Which of the patient's supplements—1‑3‑C (likely high‑dose vitamin C), iron supplement, LibidoStim (generic unknown), and DHEA (dehydroepiandrosterone)—should be discontinued before surgery?

Preoperative Supplement Management

Stop the 1-3-C (indole-3-carbinol) supplement 2 weeks before surgery, continue iron supplementation, and stop DHEA 2 weeks before surgery; LibidoStim requires clarification of its ingredients but should likely be stopped 2 weeks preoperatively if it contains common sexual health supplement ingredients.

Algorithmic Approach to Each Supplement

1-3-C (Indole-3-Carbinol)

• Recommendation: Hold 2 weeks before surgery 1
• Rationale: The SPAQI consensus statement explicitly lists indole-3-carbinol among supplements that should be held for 2 weeks due to multiple potential drug interactions and effects on cytochrome P450 enzymes 1
• Mechanism of concern: Can affect drug metabolism through enzyme interactions, potentially altering anesthetic and perioperative medication levels

Iron Supplement

• Recommendation: Continue
• Rationale: Iron is not listed among supplements requiring discontinuation in the comprehensive SPAQI guidelines 1
• Supporting evidence: Iron adequacy is essential for perioperative recovery, wound healing, and erythropoiesis 2
• Clinical benefit: Preoperative iron optimization can increase hemoglobin and reduce transfusion requirements 2

LibidoStim

• Recommendation: Likely hold 2 weeks before surgery (pending ingredient verification)
• Rationale: Sexual health supplements typically contain combinations of ingredients that require preoperative discontinuation 3
• Common ingredients in sexual health supplements that require stopping 2 weeks preoperatively include:
  • Ginseng (American, Panax, Siberian): Hold 2 weeks - affects bleeding risk 1
  • Yohimbine: Hold 2 weeks - causes blood pressure instability (both hypertension and hypotension) 1
  • L-arginine: Generally safer but often combined with problematic ingredients 3
  • Tribulus, horny goat weed, fenugreek: Hold 2 weeks - multiple effects including bleeding and glucose concerns 1
  • Ginkgo: Hold 2 weeks - bleeding risk 1

Critical action: Obtain the exact ingredient list from the product label to make a definitive determination

DHEA (Dehydroepiandrosterone)

• Recommendation: Hold 2 weeks before surgery
• Rationale: While DHEA is not explicitly listed in the SPAQI guidelines, the general principle applies: "without a demonstrated benefit, or with a demonstrated lack of harm, there is little downside in temporarily discontinuing an herbal supplement before surgery" 1
• Evidence gaps:
  • No established perioperative safety data 4
  • Insufficient evidence for efficacy in well individuals 4
  • Potential hormonal effects that could interact with surgical stress response
  • Common side effects even in non-surgical contexts 4

Key Clinical Considerations

Timing

• 2-week discontinuation window is standard for most supplements due to:
  • Varying metabolism and uncertain drug clearance 1
  • Time needed to eliminate active metabolites
  • Allows reversal of antiplatelet effects and other physiologic changes

Common Pitfalls to Avoid

1. Assuming patients will volunteer supplement use: Patients often don't consider supplements as "real medications" - you must specifically ask 1
2. Failing to document: In one study, 44% of plastic surgery patients were taking supplements, yet none were documented by surgeons or anesthesiologists 5
3. Accepting vague product names: Generic names like "LibidoStim" don't reveal actual ingredients - demand to see the label 3

If Patient Hasn't Stopped Supplements

• For lower-risk procedures: May cautiously proceed with increased perioperative vigilance 1
• Specific monitoring needed:
  • Enhanced glucose monitoring (if supplement affects glucose metabolism)
  • Increased bleeding awareness (if antiplatelet effects possible)
  • Blood pressure monitoring (for stimulant-containing products)

Documentation Requirements

Document in the medical record:

• Specific supplement names and dosages
• Date of last dose
• Plan for perioperative management
• Patient education provided about discontinuation

The preoperative visit scheduled at least 2 weeks before surgery provides the optimal opportunity for this discussion and allows adequate time for supplement washout 1.