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Injection site reactions (ISRs) are reactions that occur at the site of injection of a drug. They may be mild or severe and may or may not require medical intervention. Some reactions may appear immediately after injection, and some may be delayed. [1] Such reactions can occur with subcutaneous, intramuscular, or intravenous administration.
Type A: augmented pharmacological effects, which are dose-dependent and predictable [5]; Type A reactions, which constitute approximately 80% of adverse drug reactions, are usually a consequence of the drug's primary pharmacological effect (e.g., bleeding when using the anticoagulant warfarin) or a low therapeutic index of the drug (e.g., nausea from digoxin), and they are therefore predictable.
Drug injection is also commonly a component in HIV-related syndemics. Fragments from injection of pills are known to clog the small blood vessels of the lungs, brain, and elsewhere, potentially causing pulmonary embolism (PE), stroke, or venous embolism. A small proportion of PE is due to the embolization of air, fat, and talc in the drugs of ...
A few drugs such as alcohol are absorbed by the lining of the stomach, and therefore tend to take effect much more quickly than the vast majority of oral medications which are absorbed in the small intestine. Gastric emptying time can vary from 0 to 3 hours, [2] and therefore plays a major role in onset of action for orally administered drugs ...
It is given by slow injection into a vein or by mouth. [4] Side effects may include heart problems if given too quickly by injection into a vein. [4] By mouth it can result in abdominal pain, peptic ulcer disease, or gastrointestinal bleeding. [4] Greater care is recommended in those with kidney problems. [2]
Consumption of drugs can be via inhalation, injection, smoking, ingestion, absorption via a patch on the skin, suppository, or dissolution under the tongue. In pharmacology , a drug is a chemical substance, typically of known structure, which, when administered to a living organism, produces a biological effect. [ 2 ]
Administration can take place via enteral administration (absorption of the drug through the gastrointestinal tract) [2] or parenteral administration (generally injection, infusion, or implantation). [3] [4] Contrast with topical administration where the effect is generally local. [4]
After injection, a medication may be designed to be released slowly, called a depot injection, which can produce long-lasting effects. An injection necessarily causes a small puncture wound to the body, and thus may cause localized pain or infection. The occurrence of these side effects varies based on injection location, the substance injected ...