Dermatological and Transdermal Formulations (Drugs and the Pharmaceutical Sciences)

556 Pages·2002·8.173 MB·English

by  Kenneth A. Walters

Dermatological
and Transdermal
Formulations
edited by
Kenneth A. Walters
An-eX Analytical Services Ltd.
Cardiff, Wales
m
MARCEL
MARCEDL EKKERIN, C. NEWY ORK BASEL
DEKKER
Copyright 2002 by Marcel Dekker, Inc. All Rights Reserved.
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DRUGS AND THE PHARMACEUTICAL SCIENCES
Executive Editor
James Swarbrick
PharmaceuTech, Inc.
Pinehurst, North Carolina
Advisory Board
Larry L. Augsburger David E. Nichols
University of Maryland Purdue University
Baltimore, Maryland West Lafayette, Indiana
Douwe D. Breimer Stephen G. Schulman
Gorlaeus Laboratories University of Florida
Leiden, The Netherlands Gainesville, Florida
Trevor M. Jones Jerome P. Skelly
The Association of the Alexandria, Virginia
British Pharmaceutical Industry
London, United Kingdom
Hans E. Junginger Felix Theeuwes
LeidedAmsterdarn Center Alza Corporation
for Drug Research Palo Alto, California
Leiden. The Netherlands
Vincent H. L. Lee Geoffrey T. Tucker
University of Southern California University of Sheffield
Los Angeles, California Royal Hallamshire Hospital
Sheffield, United Kingdom
Peter G. Welling
lnstitut de Recherche Jouveinal
Fresnes, France
Copyright 2002 by Marcel Dekker, Inc. All Rights Reserved.
DRUGS AND THE PHARMACEUTICAL SCIENCES
A Series of Textbooks and Monographs
1. Pharmacokinetics, Milo Gibaldi and Donald Pern*er
2. Good Manufacturing Practices for Pharmaceuticals: A Plan for Total Quality
Control, Sidney H. Willig, Mumy M. Tuckerman, and William S. Hitchings lV
3. Microencapsulation,e dited by J. R. Nixon
4. Drug Metabolism: Chemical and Biochemical Aspects, Bernard Testa and Peter
Jenner
5. New Drugs: Discovery and Development, edited by Alan A. Rubin
6. Sustained and Controlled Release Drug Delivery Systems, edited by Joseph R.
Robinson
7. Modem Pharmaceutics, edited by Gilbert S. Banker and Christopher T. Rhodes
8. Prescription Drugs in Short Supply: Case Histories, Michael A. Schwartz
9. Activated Charcoal: Antidotal and Other Medical Uses, David 0. Cooney
10. Concepts in Drug Metabolism (in two parts), edited by Peter Jenner and Bernard
Testa
11. Pharmaceutical Analysis: Modern Methods (in two parts), edited by James W.
Munson
12. Techniques of Solubilization of Drugs, edited by Samuel H. Yalkowsky
13. Orphan Drugs, edited by Fred €. Karch
14. Novel Drug Delivery Systems: Fundamentals, Developmental Concepts,
Biomedical Assessments, Yie W. Chien
15. Pharmacokinetics: Second Edition, Revised and Expanded, Milo Gibaldi and
Donald Penier
16. Good Manufacturing Practices for Pharmaceuticals: A Plan for Total Quality
Control, Second Edition, Revised and Expanded, Sidney H. Willig, Murray M.
