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Dosage Regimen: Multiple Oral Dosage01:25

Dosage Regimen: Multiple Oral Dosage

Understanding how a drug's concentration fluctuates within the body over time is crucial in pharmacokinetics, particularly with multiple oral doses. A graphical representation of multiple oral dosages provides insight into these dynamics. Typical accumulation curves of a drug's concentration in the body reveal a sawtooth pattern, indicating periodic peaks and troughs correlating with each dose administration and the drug's subsequent elimination.The plasma concentration at any time during an...
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Dosage Regimens: Partial Pharmacokinetic Parameters

It is not uncommon for complete drug pharmacokinetic profiles to remain elusive in pharmacokinetics. This necessitates certain educated assumptions by pharmacokineticists to determine appropriate dosage regimens without comprehensive pharmacokinetic data from animal or human studies. One prevalent assumption is setting the bioavailability factor, denoted as F, to 1 or 100%. This assumption caters to the scenario where a drug doesn't achieve full systemic absorption, resulting in the patient...
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Dosage Regimen: Fixed Dose

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A loading dose is an essential pharmacological strategy to rapidly achieve the target plasma drug concentration necessary for an immediate therapeutic effect. This approach is especially critical for drugs characterized by slow absorption or extended half-lives, where delaying therapeutic plasma levels could compromise treatment outcomes. By administering a loading dose, clinicians ensure a prompt onset of drug action, even for agents with complex pharmacokinetic profiles.Achieving steady-state...
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For drugs producing a quantal response, onset occurs when plasma concentration reaches a minimum effective level (Cmin). The drug's action duration depends on how long the plasma concentration remains above Cmin.Two primary factors influence this duration: dose size and the rate of drug removal from the action site. Both depend on the drug's redistribution to poorly perfused tissues and elimination processes. A larger dose promotes rapid onset and prolongs the effect's duration.Consider a...
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Dose patterns among patients using low-dose buprenorphine patches.

Eva Lesén1, Lisa Ericson, Christian Simonsberg

  • 1Nordic Health Economics AB, Gothenburg, Sweden.

Pain Medicine (Malden, Mass.)
|May 23, 2013
PubMed
Summary

Low-dose buprenorphine patches showed a small average dose increase of 4 μg/h over 260 days in Swedish patients. This minimal change suggests no development of tolerance or dependence/addiction.

Keywords:
BuprenorphineDose PatternsDrug UtilizationOpioid-Related DisordersToleranceTransdermal

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Area of Science:

  • Pharmacology
  • Clinical Practice
  • Pain Management

Background:

  • Low-dose buprenorphine patches are used in clinical practice.
  • Understanding dose patterns is crucial for assessing treatment efficacy and safety.
  • Potential for tolerance or dependence/addiction needs investigation.

Purpose of the Study:

  • To investigate the dose pattern of low-dose buprenorphine patches in Swedish clinical practice.
  • To evaluate dose changes over time in relation to tolerance and dependence/addiction.
  • To analyze dose adjustments in a real-world setting.

Main Methods:

  • Nationwide, observational study using the Swedish Prescribed Drug Register.
  • Included patients on continuous low-dose buprenorphine patches for over 24 weeks (July 2005–February 2011).
  • Analyzed dose changes from baseline to 8-week intervals and the final treatment period.

Main Results:

  • Majority of patients were female (74%) and elderly (≥75 years, 69%).
  • Median treatment duration was 260 days; 4% and 1% treated for 2 and 3 years, respectively.
  • Average dose increased by 4 μg/h from baseline (11 μg/h) to the last treatment period (15 μg/h).

Conclusions:

  • The average dose increase of 4 μg/h over 260 days is clinically low.
  • This dose pattern does not indicate dependence/addiction.
  • Low long-term treatment continuation rates further support the absence of dependence/addiction.