Search results
Results from the WOW.Com Content Network
Lipinski's rule of five, also known as Pfizer's rule of five or simply the rule of five (RO5), is a rule of thumb to evaluate druglikeness or determine if a chemical compound with a certain pharmacological or biological activity has chemical properties and physical properties that would likely make it an orally active drug in humans.
Topical drug delivery (TDD) is a route of drug administration that allows the topical formulation to be delivered across the skin upon application, hence producing a localized effect to treat skin disorders like eczema. [1] [2] The formulation of topical drugs can be classified into corticosteroids, antibiotics, antiseptics, and anti-fungal.
The nasal cavity’s slightly acidic environment and enzymes can affect drug degradation, making delivery systems with neutral to acidic pH ideal. The respiratory region, with its large surface area and high vascularization, is the primary site for drug absorption into systemic circulation.
Multiphasic absorption: Drugs injected intravenously are removed from the plasma through two primary mechanisms: (1) Distribution to body tissues and (2) metabolism + excretion of the drugs. The resulting decrease of the drug's plasma concentration follows a biphasic pattern (see figure). Plasma drug concentration vs time after an IV dose
Drug administration via the nasal cavity yields rapid drug absorption and therapeutic effects. [33] This is because drug absorption through the nasal passages does not go through the gut before entering capillaries situated at tissue cells and then systemic circulation and such absorption route allows transport of drugs into the central nervous ...
Pulmonary drug delivery is mainly utilized for topical applications in the lungs, such as the use of inhaled beta-agonists, corticosteroids and anticholinergic agents for the treatment of asthma and COPD, the use of inhaled mucolytics and antibiotics for the treatment of cystic fibrosis (CT) and respiratory viral infections, [1] and the use of inhaled prostacyclin analogs for the treatment of ...
Intravascular administration does not involve absorption, and there is no loss of drug. [4] The fastest route of absorption is inhalation. [5] Absorption is a primary focus in drug development and medicinal chemistry, since a drug must be absorbed before any medicinal effects can take place. Moreover, the drug's pharmacokinetic profile can be ...
According to the Biopharmaceutics Classification System (BCS) drug substances are classified to four classes upon their solubility and permeability: [1] Class I – high permeability, high solubility. Example: metoprolol, paracetamol [2] Those compounds are well absorbed and their absorption rate is usually higher than excretion.