Sulfinpyrazone Warfarin

Clinically important, potentially hazardous interactions with estrogens, methotrexate, phenindione, probenecid, sulfinpyrazone, warfarin... 

Valproic acid Ranitidine Sulfinpyrazone Warfarin sodium... 

The hydrolysis of acetylsalicylic acid (aspirin) has also been described, and it involves the rapid acetylation of Lys199 [123], This reactive site also involves Trp214 and has been called the U-site [124], Drugs that inhibit the hydrolysis of substituted acetylsalicylic acids by HSA and decrease the fluorescence intensity of Trp214 are referred to as U-type drugs (e.g., sulfinpyrazone and warfarin). Because U-type drugs also bind to the site know as site I (which overlaps with subdomain IIA), the U-site and I-site are believed to overlap. Lysine residues also appear to be involved in the /3-lactamase activity of HSA [125],... 

Drug interaction Stereoselective inhibition of the metabolism of (S)-warfarin by sulfinpyrazone coupled to a stereoselective increase in the elimination of (R)-warfarin... 

ANTICOAGULANTS-ORAL SULFINPYRAZONE t anticoagulant effect Uncertain possibly displacement of anticoagulant from plasma proteins, possibly inhibition of CYP2C9-mediated metabolism of warfarin Monitor INR at least weekly until stable... 

S. Toon and W, F, Trager, "Pharmacokinetic implications of stereoselective changes in plasma-protein binding Warfarin-sulfinpyrazone," /. Pharm. ScL, 73 1671-1673 (1984). 

O Reilly RA, Goulart DA. Comparative interaction of sulfinpyrazone and phenylbutazone with racemic warfarin alteration in vivo of free fraction of plasma warfarin. J Pharmacol Exp Ther 1981 219(3) 691-4. 

Motley CH, Goulart DA. The warfarin-sulfinpyrazone interaction stereochemical considerations. Clin... 

Acetaminophen, aldrin, alfentanil, amiodarone, aminopyrine, amitriptyline, amprenavir, androstenedione,antipyrine, astemizole, benzphetamine, budesonide, carbamazepine, celecoxib, chlorpromazine, chlorzoxazone, cisapride, clarithromycin, clozapine, cocaine, codeine, cortisol, cyclophosphamide,cyclosporin, dapsone, delavirdine, dextromethorphan, digitoxin, diltiazem, diazepam, erythromycin, 17j3-estradiol, ethinylestradiol, etoposide, felbamate, fentanyl, flutamide, hydroxyarginine, ifosphamide, imipramine, indinavir, ketoconazole, lansoprazole, loratidine, losartan, lovastatin, (iS)"mephen3d in, methadone, mianserin, miconazole, mifepristone, nelfinavir, nevirapine, nicardipine, nifedipine, odansetron, omeprazole, orphenadrine, proguanil, propafenone, quinidine, quinine, rapamycin, retinoic acid, ritonavir, saquinavir, selegiline, serindole, sufentanil, sulfinpyrazone, tacrolimus, tamoxifen, tamsulosin, taxol, teniposide, terfenadine, tetrahydrocannabinol, theophylline, toremifene, triazolam, trimethadone, trimethoprim, troleandomycin, verapamil, warfarin, zatosetron, Zolpidem, zonisamide... 

Side effects of these two drugs include nausea, skin rash, stomach upset or headaches. A drawback to the use of probenecid or sulfinpyrazone is that because of increased excretion of other organic acids that use the same transport system, the urine becomes more acidic than normal. Acidic urine may encourage the precipitation of uric acid and the formation of kidney stones. To avoid this patients should be treated with allopurinol first. Sulfinpyrazone enhances the effects of warfarin. 

Also analyzed acebutolol, acepromazine, acetaminophen, acetazolamide, acetophenazine, albuterol, amitriptyline, amobarbital, amoxapine, antipsrrine, atenolol, atropine, azata-dine, baclofen, benzocaine, bromocriptine, brompheniramine, brotizolam, bupivacaine, buspirone, butabarbital, butalbital, caffeine, carbamazepine, cetirizine, chlorqyclizine, chlordiazepoxide, chlormezanone, chloroquine, chlorpheniramine, chlorpromazine, chlorpropamide, chlorprothixene, chlorthalidone, chlorzoxazone, cimetidine, cisapride, clomipramine, clonazepam, clonidine, clozapine, cocaine, codeine, colchicine, qyclizine, (yclo-benzaprine, dantrolene, desipramine, diazepam, diclofenac, diflunisal, diltiazem, diphenhydramine, diphenidol, dipheno late, dipyridamole, disopyramide, dobutamine, doxapram, doxepin, droperidol, encainide, ethidium bromide, ethopropazine, fenoprofen, fentanyl, flavoxate, fluoxetine, fluphenazine, flurazepam, flurbiprofen, fluvoxamine, fii-rosemide, glutethimide, glyburide, guaifenesin, haloperidol, homatropine, hydralazine, hydrochlorothiazide, hydrocodone, hydromorphone, hydro g chloroquine, hydroxyzine, ibuprofen, imipramine, indomethacin, ketoconazole, ketoprofen, ketorolac, labetalol, le-vorphanol, lidocaine, loratadine, lorazepam, lovastatin, loxapine, mazindol, mefenamic acid, meperidine, mephenytoin, mepivacaine, mesoridazine, metaproterenol, methadone, methdilazine, methocarbamol, methotrexate, methotrimeprazine, methoxamine, methyl-dopa, methylphenidate, metoclopramide, metolazone, metoprolol, metronidazole, midazolam, moclobemide, morphine, nadolol, nalbuphine, naloxone, naphazoline, naproxen, nifedipine, nizatidine, norepinephrine, nortriptyline, oxazepam, oxycodone, oxymetazo-line, paroxetine, pemoline, pentazocine, pentobarbital, pentoxifylline, perphenazine, pheniramine, phenobarbital, phenol, phenolphthalein, phentolamine, phenylbutazone, phenyltoloxamine, phenytoin, pimozide, pindolol, piroxicam, pramoxine, prazepam, prazosin, probenecid, procainamide, procaine, prochlorperazine, procyclidine, promazine, promethazine, propafenone, propantheline, propiomazine, propofol, propranolol, protriptyline, quazepam, quinidine, quinine, racemethorphan, ranitidine, remoxipride, risperidone, salicylic acid, scopolamine, secobarbital, sertraline, sotalol, spironolactone, sulfinpyrazone, sulindac, temazepam, terbutaline, terfenadine, tetracaine, theophylline, thiethyl-perazine, thiopental, thioridazine, thiothixene, timolol, tocainide, tolbutamide, tolmetin, trazodone, triamterene, triazolam, trifluoperazine, triflupromazine, trimeprazine, trimethoprim, trimipramine, verapamil, warfarin, xylometazoline, yohimbine, zopiclone... 

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