Tuckerman, and William S. Hitchings IV
17. Formulation of Veterinary Dosage Forms, edited by Jack Blodinger
18. Dermatological Formulations: Percutaneous Absorption, Brian W. Barry
19. The Clinical Research Process in the Pharmaceutical Industry, edited by Gary
M. Matoren
20. Microencapsulationa nd Related Drug Processes, Patrick B. Deasy
21. Drugs and Nutrients: The Interactive Effects, edited by Daphne A. Roe and T.
Colin Campbell
22. Biotechnology of Industrial Antibiotics, €rick J. Vandamme
23. Pharmaceutical Process Validation, edited by Bernard T. Loflus and Robert A.
Nash
24. Anticancer and Interferon Agents: Synthesis and Properties, edited by Raphael
M. Offenbrite and George B. Butler
25. PharmaceuticalS tatistics: Practical and Clinical Applications, Sanford Bolton
26. Drug Dynamics for Analytical, Clinical, and Biological Chemists, Benjamin J.
Gudzinowicz, Burrows T. Younkin, Jr., and Michael J. Gudzinowicz
27. Modern Analysis of Antibiotics, edited by Adjoran Aszalos
28. Solubility and Related Properties, Kenneth C. James
29. Controlled Drug Delivery: Fundamentals and Applications, Second Edition,
Revised and Expanded, edited by Joseph R. Robinson and Vincent Lee
30. New Drug Approval Process: Clinical and Regulatory Management, edited by
Richard A. Guarino
Copyright 2002 by Marcel Dekker, Inc. All Rights Reserved.
31. Transdermal Controlled Systemic Medications, edited by Yie W. Chien
32. Drug Delivery Devices: Fundamentals and Applications, edited by Praveen Tyle
33. Pharmacokinetics: Regulatory Industrial Academic Perspectives, edited by
Peter G. Welling and Francis L. S. Tse
34. Clinical Drug Trials and Tribulations, edited by Allen E. Cato
35. Transdermal Drug Delivery: Developmental Issues and Research Initiatives,
edited by Jonathan Hadgrat? and Richard H. Guy
36. Aqueous Polymeric Coatings for Pharmaceutical Dosage Forms, edited by
James W. McGinity
37. Pharmaceutical Pelletization Technology, edited by lsaac Ghebre-Sellassie
38. Good Laboratory Practice Regulations, edited by Allen F. Hirsch
39. Nasal Systemic Drug Delivery, We W. Chien, Kenneth S. E. Su, and Shyi-Feu
Chang
40. Modern Pharmaceutics: Second Edition, Revised and Expanded, edited by
Gilbert S. Banker and Christopher T. Rhodes
41 . Specialized Drug Delivery Systems: Manufacturing and Production Technology,
edited by Praveen Tyle
42. Topical Drug Delivery Formulations, edited by David W. Osborne and Anton H.
Amann
43. Drug Stability: Principles and Practices, Jens T. Carstensen
44. Pharmaceutical Statistics: Practical and Clinical Applications, Second Edition,
Revised and Expanded, Sanford Bolton
45. Biodegradable Polymers as Drug Delivery Systems, edited by Mark Chasin and
Robert Langer
46. Preclinical Drug Disposition: A Laboratory Handbook, Francis L. S. Tse and
James J. Jaffe
47. HPLC in the Pharmaceutical Industry, edited by Godwin W. Fong and Stanley K.
Lam
48. Pharmaceutical Bioequivalence, edited by Peter G. Welling, Francis L. S. Tse,
and Shrikant V. Dinghe
49. Pharmaceutical Dissolution Testing, Umesh V. Banakar
50. Novel Drug Delivery Systems: Second Edition, Revised and Expanded, Yie W.
Chien
51. Managing the Clinical Drug Development Process, David M. Cocchefto and
Ronald V. Nardi
52. Good Manufacturing Practices for Pharmaceuticals: A Plan for Total Quality
Control, Third Edition, edited by Sidney H. Willig and James R. Stoker
53. Prodrugs: Topical and Ocular Drug Delivery, edited by Kenneth B. Sloan
54. Pharmaceutical Inhalation Aerosol Technology, edited by Anthony J. Hickey
55. Radiopharmaceuticals: Chemistry and Pharmacology, edited by Adrian D. Nunn
56. New Drug Approval Process: Second Edition, Revised and Expanded, edited by
Richard A. Guarino
57. Pharmaceutical Process Validation: Second Edition, Revised and Expanded,
edited by Ira R. Berry and Robert A. Nash
58. Ophthalmic Drug Delivery Systems, edited by Ashim K. Mitra
59. Pharmaceutical Skin Penetration Enhancement, edited by Kenneth A. Walters
and Jonathan Hadgraft
60. Colonic Drug Absorption and Metabolism, edited by Peter R. Bieck
61 . Pharmaceutical Particulate Carriers: Therapeutic Applications, edited by Alain
Rollan d
62. Drug Permeation Enhancement: Theory and Applications, edited by Dean S.
Hsieh
63. Glycopeptide Antibiotics, edited by Ramakrishnan Nagarajan
64. Achieving Sterility in Medical and Pharmaceutical Products, Nigel A. Halls
65. Multiparticulate Oral Drug Delivery, edited by lsaac Ghebre-Sellassie
Copyright 2002 by Marcel Dekker, Inc. All Rights Reserved.
