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Clindamycin may prolong the effects of neuromuscular-blocking drugs, such as succinylcholine and vecuronium. [55] [56] [57] Its similarity to the mechanism of action of macrolides and chloramphenicol means they should not be given simultaneously, as this causes antagonism [26] and possible cross-resistance. [medical citation needed]
Lincosamides can interact with anesthetic agents to produce neuromuscular effects. [29] Other adverse reactions include diarrhea, nausea, vomiting, abdominal pain and rash. Topical administration of clindamycin may induce contact dermatitis, dryness, burning, itching, scaliness and peeling of the skin. [30]
Warfarin interacts with many commonly used drugs, and the metabolism of warfarin varies greatly between patients. [27] Some foods have also been reported to interact with warfarin. [27] Apart from the metabolic interactions, highly protein bound drugs can displace warfarin from serum albumin and cause an increase in the INR. [63]
When two drugs affect each other, it is a drug–drug interaction (DDI). The risk of a DDI increases with the number of drugs used. [1] A large share of elderly people regularly use five or more medications or supplements, with a significant risk of side-effects from drug–drug interactions. [2] Drug interactions can be of three kinds ...
Warfarin necrosis is a rare but severe complication of treatment with warfarin or related anticoagulants. [2] The typical patient appears to be an obese, middle aged woman (median age 54 years, male to female ratio 1:3). [1] [3]: 122–3 This drug eruption usually occurs between the third and tenth days of therapy with warfarin derivatives. [1]
For example, warfarin, a commonly-used anticoagulant drug in atrial fibrillation, is metabolised by an enzyme called CYP2C9. Phenytoin, a CYP2C9 inducer, would increase its activity and the rate of warfarin breakdown, thereby reducing its efficacy. [25] Patients should avoid the co-administration of warfarin and phenytoin.
Dabigatran is an oral direct thrombin inhibitor. Dabigatran (Pradaxa) was found to be noninferior to Warfarin in prevention of ischemic stroke, as well as intracranial hemorrhage risk and overall mortality for non-valvular atrial fibrillation according to the RE-LY trial. [9]
β-Lactam antibiotics are indicated for the prevention and treatment of bacterial infections caused by susceptible organisms. At first, β-lactam antibiotics were mainly active only against gram-positive bacteria, yet the recent development of broad-spectrum β-lactam antibiotics active against various gram-negative organisms has increased their usefulness.