Drug General Information (ID: DDIDUCI2P5)
Drug Name			Sulfamethoxazole		Drug Info		Arsenic trioxide		Drug Info
Drug Type		Small molecule				Small molecule
Therapeutic Class		Antiinfective Agents				Antineoplastics
Structure

Mechanism of Sulfamethoxazole-Arsenic trioxide Interaction (Severity Level: Minor)
Increased risk of prolong QT interval Click to Show/Hide Mechanism Graph
Drug Name		Sulfamethoxazole				Arsenic trioxide
Mechanism		Prolong QT interval				Prolong QT interval
Key Mechanism Factor 1
		Factor Name		QT interval
		Factor Description		Long QT syndrome is a heart signaling disorder that can cause a fast, chaotic heartbeat (arrhythmia). Many people may not exhibit symptoms, and usually the condition is detected during routine medical tests. In others, the most common symptoms include: sudden fainting, palpitations, dizziness, seizures, sudden death.
Mechanism Description		Increased risk of prolong QT interval by the combination of Sulfamethoxazole and Arsenic trioxide

References
1	Canadian Pharmacists Association.
2	Cerner Multum, Inc. "Australian Product Information.".
3	Cerner Multum, Inc. "UK Summary of Product Characteristics.".
4	Crouch MA, Limon L, Cassano AT "Clinical relevance and management of drug-related QT interval prolongation." Pharmacotherapy 23 (2003): 881-908. [PMID: 12885102]
5	Darpo B "Spectrum of drugs prolonging QT interval and the incidence of torsades de pointes." Eur Heart J Suppl 3(Suppl K) (2001): K70-80.
6	Lopez JA, Harold JG, Rosenthal MC, Oseran DS, Schapira JN, Peter T "QT prolongation and torsades de pointes after administration of trimethoprin-sulfamethoxazole." Am J Cardiol 59 (1987): 376-7. [PMID: 3492908]
7	Wiener I, Rubin D, Martinez E, et al "QT prolongation and paroxysmal ventricular tachycardia occurring during fever following trimethoprim-sulfamethoxazole administration." Mt Sinai J Med 48 (1981): 53-5. [PMID: 6970886]