Drug Administration Routes
Drug Administration Routes - Related Videos
01:18
Additional Routes of Drug Administration
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2023
Choosing the appropriate route of drug administration is significantly influenced by two key factors: the therapeutic objectives and the inherent properties of the drug being used. Administering drugs via inhalation allows for the direct delivery of gaseous, volatile substances or droplets to different parts of the respiratory tract. One of the advantages of the inhalation route is the rapid absorption of drugs into the circulatory system, which is possible because of the large surface area of...
01:18
Routes of Drug Administration: Enteral
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2025
Medications can be administered through the enteral route using liquids, capsules, or tablets. Enteral administration involves drug administration via the mouth in two ways: orally or sublingually. Unlike sublingually drugs, drugs that are taken orally pass through the gastrointestinal (GI) tract and get metabolized by the liver. Once metabolized, the drug is absorbed into the systemic circulation, reaching different body parts via the bloodstream. However, while passing through the stomach,...
01:22
Routes of Drug Administration: Overview
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2023
Drug administration involves delivering drugs to the body through various routes, such as enteral, parenteral, and topical. Enteral administration refers to drugs absorbed through the gastrointestinal tract. They can be swallowed (perorally), placed under the tongue (sublingually), or on the inner lining of the cheeks (buccally). Perorally administered drugs take time to be absorbed and have a slower onset of action. The rectal route is another form of enteral administration, which allows for...
01:25
Routes of Drug Administration: Parenteral
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2023
The administration of drugs via parenteral routes allows for direct drug introduction into the systemic circulation, resulting in high bioavailability because the medication bypasses the harsh conditions of the gastrointestinal tract and hepatic metabolism. The intravenous route (IV) of drug administration can be further categorized into two types. The bolus injection administers the entire dose rapidly, while an intravenous infusion slowly delivers smaller doses steadily. The IV route is often...
14:10
Manual Restraint and Common Compound Administration Routes in Mice and Rats
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Cited by 95 •
2012
Working safely and humanely with research rodents requires a core competency in handling and restraint methods. This article will present the basic principles required to safely handle and effectively administer compounds to mice and rats.
FAQs
The selected route affects how quickly a medication is absorbed, how much reaches systemic circulation, how long its effects may persist, and how precisely the dose can be controlled. These differences arise from the barriers encountered before circulation is reached. Consequently, route selection can alter both therapeutic effectiveness and the risk of adverse effects.
First-pass metabolism can affect a drug before it reaches systemic circulation. Routes that use the gastrointestinal tract may expose a medication to this process, whereas parenteral routes bypass some or all gastrointestinal barriers. Comparing these pathways helps pharmacologists anticipate differences in bioavailability and determine how route choice may influence treatment outcomes.
Enteral routes, including oral and sublingual delivery, involve gastrointestinal or oral-mucosal pathways. Parenteral routes, such as intravenous, intramuscular, and subcutaneous injection, bypass some or all gastrointestinal barriers. This distinction changes the path to systemic circulation and can influence absorption, bioavailability, onset, duration, dosing control, and safety.
Route selection requires balancing therapeutic effectiveness with convenience, patient needs, and safety. Clinicians can compare how each option affects absorption, bioavailability, onset, duration, and dosing precision, while also considering whether gastrointestinal barriers or first-pass metabolism influence delivery. This comparison supports a treatment design suited to the intended pharmacological outcome.
Comparing Drug Administration Routes is useful when a treatment requires a particular balance of rapid or sustained effects, controlled dosing, and patient acceptability. Pharmacology uses these comparisons to evaluate how medications reach systemic circulation and whether a route introduces gastrointestinal barriers or first-pass metabolism that could affect therapeutic effectiveness or safety.
Route comparisons show how delivery choices may influence bioavailability, onset, duration, and the precision of dosing. They also clarify whether a medication encounters gastrointestinal barriers or first-pass metabolism. By relating these features to patient needs and potential adverse effects, researchers and clinicians can make more rational decisions about treatment design and administration.