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Related Concept Videos

Transdermal Drug Delivery Systems01:18

Transdermal Drug Delivery Systems

Transdermal drug delivery systems (TDDS) enable the controlled release of drugs across the skin into systemic circulation. They are particularly advantageous for drugs with short half-lives or narrow therapeutic indices, as they maintain consistent plasma concentrations and reduce the risk of subtherapeutic or toxic levels.TDDS are categorized into monolithic, reservoir, and mixed systems. Monolithic systems embed the drug in a polymer matrix, where diffusion governs release. Reservoir systems...
Drug Delivery: Overview01:16

Drug Delivery: Overview

The selection of a drug's delivery route depends upon its physicochemical properties, including lipid or water solubility and ionization, as well as the therapeutic requirement, such as immediate or sustained effect. These routes can be divided into three primary categories: enteral, parenteral, and topical.
Enteral delivery involves administering drugs directly through swallowing, sublingual placement, or buccal application. Orally administered drugs predominantly navigate the gastrointestinal...
Modified-Release Drug Delivery Systems: Influencing Factors01:20

Modified-Release Drug Delivery Systems: Influencing Factors

Modified-release drug delivery systems are designed to optimize the therapeutic effect of drugs by minimizing side effects, reducing the dosage required, and controlling drug release to align with pharmacokinetic and pharmacodynamic needs. The system depends on two key factors: the drug's release from the formulation and its movement through the body to the target site. Unlike conventional dosage forms, where absorption is the limiting step, the rate of drug release is the key determinant in...
Drug Delivery: Miscellaneous Routes01:22

Drug Delivery: Miscellaneous Routes

Drug delivery methods like oral inhalation, nasal sprays, transdermal patches, eye drops, intravitreal injection,  and rectal administration provide localized effects with reduced toxicity.
Oral inhalation and nasal sprays swiftly transfer drugs across the respiratory epithelium's mucosal layer. Inhaled glucocorticoids and bronchodilators directly target lung conditions such as asthma, while fluticasone nasal spray mitigates allergic rhinitis.
Transdermal patches transport drugs through the...
Non-Oral Extravascular Drug Absorption Routes01:15

Non-Oral Extravascular Drug Absorption Routes

Non-oral extravascular routes, which encompass sublingual, buccal, topical, intramuscular, and inhalation methods, primarily utilize passive diffusion to transport drugs into the systemic circulation. The absorption rates and effectiveness of these routes depend on the drug's physicochemical properties, as well as the patient's anatomical and pathophysiological state.
Lipophilic drugs that are stable at salivary pH (6) and exhibit minimal binding to the oral mucosa are absorbed more effectively...
Drug Delivery: Enteral Route01:18

Drug Delivery: Enteral Route

The enteral drug administration involves three primary routes: oral, sublingual, and buccal. Oral ingestion is the most prevalent, safe, economical, and convenient method for drug administration. However, it has certain drawbacks, including limited absorption due to the drug's low water solubility or poor membrane permeability, possible emesis from GI mucosa irritation, destruction of drugs by digestive enzymes or low gastric pH, and irregular absorption along with food or other drugs.
Drugs in...

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Related Experiment Video

Updated: May 26, 2026

Visualizing and Quantifying Pharmaceutical Compounds within Skin using Coherent Raman Scattering Imaging
11:07

Visualizing and Quantifying Pharmaceutical Compounds within Skin using Coherent Raman Scattering Imaging

Published on: November 24, 2021

Practical considerations for optimal transdermal drug delivery.

Cheryl Durand1, Abdullah Alhammad, Kristine C Willett

  • 1Pharmacy Practice, Massachusetts College of Pharmacy and Health Sciences (MCPHS)-Manchester, Manchester, NH, USA [corrected]. cheryl.durand@mcphs.edu

American Journal of Health-System Pharmacy : AJHP : Official Journal of the American Society of Health-System Pharmacists
|January 5, 2012
PubMed
Summary
This summary is machine-generated.

Transdermal drug delivery systems (TDDS) offer benefits but require proper use. Understanding patch types and safety guidelines is crucial for effective medication administration and avoiding potential risks.

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Visualizing and Quantifying Pharmaceutical Compounds within Skin using Coherent Raman Scattering Imaging
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Development, Characterization, and Evaluation of CAGE-based Ionic Liquid Systems for Transdermal Delivery
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Development, Characterization, and Evaluation of CAGE-based Ionic Liquid Systems for Transdermal Delivery

Published on: September 26, 2025

Area of Science:

  • Pharmacology
  • Drug Delivery Systems
  • Patient Safety

Background:

  • Transdermal drug delivery systems (TDDS) provide an alternative administration route with potential advantages.
  • However, benefits can be diminished by incorrect usage or lack of awareness regarding different patch types (reservoir, matrix, drug-in-adhesive).

Purpose of the Study:

  • To review properties of various TDDS products.
  • To provide safety recommendations for patients and caregivers.
  • To guide clinicians in addressing common patient questions about medication patches.

Main Methods:

  • Literature search on commonly used TDDS products in the United States.
  • Supplemental information from package inserts and manufacturer communications.
  • Review of practical considerations for safe and effective TDDS use.

Main Results:

  • Key considerations include patch cutting for dosage adjustment, electrical conductivity of metallic patches, managing adhesion failures, and writing on patches.
  • Clinicians must counsel patients on avoiding external heat sources like sunlight during patch use.
  • Understanding patch properties and manufacturer guidance is essential.

Conclusions:

  • Proper use and awareness of TDDS properties are vital to maximize benefits and ensure safety.
  • Addressing practical issues like patch alteration and adhesion is necessary for effective treatment.
  • Clinicians play a key role in educating patients on safe TDDS practices.