Modified-release dosage forms (Ansel's Pharmaceutical Dosage Forms 11th edition)

modified-release

dosage forms having drug release features based on time, course, or location

delayed release

drugs that are released at a later time other than promptly after administration and are based on the influence of environmental conditions such as gastrointestinal pH

extended release

its goal is to reduce the dosing frequency and release the medication at a controlled manner or a predetermined manner

extended release

usually contains two single doses of medication, immediate release followed by gradual release

repeat action

usually contains two single doses of medication, one for immediate release and the second for delayed release

targeted release

drug release directed toward isolating or concentrating a drug in a body region, tissue, or site of absorption or for drug action

coated beads, granules, and microsphere

an extended release technology where drugs are distributed onto beads, pellets, granules, or other particulate systems

multitablet system

each capsule may contain 8 to 10 minitablets , some uncoated for immediate release and others coted for extended drug release

microencapsulation

a process in which solids, liquids, or even gases may be enclosed in microscopic particles by formation of thin coatings of wall material around the substance

enteric coated tablet

an example of a delayed release tablet