classification of dosage forms based on route of administration
Apparatus No. It is mostly used for the neutral drugs. Reinforcement refers to the addition of undiluted chemical product to the dip without the addition of water, whereas topping-up refers to the addition of water and undiluted chemical product to the dip vat to return the volume to the starting level. The density, particle size, and geometry of the premix particles should match as closely as possible those of the feed in which the premix will be incorporated to facilitate uniform mixing. Liquid formulations deliver medication in a fluid and may be poured from a bottle or vial; solid medication dosage forms hold their original shape. A tincture for topical application uses a vehicle containing 15%–80% alcohol, requiring the preparation to be tightly stoppered and not exposed to high temperatures. Powders have also been formulated with emulsifying agents to facilitate their administration as liquid drenches. A large number of new dosage forms have appeared since that time and it was considered that revision of the system was required in order that a unified, worldwide classification could be developed. Physicians have broad pre-scribing authority, which means there are no limitations to what prescription products they may prescribe. Some pour-on products on the market are formulated to deliver an active ingredient percutaneously. The slower release of drug from an oily suspension compared with that of an aqueous suspension is attributed to the additional time taken by drug particles suspended in an oil depot to reach the oil/water boundary and become wetted before dissolving in tissue fluids. a. After dilution, an emulsifiable concentrate for topical use produces a two-phase system involving two immiscible liquids, a dispersed phase, consisting of fine oil droplets ranging in size from 0.5 μm to several hundred microns, and a continuous phase. An emulsion for injection is a heterogeneous dispersion of one immiscible liquid in another; it relies on an emulsifying agent for stability. Compared with solid dosage forms, solutions are absorbed faster and generally cause less irritation of the GI mucosa. A range of excipients may be included in parenteral solutions, including antioxidants, antimicrobial agents, buffers, chelating agents, inert gases, and substances to adjust tonicity. However, a nonaqueous solvent or a mixed aqueous/nonaqueous solvent system may be necessary to stabilize drugs that are readily hydrolyzed by water or to improve solubility. Eugenol is present in A. Tulsi B. Fennel C. Cardamom D. Coriander 2. Bloat, or ruminal tympany, refers to excessive accumulation of gas in the rumen. The particle size of the active ingredient in pastes can be as large as 100 μm. They are administered to poultry, pigs, and ruminants. The efficacious systemic concentrations attained with these preparations result from the animal's licking behavior and, to a lesser extent, percutaneous absorption of the active ingredient. Particle size is an important determinant of the dissolution rate and bioavailability of drugs in suspension. Drugs are given in different forms. They are indicated for chronic, dry lesions and contraindicated in exudative lesions. An elixir is a sweetened, usually hydroalcoholic solution of a bitter or nauseous drug intended for oral administration. The topical dosage forms available to treat animals include solids (dusting powders), semisolids (creams, ointments, pastes, and gels), and liquids (solutions, suspension concentrates, suspoemulsions, emulsifiable concentrates, paints, and tinctures). Currently, enflurane, halothane, isoflurane, methoxyflurane, and nitrous oxide are the most commonly used inhaled anesthetic agents. Preparation of Dilution. Rather, freeze-drying, or lyophilization, is used to produce a porous powder that reconstitutes readily. The dosage forms of the oral route include Tablets, Capsules, Powders, Mixtures, Emulsions and Gels. Drops 10.Emulsions 11.Other However, this may not be the case in species in which the emulsifying properties of skin secretions and the large numbers of follicles and glands per unit surface area must be considered (eg, cattle and sheep). Sucrose is the most frequently used sugar, and syrups usually contain 60%–80%. In addition, sustained-release boluses containing methoprene or diflubenzuron are approved for the control of manure-breeding flies in cattle. Mastitis infusion products are often terminally sterilized by irradiation. Dosage Form (DF) is defined as the physical form of a dose of a chemical compound used as a drug or medication intended for administration or consumption. Absorption after oral administration can be quite variable. Back rubbers are charged by soaking thoroughly in oil-containing pesticide, typically a synthetic pyrethroid, an organophosphate, or a combination of the two. A humectant (eg, glycerin or propylene glycol) is used to prevent the paste that collects at the nozzle of the dispenser from forming a hard crust. In the case of sheep, mechanical stripping results from the fleece acting as a sieve toward the active ingredient, with the degree of filtration being primarily determined by particle size. The mechanism of percutaneous drug absorption varies between species and is not completely understood. • Explain the correct techniques for administration of eye drops, metered-dose . Dosage Forms, Routes of Administration, and Dispensing Medications . One is constructed from a polymer that provides structural support and acts as a release rate-controlling matrix. The dosage form of a pharmaceutical product denotes its method of entry or delivery into a biological system. The oil retards evaporation of the insecticide and enhances adherence to the animal’s coat. Route of administration may be oral, intravenous, intramuscular, cutaneous, subcutaneous, etc. The dosage form (e.g. Transdermal patches, for instance, are used to deliver analgesics to the systemic circulation. A draining pen located at the exit of the vat allows dip wash that drains off treated animals to return to the vat. Liquid dosage form, 3. Testosterone pellets are available to implant in the ears of wethers at doses of 70–100 mg every 3 mo for the prevention of ulcerative posthitis. Semi-solid dosage form, 4. There are different types of dosage forms. Injectable preparations are usually sterile solutions or suspensions of drug in water or other suitable physiologically acceptable vehicles. Prominent among these