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Clinical interactions & pharmacogenomics

Drug interaction checker

Enter up to four medications. The tool checks every pair against a curated library sourced from FDA labels and CPIC Guidelines, and flags pharmacogenomic differences that matter for Black patients (CYP2C19, CYP2D6, VKORC1, ADRB2).

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Data sources: FDA labels, CPIC Guidelines, ACC/AHA & ADA guidelines.

Pharmacogenomics for Black patients (1)

  • Tramadol

    CYP2D6

    Tramadol requires CYP2D6 to convert to its active metabolite (M1). Ultra-rapid metabolizers (more common in some African populations, up to 29% in specific Ethiopian groups) can produce dangerously high opioid levels — several FDA safety alerts cover postoperative fatalities in both adults and breastfeeding infants.

    What this means for Black patients: Ask whether genotype testing is available before using tramadol long-term, and avoid in breastfeeding mothers. Alternative analgesics (acetaminophen, ibuprofen short-course, gabapentin) should usually be tried first.

    Source: FDA Drug Safety Communication 2017. CPIC CYP2D6 + Opioid Guideline 2021.

Always talk to your pharmacist. This tool is educational and only surfaces interactions we can cite. Pharmacy software checks every combination in your full medication regimen against continually-updated databases like Lexicomp and Micromedex, use this tool to sharpen the questions you bring to that conversation, not to replace it.

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