Drug General Information (ID: DDIATFSQ03)
  Drug Name Vardenafil Drug Info Mineral oil Drug Info
  Drug Type Small molecule Small molecule
  Therapeutic Class Impotence Agents Laxatives

 Mechanism of Vardenafil-Mineral oil Interaction (Severity Level: Moderate)
     Increased risk of ventricular arrhythmias Click to Show/Hide Mechanism Graph
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      Drug Name Vardenafil Mineral oil
      Mechanism Prolong QT interval Electrolyte disturbances
      Key Mechanism Factor 1
Factor Name Ventricular arrhythmias
Factor Description Ventricular arrhythmias are abnormal heart rhythms that cause your heart's lower chambers to pump blood instead of pumping it. This can limit or stop your heart from supplying blood to your body. While some of these arrhythmias are harmless and do not cause symptoms, others can have serious, even fatal, effects on your body.
      Mechanism Description
  • Increased risk of ventricular arrhythmias by the combination of Vardenafil and Mineral oil 

Recommended Action
      Management Patients treated with drugs that prolong the QT interval should exercise caution when self-medicating with laxatives. The recommended dosage and duration of use should not be exceeded. Patients should be advised to seek prompt medical attention if they experience symptoms that could indicate the occurrence of torsade de pointes such as dizziness, lightheadedness, fainting, palpitation, irregular heart rhythm, shortness of breath, or syncope.

References
1 Canadian Pharmacists Association.
2 Cerner Multum, Inc. "Australian Product Information.".
3 Cerner Multum, Inc. "UK Summary of Product Characteristics.".
4 Chin RL "Laxative-induced hypokalemia." Ann Emerg Med 32 (1998): 517-8. [PMID: 9774942]
5 Muller-Lissner SA "Adverse effects of laxatives: fact and fiction." Pharmacology 47 (1993): 138-45. [PMID: 8234421]
6 Schaefer DC, Cheskin LJ "Constipation in the elderly." Am Fam Physician 58 (1998): 907-14. [PMID: 9767726]