Transdermal Drug Delivery System

Author(s):  
Syeda Ayesha Fathima ◽  
Shireen Begum ◽  
Syeda Saniya Fatima

Conventional dosage forms which require multidose therapy have many problems and complications. Design of a conventional dosage forms should be such that it delivers right amount of drug in right manner to the target site. The encouragement in development of novel drug delivery system is apart from therapeutic efficacy is its cause. Redesigning the unit and means is a difficult task and profitable task so a controlled released drug delivery system, a novel drug delivery system evolves which facilitates the release of drug at predetermined rate. Controlled drug delivery can be achieved by transdermal drug delivery system which can deliver the drug through skin to the systemic circulation at a predetermine rate over a prolonged period of time.

Author(s):  
Reshmi Jayaprakash ◽  
Jahnara Hameed ◽  
Anupriya Anupriya

Recently, most widely using conventional dosage form such as tablet, capsules, and injections but due to some case we are preferable to choose transdermal drug delivery system (TDDS) because conventional oral dosage form undergo first pass metabolism. In TDDS, skin is the effective medium for the penetration of drug into systemic circulation. This system required very low dose for the effective result or action. One of the major disadvantages of TDDS is penetration rate is very low through the stratum corneum. Nowadays, different types of skin penetration enhancement techniques are used for increasing the penetration. These types of techniques can be also increase the bioavailability. The patients have more preferable to choose this type of drug delivery system because it has more advantages than conventional dosage form. This article is discuses about the anatomy and physiology of skin and its drug penetration capacity, polymers used in transdermal drug delivery and different types of TDDS.


Author(s):  
Lakshmi Usha Ayalasomayajula ◽  
M. Kusuma Kumari ◽  
Radha Rani Earle

In the recent days about 75% of the drugs taken orally are does not show the desired therapeutic effect. Oral conventional dosage forms have several disadvantages such as poor bioavailability due to hepatic first pass metabolism and tendency to produce rapid blood level spikes (Both high and low). Thus, rapid drug levels in the plasma leads to a need of high and/or frequent dosing, which can be both uneconomical and inconvenient. To overcome such disadvantages transdermal drug delivery system was developed. TDDS is such a delivery system which has been explored extensively over the last two decades, with therapeutic success. Transdermal drug delivery systems (TDDS) are the drug delivery systems which involves transportation of drug to epidermal and dermal tissues of the skin for local therapeutic action while major fraction of the drug is transported into the systemic blood circulation. Topical administration of therapeutic agents offers vast advantages over conventional oral and invasive methods of drug delivery. Some of the advantages of transdermal drug delivery include limitation of hepatic first pass metabolism, enhancement of therapeutic efficiency and maintenance of steady state plasma level concentration of the drug. This study includes a brief overview of TDDS, its advantages over conventional dosage forms, drug delivery routes across human skin, permeation enhancers, and classification, formulation, methods of preparation and evaluation of transdermal patches.


2015 ◽  
Vol 1 (6) ◽  
pp. 244 ◽  
Author(s):  
Audumbar Digambar Mali ◽  
Ritesh Bathe ◽  
Manojkumar Patil

Transdermal drug delivery systems (TDDS), also known as patches, are dosage forms designed to deliver a therapeutically effective amount of drug across a patients skin. In order to deliver therapeutic agents through the human skin for systemic effects, the comprehensive morphological, biophysical and physicochemical properties of the skin are to be considered. Transdermal delivery provides a leading edge over injectables and oral routes by increasing patient compliance and avoiding first pass metabolism respectively. Transdermal delivery not only provides controlled, constant administration of the drug, but also allows continuous input of drugs with short biological half-lives and eliminates pulsed entry into systemic circulation, which often causes undesirable side effects. The TDDS review articles provide valuable information regarding the transdermal drug delivery systems and its evaluation process details as a ready reference for the research scientist who is involved in TDDS. With the advancement in technology Pharma industries have trendified all its resources. Earlier we use convectional dosage form but now we use novel drug delivery system. One of greatest innovation of novel drug delivery is transdermal patch. The advantage of transdermal drug delivery system is that it is painless technique of administration of drugs.