66. Colloidal Drug Delivery Systems, edifed by Jorg Kreufer
67. Pharmacokinetics: Regulatory Industrial Academic Perspectives, Second
Edition, edifed by Peter G. Welling and Francis L. S. Tse
68. Drug Stability: Principles and Practices, Second Edition, Revised and Expanded,
Jens T. Carsfensen
69. Good Laboratory Practice Regulations: Second Edition, Revised and Expanded,
edited by Sandy Weinberg
70. Physical Characterization of Pharmaceutical Solids, edifed by Harry G. Briffain
71. Pharmaceutical Powder Compaction Technology, edited by Goran Alderbom
and Chrisfer Nysfrom
72. Modern Pharrnaceutics: Third Edition, Revised and Expanded, edited by Gilbert
S. Banker and Christopher T. Rhodes
73. Microencapsulation: Methods and Industrial Applications, edited by Simon
Benifa
74. Oral Mucosal Drug Delivery, edited by Michael J. Rafhbone
75. Clinical Research in Pharmaceutical Development, edited by Barry Bleidt and
Michael Monfagne
76. The Drug Development Process: Increasing Efficiency and Cost-Effectiveness,
edited by Peter G. Welling, Louis Lasagna, and Umesh V. Banakar
77. Microparticulate Systems for the Delivery of Proteins and Vaccines, edited by
Smadar Cohen and Howard Bemsfein
78. Good Manufacturing Practices for Pharmaceuticals: A Plan for Total Quality
Control, Fourth Edition, Revised and Expanded, Sidney H. Willig and James R.
Stoker
79. Aqueous Polymeric Coatings for Pharmaceutical Dosage Forms: Second Edition,
Revised and Expanded, edited by James W. McGinify
80. Pharmaceutical Statistics: Practical and Clinical Applications, Third Edition,
Sanford Bolfon
81. Handbook of Pharmaceutical Granulation Technology, edited by Dilip M. Parikh
82. Biotechnology of Antibiotics: Second Edition, Revised and Expanded, edited by
William R. Sfrohl
83. Mechanisms of Transdermal Drug Delivery, edifed by Russell 0. Poffs and
Richard H. Guy
84. Pharmaceutical Enzymes, edifed by Albert Lauwers and Simon Scharpe
85. Development of Biopharmaceutical Parenteral Dosage Forms, edifed by John A.
Bonfempo
86. Pharmaceutical Project Management, edited by Tony Kennedy
87. Drug Products for Clinical Trials: An International Guide to Formulation
0
Production Quality Control, edifed by Donald C. Monkhouse and Christopher T.
0
Rhodes
88. Development and Formulation of Veterinary Dosage Forms: Second Edition,
Revised and Expanded, edifed by Gregory E. Hardee and J. Desmond Baggof
89. Receptor-Based Drug Design, edifed by Paul Let7
90. Automation and Validation of Information in Pharmaceutical Processing, edited
by Joseph F. deSpautz
91. Dermal Absorption and Toxicity Assessment, edited by Michael S. Roberts and
Kenneth A. Walfers
92. Pharmaceutical Experimental Design, Garefh A. Lewis, Didier Mafhieu, and
Roger Phan-Tan-Luu
93. Preparing for FDA Pre-Approval Inspections, edited by Martin D. Hynes lllv
94. Pharmaceutical Excipients: Characterization by IR, Raman, and NMR
Spectroscopy, David E. Bugay and W. Paul Findlay
95. Polymorphism in Pharmaceutical Solids, edifed by Harry G. Briffain
96. Freeze-Drying/Lyophilizationo f Pharmaceutical and Biological Products, edifed
by Louis Rey and Joan C. May
Copyright 2002 by Marcel Dekker, Inc. All Rights Reserved.
