be aware of its clinically important interactions with many other prescription medications.
Some drugs, including commonly used prescription and over-the counter medications, can cause photosensitivity, increasing the skin’s vulnerability to sunlight. Nonsteroidal anti-inflammatory drugs and antibiotics are the drug classes with the strongest evidence for photosensitivity.
Patients taking the widely prescribed hypothyroidism drug levothyroxine should be aware that it has clinically important interactions with many other prescription and over-the-counter medications, dietary supplements and even certain foods.
Patients taking the drug sotalol (BETAPACE, BETAPACE AF, SORINE, SOTYLIZE) should be aware that it has clinically important and potentially dangerous interactions with many other prescription medications.
Patients taking the commonly prescribed antidepressant citalopram should be aware that it has clinically important and potentially dangerous interactions with many other prescription and over-the-counter medications.
Patients taking the oral combination antiviral drug PAXLOVID (nirmatrelvir and ritonavir), which is used to treat COVID-19, should be aware that it has clinically important and potentially dangerous interactions with many other prescription medications.
Patients taking the drug quinidine should be aware that it has clinically important and potentially dangerous interactions with many other prescription medications.
Medications are a leading cause of sexual dysfunction in men. Knowing which drugs prescribed or recommended by your doctor can cause sexual dysfunction will allow you to take steps to prevent or minimize this common, often troubling adverse drug effect.
Patients taking the commonly prescribed antidepressant fluoxetine should be aware that it has clinically important and potentially dangerous interactions with many other prescription and over-the-counter medications.
Learn about some of the commonly used medications that may lead to hair loss, also known as alopecia.
Patients taking the commonly prescribed abnormal heart rhythm drug amiodarone should be aware that it has clinically important interactions with many other prescription medications.
Patients taking the commonly prescribed drug atorvastatin, which is a member of the statin family of cholesterol-lowering drugs, should be aware that it has clinically important interactions with many other prescription medications.
Patients taking the commonly used blood thinner warfarin (COUMADIN, JANTOVEN) should be aware that it has clinically important interactions with numerous other prescription and over-the-counter medications, as well as some dietary supplements.
Patients taking the commonly prescribed cholesterol-lowering drug simvastatin (FLOLIPID, VYTORIN, ZOCOR) should be aware that it has clinically important interactions with many other prescription medications.
There are more than 1,000 prescription and over-the-counter medications, as well as certain herbal and dietary supplements, that are implicated in liver injury, and the list continues to grow.
Patients taking the commonly prescribed antibiotic clarithromycin (BIAXIN XL) should be aware that it has clinically important interactions with many other prescription medications.
Public Citizen’s Health Research Group has designated amiodarone as Limited Use because long-term use of this drug can cause many types of adverse effects that can range from mild to life threatening. The drug should be used only when other therapies are ineffective or cannot be tolerated.
Patients taking the commonly prescribed antifungal drug fluconazole (DIFLUCAN) should be aware that it has clinically important interactions with many other prescription medications. Some of these interactions can lead to an increased risk of fatal heart rhythm abnormalities.
In this first of a two-part series, we review some of the many commonly prescribed medications that can damage your eyes and the steps that you can take to protect yourself from these adverse effects. The second part in this series will appear in our February 2020 issue.
Next to Parkinson’s disease, drug-induced parkinsonism is the second most common cause of parkinsonism, accounting for about 8-12% of all parkinsonism cases. Find out which commonly used drugs can cause this condition.
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 many prescription drugs that can interact in dangerous ways with grapefruit or grapefruit products.
Read about the numerous medications that can interact with digoxin, a drug commonly prescribed for heart failure and atrial fibrillation. These interactions can result in either digoxin toxicity or decreased digoxin effectiveness depending on the other drug being used concomitantly.
Tremor is the single most common movement disorder, affecting millions of people in the U.S. If you have tremors, could one of your drugs be the cause? Read this article to learn the answer.
Abnormal involuntary movements (movement disorders) occur as adverse events associated with many widely used medications and can cause substantial hardship for affected individuals. Find out which drugs are associated with these adverse effects.