systems are intraruminal boluses, which contain a range of active ingredients including parasiticides, nutritional supplements, antibloat agents, and production enhancers. Drugs are substances other than nutrients or essential dietary ingredients, which when administered to a living organism, influences biological functions. The semisolid properties are due to a polymer imparting a continuous structure to the hydrophilic liquid. The three main parenteral routes of drug administration are IV, IM, and SC, and in all cases administration is usually via a hollow needle. ... Administration convenient, particularly for infants, psychoticpatients. Advantages:- 1. Generally, dosage forms are simply classified as solids or liquids.Solid dosage forms include tablets and powders used in propelled inhalants, such as asthma inhalers. Classification of Dosage Forms - The Pharma Education, The Pharma Education | Best Pharmaceutical Education Network, Pharma Quiz 3 - Find answers of Pharma Quiz 2 - The Pharma Education, Pharma Quiz 2 - Find answers of Pharma Quiz 1 - The Pharma Education, Posology - Definition and Factors affecting Posology, List of Pharmaceutical Excipients/Additives and Their Uses Enlisted, List of Pharmaceutical Regulatory Agencies and Organizations around the World, Parenteral Dosage Forms - Sterile Pharmaceutical Dosage Forms, Pharmaceutical Emulsion - Types, Advantages, Disadvantages and Its Identification. Spot-on formulations are also available to control lice in cattle. Initial Dose. Dilute 1 mL (0.2 mg) in 9 mL of Sodium Chloride Injection, USP, or 5% Dextrose Injection, USP. Common dosage forms Enteral medications are given orally and pass through the GI tract to be absorbed into the bloodstream and metabolized by the liver. Recommended dosage for adults with heart block, Adams-Stokes attacks, and cardiac arrest: Route of. Types of liquid dosage forms 5. Additionally, the incorporation of a binder such as lignin sulfonate in blocks manufactured by compression, or magnesium oxide in blocks manufactured by chemical reaction, increases hardness. A gel is a nongreasy, semisolid, aqueous solution. The three main parenteral routes of drug administration are IV, IM, and SC, and in all cases administration is usually via a hollow needle. Hand-jetting involves the use of a handpiece (or wand) to “rake” a pesticide solution into the wool along the dorsal midline and sometimes into the breech, crutch, and poll. Solid dosage form, 2. Formulation of a dosage form typically involves combining an active ingredient and one or more excipients; the resultant dosage form determines the route of administration and the clinical efficacy and safety of the drug. Tarceva in combination with gemcitabine is indicated for the first-line treatment of patients with locally advanced, unresectable or metastatic pancreatic cancer [see Clinical Studies ]. Optimization of drug doses is also critical to achieving clinical efficacy and safety. For example, particle size is rarely altered during capsule manufacture, and capsules mask the taste and odor of the active ingredient and protect photolabile ingredients. Also see the Drug Volume Calculator on this page to calculate the volume of a drug in ml to administer. Start studying Chapter 5 Dosage Forms, Routes of Administration and Drug Classifications, Drug Abbreviations, and Medical Terminology. Drug release from dispersed matrix systems involves dissolution of the drug into the polymer, followed by diffusion of the drug through the polymer and partitioning from the surface of the polymer into the surrounding aqueous environment. Dosage form design may also be used modify the rate of absorption. A transdermal delivery gel consists of a vehicle, most commonly pluronic lecithin organogel (PLO gel), which delivers drug via the transdermal route to the bloodstream. Thickening agents are included to increase the viscosity of the formulation, thereby overcoming sedimentation of the suspended particles and affording good longterm stability. A suspension for injection consists of insoluble solid particles dispersed in a liquid medium, with the solid particles accounting for 0.5%–30% of the suspension. Caking of injectable suspensions is minimized through the production of flocculated systems, comprising clusters of particles (flocs) held together in a loose, open structure. The taste of most drugs is less noticeable in suspension than in solution, because the drug is less soluble in suspension. Volatile liquid insecticides such as dichlorvos or naled are used in vapor-release collars. Bolus intravenous injection. Parenteral dosage forms and delivery systems include injectables (ie, solutions, suspensions, emulsions, and dry powders for reconstitution), intramammary infusions, intravaginal delivery systems, and implants. A range of strategies has been reported to stabilize formulations containing recombinant proteins and peptides, including the choice of carrier vehicle (eg, oleaginous vehicles), the use of lyophilization excipients, the use of stabilizers such as sugars and detergents, chemical modification of the proteins and peptides, and the use of site-directed mutagenesis to synthesize more stable proteins. Ear drops are solutions of drugs such as antibiotics, insecticides, or anti-inflammatory agents. This can include injections, topical and inhalation routes. Gelatin capsules are frequently more expensive than tablets but have some advantages. Medicaments are generally well released from gels, which are easily washed off on account of their water miscibility. Because of this, spray races should be used as an adjunct to shower or plunge dipping of sheep. Friar's balsam is compound benzoin tincture and is used to protect and toughen ulcerated or fissured skin. Liquid Solid Semisolid Divisions of dosage forms 3. By comparison, water-in-oil emulsions are emollient and cleansing. The situation with sheep is different—the very short contact time in a spray race limits the uptake of insecticide, which means the fleece seldom becomes saturated. Glass boluses are designed to dissolve in ruminal fluids, thereby releasing the incorporated elements. It may be necessary to include a cosolvent to increase the solubility of the drug. Ionized solutes, for example, are reported to cross the skin of animals via shunt pathways (sweat ducts, follicles). Silicone, surrounded by an outer layer of estradiol-loaded silicone due to the medicated block a draining pen at... 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