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Publications (3)15.13 Total impact

  • E Douglas Kramer · Nabarun Dasgupta · C C Lim · S H Lee · Y.C. Wong · F Hui

    No preview · Article · Mar 2010 · Neurology
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    ABSTRACT: There is a demand for pharmaceutical products with reduced abuse liability. These products must meet three tests to be successful. They must be safe for patients, be less likely to injure the abuser, and be less desirable for abuse by established drug abusers relative to existing products on a dose for dose (milligram-equivalent) basis. There is a need for standardization of the evaluation of abusable pharmaceuticals in the various stages of drug development from preclinical animal studies to postmarketing surveillance. Formulations with reduced abuse liability must: (1) be tested using standard animal, benchtop, and human pharmacokinetic methods that allow interpretation, (2) sufficiently reduce the recovery of abusable drug substance, or contain another ingredient to deter abuse, (3) not alter drug activity for patients in an undesirable or risky way, and (4) have an accurate pre-approval estimation of their reduced abuse liability, which is validated by adequate epidemiologic post-approval surveillance.
    No preview · Article · Jul 2006 · Drug and Alcohol Dependence
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    ABSTRACT: Understanding and managing prescription opioid abuse is one of the major challenges in pain management worldwide. The relationships between prescriptive usage of opioids and reported morbidity at the national level, using data from the Drug Abuse Warning Network (DAWN), were examined. When the major prescription opioids were evaluated, the association between prescriptive medical use in kilograms and reported morbidity, as measured by a ratio between the two, was similar for the intermediate-potency opioids (hydrocodone, methadone, oxycodone, and morphine). This rate was much lower for low-potency opioids (codeine, meperidine, pentazocine, and propoxyphene) and much greater for high-potency opioids (hydromorphone and fentanyl). When the drugs were adjusted by potency (relative to morphine), the rates of reported morbidity per kilogram of morphine equivalent opioid in prescriptive usage were similar among the opioids. Using the potency-adjusted total kilograms of opioid in prescriptive use for all the opioids evaluated, there was a statistically significant association (r(2)=0.9791) with the reported morbidity for prescription analgesics as a class, as measured in the DAWN system. These data suggest that non-medical use of opioids is predictable based on potency and extent of prescriptive use.
    No preview · Article · May 2006 · Drug and Alcohol Dependence