97. Percutaneous Absorption: Drugs-Cosmetics-Mechanisms-Methodology,
Third Edition, Revised and Expanded, edited by Robert L. Bronaugh and
Howard 1. Maibach
98. Bioadhesive Drug Delivery Systems: Fundamentals, Novel Approaches, and
Development, edited by Edith Mathiowitz, Donald E. Chickering 111, and Claus-
Michael Lehr
99. Protein Formulation and Delivery, edited by Eugene J. McNally
100. New Drug Approval Process: Third Edition: The Global Challenge, edited by
Richard A. Guarino
101. Peptide and Protein Drug Analysis, edited by Ronald E. Reid
102. Transport Processes in Pharmaceutical Systems, edited by Gordon Amidon,
Ping 1. Lee, and Elizabeth M. Topp
103. Excipient Toxicity and Safety, edited by Myra L. Weiner and Lois A. Kotkoskie
104. The Clinical Audit in Pharmaceutical Development, edited by Michael R.
Hamrell
105. Pharmaceutical Emulsions and Suspensions, edited by Francoise Nielloud
and Gilberfe Marfi-Mestres
106. Oral Drug Absorption: Prediction and Assessment, edited by Jennifer B.
Dressman and Hans Lennernas
107. Drug Stability: Principles and Practices, Third Edition, Revised and Expanded,
edited by Jens T. Carstensen and C. T. Rhodes
108. Containment in the Pharmaceutical Industry, edited by James Wood
109. Good Manufacturing Practices for Pharmaceuticals: Fifth Edition, Revised and
Expanded, Sidney H. Willig
110. Advanced Pharmaceutical Solids, Jens T. Carstensen
111. Endotoxins: Pyrogens, LAL Testing, and Depyrogenation, Second Edition,
Revised and Expanded, Kevin L. Williams
112. Pharmaceutical Process Engineering, Anthony J. Hickey and David Gander-
ton
113. Pharmacogenics, edited by Werner Kalow, Urs A. Meyer, and Rachel F.
Tyndale
114. Handbook of Drug Screening, edited by Rarnakrishna Seefhala and Prab-
havathi B. Fernandes
115. Drug Targeting Technology: Physical Chemical Biological Methods, edited
by Hans Schreier
116. Drug-Drug Interactions, edited by A. David Rodrigues
117. Handbook of Pharmaceutical Analysis, edited by Lena Ohannesian and
Anthony J. Streeter
118. Pharmaceutical Process Scale-Up, edited by Michael Levin
119. Dermatological and Transdermal Formulations, edited by Kenneth A. Walters
120. Clinical Drug Trials and Tribulations: Second Edition, Revised and Expanded,
edited by Allen Cato, Lynda Suffon, and Allen Cato 111
ADDITIONAL VOLUMES IN PREPARATION
Modern Pharmaceutics: Fourth Edition, Revised and Expanded, edited by
Gilberf S. Banker and Christopher T. Rhodes
Surfactants and Polymers in Drug Delivery, Marfin Malmsten
Copyright 2002 by Marcel Dekker, Inc. All Rights Reserved.
Preface
Thepasttwodecadeshavewitnessedbrilliantdiscoveriesregardingthestructureandfunc-
tions of the stratum corneum.
—Albert Kligman, 2000
An immense amount of research has been carried out over the past two decades on
the micromorphology of the skin, in particular of the stratum corneum, and the
important role that this organ plays in the maintenance of human life. It has also
been nearly two decades since thepublicationofBrianBarry’sbookDermatological
Formulations—PercutaneousAbsorption.Thisbookremainsoneofthemostwidely
and frequently cited references in the field of skin transport and also has been used
extensively as an introduction to the complexities surrounding the theory and de-
velopment of topical pharmaceutical products.
The introduction and subsequent success of transdermal therapeutic systems
have advanced our understanding of the structure of the skin and the mechanisms
of transport through the barrier membrane. In addition, technological developments
in molecular biology and pharmacology have led to an increased understanding of
the biochemistry of skin diseases. The result is the introduction of new therapeutic
strategiesthatusebothexistingandnewchemicalentitiestotreatskindiseases.This
volumeservesasausefuladditiontotheliteratureinthedermatopharmaceuticsfield.
The rational treatment of skin diseases, based on the biochemical mechanisms
underlying the pathology, is discussed in Chapter 2. For example, vitamin D deriv-
3
atives, such as calcipotriol and calcitriol, have recently been introduced as topical
therapeutic modalities for the treatment of psoriasis. This is a result of the finding
Copyright 2002 by Marcel Dekker, Inc. All Rights Reserved.
