Topical Decongestants
Topical Decongestants - Related Videos
01:27
Upper Respiratory Drugs: Decongestants
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2024
Decongestants are a class of medications used primarily to alleviate nasal congestion, a common symptom resulting from allergies, colds, sinusitis, and other upper respiratory tract infections. These drugs work by activating α-adrenergic receptors, constricting small blood vessels in the nasal membranes. This action results in the opening of clogged nasal passages, thereby facilitating sinus drainage and relieving congestion. Most decongestants are readily available over-the-counter in various...
04:43
Topical Testing Assay: A Technique to Evaluate the Insecticidal Potential of Dopamine Receptor Antagonists on Adult Female Mosquitoes by Topical Application
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2025
In this video, we demonstrate the topical testing assay to determine the toxicity of a potential insecticide on adult female mosquitoes. Using a dopamine receptor antagonist that causes lethal inhibition of neurotransmission in mosquitoes, this method describes a way to evaluate the toxic effects of insecticides upon topical application.
11:44
Preparing and Administering Topical Medications
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2017
Source: Madeline Lassche, MSNEd, RN and Katie Baraki, MSN, RN, College of Nursing, University of Utah, UT Topical medications are applied directly to the body surfaces, including the skin and mucous membranes of the eyes, ears, nose, vagina, and rectum. There are many classes of topical medications, such as creams, ointments, lotions, patches, and aerosol sprays. Medications that are applied to the skin to produce a slow, controlled, systemic effect are also referred to as transdermal.
08:44
Generation of Topically Transgenic Rats by In utero Electroporation and In vivo Bioluminescence Screening
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Cited by 7 •
2013
Genes can be manipulated during development of the cortex or the hippocampus of the rat via in utero electroporation (IUE) at E16, to enable fast and targeted modifications in neuronal connectivity for later studies of behavior or neuropathology in adult animals. Postnatal in vivo imaging for control of IUE success is performed by bioluminescence of activating co-transfected luciferase.
05:43
Topical Airway Anesthesia for Awake-endoscopic Intubation Using the Spray-as-you-go Technique with High Oxygen Flow
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Cited by 11 •
2017
The topical anesthetic lidocaine was atomized using a high oxygen flow through the working channel of a flexible intubating endoscope to achieve topical airway anesthesia for awake endotracheal intubation. We prefer this modified spray-as-you-go technique for endoscopic intubation to classical bolus application because of higher patient satisfaction and better compliance.
FAQs
Their pharmacologic effect begins when local alpha-adrenergic agonists stimulate receptors on blood vessels within the nasal mucosa. This receptor activity causes vasoconstriction, meaning the vessels narrow and receive less blood flow. Reduced vascular flow limits mucosal edema, which decreases the swollen tissue contributing to nasal airway obstruction and explains the rapid symptomatic effect.
Frequent or prolonged use can produce rebound congestion, also called rhinitis medicamentosa. The initial vasoconstrictor effect may no longer provide sustained relief, while congestion returns after continued exposure. This makes dose and duration important pharmacologic variables: extending treatment without appropriate limits can shift a short-term benefit toward persistent nasal obstruction.
Dose and absorption influence both the intended local response and the possibility of adverse effects. Although these medicines are applied to the nasal passages, the amount absorbed remains clinically relevant when assessing safety. Pharmacologic evaluation therefore considers how much is used, how often it is applied, how long treatment continues, and whether unwanted effects appear.
Topical decongestants may provide short-term relief when swollen nasal tissue accompanies the common cold, allergic rhinitis, or sinus congestion. Their usefulness comes from reducing mucosal edema and improving airway patency rather than treating every underlying cause of congestion. This distinction helps place the medicines within symptom management and supports cautious use when congestion persists.
Before use, clinicians or patients should consider the intended dose, treatment duration, absorption, and potential adverse effects. The application targets the nasal passages, but safe pharmacologic use depends on limiting exposure to the conditions appropriate for short-term relief. Attention to these factors also helps reduce the likelihood of rebound congestion associated with frequent or prolonged use.
They illustrate how receptor-selective local drug action can alter tissue blood flow and produce a clinically noticeable change in airway obstruction. Pharmacology also examines the balance between rapid symptomatic benefit and problems linked to exposure, including rebound congestion and adverse effects. Their use therefore connects mechanism, administration, absorption, dose, duration, and therapeutic safety.