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In medicine, a contraindication is a condition (a situation or factor) that serves as a reason not to take a certain medical treatment due to the harm that it would cause the patient. [ 1 ] [ 2 ] Contraindication is the opposite of indication , which is a reason to use a certain treatment.
Benzocaine, sold under the brand name Orajel amongst others, is a local anesthetic, belonging to the amino ester drug class, commonly used as a topical painkiller or in cough drops. It is the active ingredient in many over-the-counter anesthetic ointments such as products for oral ulcers. It is combined with antipyrine to form A/B ear drops.
The drug is contraindicated in patients undergoing immunosuppression (for example because of an organ transplant) or cancer therapy, especially with fluorouracil (5-FU) and chemically related (pro)drugs such as capecitabine and tegafur, as well as the antimycotic drug flucytosine, which is also related to 5-FU.
Physicians legally can and often do prescribe medicines for purposes not listed in this section (so-called "off-label uses"). Contraindications - lists situations in which the medication should not be used, for example in patients with other medical conditions such as kidney problems or allergies
The book was distributed for free to all licensed medical doctors in America; only drugs which drug manufacturers paid to appear, appeared in the PDR, and no generic drugs were listed. The 71st Edition, published in 2017, was the final hardcover edition, weighed in at 4.6 pounds (2.1 kg) and contained information on over 1,000 drugs. [ 1 ]
Examples of auxiliary labels placed on prescriptions. An auxiliary label (also called cautionary and advisory label or prescription drug warning label) is a label added on to a dispensed medication package by a pharmacist in addition to the usual prescription label.
The opposite of an indication is a contraindication, [4] a reason to withhold a certain medical treatment because the risks of treatment clearly outweigh the benefits. In the United States, indications for prescription drugs are approved by the FDA. Indications are included in the Indications and Usage section of the Prescribing Information.
It is the strongest warning that the FDA requires, and signifies that medical studies indicate that the drug carries a significant risk of preventable, serious or even life-threatening adverse effects. [2] [3] Economists and physicians have thoroughly studied the effects of FDA boxed warnings on prescription patterns.