Summer is a terrific time for healthy outdoor activities, such as walking, hiking, biking and swim¬ming. But for an unlucky few, certain medications can lead to adverse skin reactions following exposure to the sun. Find out whether you are at risk and how to protect yourself.
Atrial fibrillation is one of the most common heart rhythm disorders, afflicting more than 2.7 million Americans. Learn about the most recent guidelines for treating this disorder, issued by the American College of Cardiology and the American Heart Association, and about Public Citizen’s Health Research Group’s assessment of those guidelines.
This article updates and expands our earlier list of drugs that can have harmful interactions with grapefruit juice. The list now includes 82 different drugs.
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 list 34 other medications that can harmfully interact with sleeping pills, increasing their sedative properties and causing excessive sedation. Excessive sedation at night could increase the risk of falls, should the person get up in the night for some reason. Moreover, excessive sedation causing respiratory depression could be dangerous for people with certain disorders, such as lung disease.
The article lists 34 prescription drugs that can have harmful interactions with vincristine. Recognizing signs of toxicity from vincristine early, as described in the article, is urgent because most of the side effects are reversible when the interacting drug is stopped and the patient receives corrective treatment.
After explaining the symptoms of low blood sugar (hypoglycemia) the article lists 42 prescription drugs that can interact with one or more diabetes drugs to increase the chance of hypoglycemia.
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.
The article lists 38 prescription drugs that can harmfully interact with statin drugs. The article also advises that No matter what statin you are taking and regardless of any interacting drugs, you should notify your prescriber immediately if you develop muscle pain, weakness or a darkening of your urine.
Taking alpha-blockers in combination with drugs for erectile dysfunction and with other drugs can cause dizziness and fainting.
In this article we will discuss alfuzosin (UROXATRAL), doxazosin (CARDURA), tamsulosin (FLOMAX) and terazosin (HYTRIN) and drugs with which they can have harmful interactions.
This article lists 27 drugs that can have life-threatening interactions with the widely-used gout drug, colchicine, resulting in dangerously elevated levels of colchicine.
Too much colchicine in the body leads to toxicity such as fever, vomiting, diarrhea, abdominal pain and muscle pains.
Even worse, it can impair the bone marrow’s ability to make red and white blood cells, causing severe anemia and dangerously low numbers of white blood cells. When the number of white blood cells is reduced, your body may have difficulty fighting infections. Most people who have died from colchicine toxicity have had bone marrow toxicity or had preexisting kidney problems.
Every patient on colchicine — whether on other drugs or not — should be alert for evidence of colchicine toxicity as described above.
Despite the dangers of this combination--risk of severe muscle injury, rhabdomyolysis, which can lead to kidney failure or death--many clinicians continue to prescribe them together and cases of life-threatening adverse reactions from continue to be reported to the FDA. Patients taking simvastatin at a dose greater than 20 milligrams a day in combination with amiodarone should let their physician know that this combination puts them at high risk of muscle injury. There are other statins that do not appear to interact with amiodarone that are discussed.
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.
The muscle spasm drug tizanidine (ZANAFLEX) combined with certain other drugs could cause serious complications such as drowsiness and can dramatically lower blood pressure, according to the Food and Drug Administration (FDA). The article lists 20 drugs to avoid if you are using Zanaflex so that you avoid these potentially dangerous interactions.
The article discusses numerous recent examples of the harm that has been caused by off-label prescribing, including the heart drugs amiodarone (Cordarone), many antipsychotic drugs, topiramate (Topamax)and several antidepressants.
Amiodarone has several potentially fatal toxicities, the most important of which is lung toxicity. This has resulted in clinically manifest disease at rates as high as 10 to 17 percent in some series of patients. This type of lung toxicity has been fatal about 10 percent of the time.
The January 5th issue of the Medical Letter, a widely respected source of independent information about pharmaceuticals and dietary supplements, has a review of the increasingly researched problem of the interaction between grapefruit juice and many prescription and over-the-counter drugs. Like most interactions between chemicals in the body, this one involves the impairment, by grapefruit juice, of the body’s ability to metabolize many drugs, leading to higher than expected — and sometimes dangerous — levels of these drugs.This article lists the drugs.
Grapefruit juice can interact with a number of therapeutically important drugs that could lead to the possibility of toxicity. These drugs are listed in the article.