Drug Delivery System relates to the production of a drug, its delivery medium, and the way of administration.

Certain common drug delivery mediums are Artificial and organic polymers along with other chemical concepts, which are capable to release the drugs at a persistent rate or only in specific environment, and Liposomes.

Drug delivery systems are even used for administering nitroglycerin. In addition, it is also used in nicotine patches thereby helping people to cease and withdraw tobacco consumption.

Transdermal Drug Delivery:

This drug delivery system is available since many years. Previously, the most frequently systems for applications were topical ointments and creams for various dermatological disorders. Here, various drugs are applied to your skin for providing systemic treatment.

This system comprises of various topically monitored drug formulations that have the ability for delivering active components into general circulation. This system is formulated for providing controlled uninterrupted drug delivery through skin for systemic circulation and distribution in the body.

Due to the relative and impermeability property of skin, transdermal drug delivery system doubles the protection barricade to avert intrusion by microbes and prevents loss of physiological substances including water.

Four transdermal drug delivery systems that efficiently absorb drugs in the skin are as follows:

1. Micro sealed system

2. Matrix-diffusion controlled system

3. Membrane-permeation controlled system

4. Gradient-charged system

Pulmonary Drug Delivery:

Pulmonary drug delivery system is used for delivering drugs to treat respiratory disorders. Lungs have large surface region of alveoli having productive capillary network, which provides good absorbing surface to administer and monitor pulmonary drugs. Speedy action and greater efficiency have led pulmonary drug delivery system to treat COPD (chronic obstructive pulmonary disease) and asthma.

The main principle behind this drug delivery system is aerosolization, which means reduction in the size of drug particles delivered to alveoli and bronchioles.

Pulmonary delivery systems come in many varieties such as nebulizer machines and handheld inhalers. As health condition in each patient varies, thus depending upon the age and other conditions, there are various kinds of pulmonary drug delivery systems that work effectively.

Pulmonary drug delivery system proffers the capability for non-persistent administration of large variety of super-molecules.