Preface
that some compounds of this type possess a high binding affinity to specific cellular
receptors and are potent regulators of cell differentiation and inhibitors of cell pro-
liferationinhumankeratinocytes.Cosmeticscientistshavelongknowntheepidermal
advantages of another vitamin, retinol (vitamin A). Deficiency of this vitamin has
been implicated in squamous metaplasia and keratinization of epithelial tissue, and
several derivatives have been synthesized and evaluated for their effects in such
diseases as acne, psoriasis, and hyperkeratosis. The results have been somewhat
variable; however, the recent identification of several receptor proteins for retinoic
acid should lead to the development of more potent analogs with fewer side effects.
The ability to enhance skin penetration and permeation has been the subjectof
considerable research over the past two decades and is reviewed in Chapter 6. The
science of penetration enhancement has expanded considerably over the past few
years, and it is now possible to increase drug delivery across the skin using both
chemical and physical means. Various synthetic (e.g., SEPA(cid:2) andAzone(cid:2)) and nat-
ural (e.g., terpenes) compounds have proved useful in this respect. Moreover, there
is evidence that the skin penetration of large molecules such as insulin can be in-
creased using physical methods of enhancement, such as iontophoresis.
The use of the skin as a drug delivery route for both topical and systemic
therapy is covered in Chapter 7. Transdermal drug delivery using patches or semi-
solid formulations is now a reality with products available for travel sickness, hy-
pertension, angina, postmenopausal symptoms, male hypogonadism, pain, inflam-
mation, and smoking cessation. Problems of irritation are being overcome with the
development of skin-compatible materials, such as some of the newer pressure-sen-
sitive adhesives. The success of such systems has been achieved only by means of
a greater understanding of the physical and biochemical nature of the permeation
routes through the skin, especially in relation to the intercellular lipid lamellae of
the stratum corneum (as discussed in Chapters 1, 3, and 4). In addition, themethods
of studying percutaneous absorption, both in vivo and in vitro, have become more
standardized thanks to the efforts of the American Association of Pharmaceutical
Scientists (AAPS), the U.S. Food and DrugAdministration (FDA), and other indus-
trial and regulatory bodies. Chapter 5 provides a complete description of theAAPS/
FDA guidelines for such experimentation, together with a full evaluation of the in
vivo tape-stripping procedure. This chapter also gives a description of the use of
cultured skin membranes for the study of irritation and other toxic responses to
materials applied to the skin.
The formulation of dermatological vehicles has become more innovative with
the introduction of many new excipient materials and the development of delivery
systems made up of vesicles such as liposomes and niosomes. These are discussed
in Chapters 6 and 7.As an example, the feasibility of using supersaturatedsolutions
as vehicles for improving dermal drug delivery has been established. This type of
strategy will undoubtedly reduce the amount of drug necessary for a therapeutic
effect, which should result in fewer local side effects and a lower incidence of
unwanted systemic effects. The use of liposomes and niosomes in cosmetic formu-
lation is reputed to impart beneficial properties to such products as moisturizers.
Although these types of vesicles can be useful in the targeting of pharmaceutical
agents to epidermal sites of action, their usefulness in transporting drugs across the
skin to systemic sites has yet to be fully established. The usefulness of multivariate
optimization in the scale-up of dermatological dosage forms is discussed in Chapter
Copyright 2002 by Marcel Dekker, Inc. All Rights Reserved.
Preface
9. Chapter 8 covers bioequivalence of dermal and transdermal systems. Safety con-
siderations are outlined in Chapters 10 and 11.
This book will be useful to pharmacy students and practitioners and cosmetic
and veterinary scientists. It may also prove useful to toxicologists working in the
field of risk assessment and dermatologists requiring a deeper understanding of the
mechanisms of drug transport through the skin. The chapters have been authored by
international experts in their fields and provide a comprehensive review of current
dermatopharmaceutics.
I acknowledge, and am extremely grateful for, the hard work and infinite pa-
tience shown by the contributors to this volume. I would also like to acknowledge
the unreserved help provided by my colleague Dr. Keith Brain. Finally, since the
written word cannot fully express my love and gratitude to Peggy for her support
and encouragement during many hours of word processing and reference hunting,
this absentee husband will find other ways.
Kenneth A. Walters
Copyright 2002 by Marcel Dekker, Inc. All Rights Reserved.