Pharmaceutics & Dosage Forms

Parenteral Administration

TRParenteral Uygulama
Also known as:Parenteral route · Injectable administration

Administration of a drug by a route that bypasses the gastrointestinal tract, usually by injection or infusion (intravenous, intramuscular, subcutaneous, intradermal, intrathecal and others).

In depth

Intravenous administration provides complete and immediate systemic availability and allows titration, whereas intramuscular and subcutaneous absorption depends on local blood flow, injection volume and formulation and can be deliberately prolonged with depot or oily vehicles. Parenteral routes are used when rapid onset is needed, when a drug is poorly absorbed or degraded orally (for example, insulin, heparins and most biologics) or when the patient cannot take oral medicines.

Parenteral products must be sterile and free of pyrogens (bacterial endotoxins); risks include infection, thrombophlebitis, extravasation, embolism, incompatibility in infusion lines and infusion-rate-related reactions.

Clinical pearl

Check compatibility before giving drugs through the same line: in neonates, ceftriaxone must not be given with calcium-containing intravenous solutions because of fatal precipitates; also follow recommended infusion rates.

Example drugs

insulin Heparin Ceftriaxone
TRIn Turkish

Parenteral Uygulama

İlacın gastrointestinal kanalı atlayan bir yolla, genellikle enjeksiyon veya infüzyonla (intravenöz, intramüsküler, subkutan, intradermal, intratekal vb.) uygulanmasıdır.

İntravenöz uygulama tam ve anında sistemik biyoyararlanım sağlar ve dozun titre edilmesine olanak verir; intramüsküler ve subkutan absorpsiyon ise lokal kan akımına, enjeksiyon hacmine ve formülasyona bağlıdır ve depo ya da yağlı taşıyıcılarla bilinçli olarak uzatılabilir. Parenteral yollar hızlı etki başlangıcı gerektiğinde, ilaç oral yoldan yetersiz absorbe edildiğinde veya yıkıma uğradığında (örneğin insülin, heparinler ve biyolojik ilaçların çoğu) ya da hasta oral ilaç alamadığında tercih edilir.

Parenteral ürünler steril ve pirojensiz (bakteriyel endotoksin içermeyen) olmalıdır; başlıca riskler enfeksiyon, tromboflebit, ekstravazasyon, emboli, infüzyon hatlarında geçimsizlik ve infüzyon hızına bağlı reaksiyonlardır.

Aynı hattan birden fazla ilaç verilmeden önce geçimlilik kontrol edilmelidir: yenidoğanlarda seftriakson, ölümcül çökeltiler nedeniyle kalsiyum içeren intravenöz çözeltilerle birlikte verilmemelidir; önerilen infüzyon hızlarına da uyulmalıdır.

Diğer adları:Parenteral yol · Enjeksiyon yoluyla uygulama
Updated 24.09.2026 0 views Educational reference — verify against current sources before clinical use.

Read next

Route of AdministrationUygulama Yolu

The path by which a drug is brought into contact with the body, such as oral, sublingual, rectal, intravenous, intramuscular, subcutaneous, inhaled, topical or transdermal.

 BioavailabilityBiyoyararlanım

The fraction of an administered dose that reaches the systemic circulation unchanged, and the rate at which it does so; by definition, bioavailability is 1 (100%) for an intravenous dose.

 Depot InjectionDepo Enjeksiyon

A parenteral preparation, usually given intramuscularly or subcutaneously, that forms a reservoir at the injection site from which the drug is released slowly over weeks to months.

 LiposomeLipozom

A spherical vesicle of one or more phospholipid bilayers enclosing an aqueous core, used as a drug carrier that holds hydrophilic drugs in the core and lipophilic drugs within the bilayer.

 AbsorptionAbsorpsiyon

The process by which a drug enters the bloodstream from the site of administration, such as the gastrointestinal tract, skin, or lungs.