2020 ◽  
Vol 11 (SPL4) ◽  
pp. 1341-1349
Author(s):  
Yap Vi Lien ◽  
Mogana R ◽  
Sasikala Chinnappan ◽  
Ashok Kumar Janakiraman ◽  
Tan Lee Fang

Hyperpigmentation is one of the most commonly seen skin disorders which is not a concerning health issues but it may affect the psychological aspect of a person. Hyperpigmentation is caused by the presence of excess melanin, which is the brown pigment of the skin. Products that aimed to reduce the pigmentations act by inhibiting the tyrosinase enzyme, which is the rate-limiting enzyme in the synthesis of melanin. There are many products that are currently available in the market that aims to reduce pigmentation of the skin. These products are conventionally formulated into different dosage forms such as cream, lotion and emulgel, which gains popularity due to its convenience on application. However, due to the drawbacks that these dosage forms possess such as poor stability and absorption, new formulations are presented which incorporate novel drug delivery system into the conventional dosage forms. These novel drug delivery systems are, inter alia, liposome, niosomes and microsphere. They carry benefits of controlled drug delivery, enhanced skin penetration and reduce drug toxicity as compared to the conventional dosage form, which resulted in the increase in marketed product diving into this pathway. This present article will discuss the various dosage forms, drug delivery system, its advantages, disadvantages and marketed product for pigmentation control.


2021 ◽  
Vol 11 (2) ◽  
pp. 113-120
Author(s):  
Neha Sharma ◽  
Tarun Kumar Sharma ◽  
Vinay Pandit ◽  
M. S Ashawat

Transdermal drug delivery system used to transport the drug across the skin deep into systemic circulation. The main advantages of Transdermal drug delivery system improved patient compliance, sustained release, avoidance of gastric irritation, as well as elimination of pre-systemic first-pass effect. But most of therapeutic agents is limited due to thickness of stratum corneum, which act as a barrier for the delivery of various drug molecules and only few molecules are able to reach the action site. Microneedles are the new form of delivery system, which are used to increase the delivery of drug through this route and overcoming the number of problems related to conventional drug delivery system the main aim of this review to focus on new innovation in transdermal drug delivery systems. In the microneedle drug delivery system, the skin is temporarily broken, that creating micron size pathways that deliver the sufficient amount of drug directly into the stratum corneum from which the drug can directly go into the systemic circulation. In this review, we describe different type of microneedles can be solid, coated, dissolving and biodegradable microneedles and their method of fabrication. Microneedles can be manufactured in different forms like hollow, solid, and dissolving. Also describe materials used for fabrication, fabrication techniques, methodology of drug delivery such as Poke and patch, Coat and poke, Poke and release, Poke and flow and evaluation parameters.


2018 ◽  
Vol 8 (5-s) ◽  
pp. 62-66 ◽  
Author(s):  
Anupriya Kapoor ◽  
Shashi Kiran Mishra ◽  
Dharmesh Kumar Verma ◽  
Prashant Pandey

In present scenario more than 70% of the drugs that are taken by oral route are found to be less effective as desired, to overcome this constraint Transdermal drug delivery system has emerged as an innovative area of research, this system helps in delivering the drugs and macromolecules through skin into systemic circulation. At present, the worldwide market of Transdermal patch has reached 2 billion pounds. Many drugs like Estrogen, Progestrone, Nitroglycerine, Clonodine etc. are fabricated in form of Transdermal patches due to its ability to deliver the drug in non-invasive manner and also to overcome the problems associated with oral route. Although the Transdermal patches deliver the drug at predetermined rate1, the partitioning of drug from the system to the skin and then penetration through different layers of skin can be altered by adding penetration enhancers that can be physical or chemical in nature. This article deals with the role of different chemicals that can be used as penetration enhancer. Keywords: Penetration enhancer, Layer of skin, Fatty alcohol and glycol


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