Decongestant

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Overview

A decongestant is a broad class of medications used to relieve nasal congestion. Generally, they work by reducing swelling of the mucous membranes in the nasal passages.

Mechanism

Most decongestants cause response from adrenoreceptor a₁, chiefly responsible for vasoconstriction (a₂ modulates adrenaline/noradrenaline levels, b₁ is the most stimulating and increases cardiac output, b₂ dilates the bronchial walls, and b₃ induces lipolysis). The effects are not limited to the nose and these medicines can increase hypertension (blood pressure) through vasoconstriction, but most decongestants are not pronounced stimulants due to lack of response from the other adrenoreceptors.

These are normally paired with antihistamines to lessen this effect, but they don't always even each other out.

Administration

These agents are usually administered topically (by the intranasal route) or orally.

Examples

The most common oral decongestants are pseudoephedrine and phenylephrine; phenylpropanolamine (PPA) is another, although it's no longer available in the US. Oxymetazoline and phenylephrine are a commonly available topical decongestants (nasal sprays).

See also

• Nasal congestion (includes non-pharmacological remedies)
• Topical decongestant
• Adrenoreceptor
• Expectorant

v • d • e Major Drug Groups
Gastrointestinal tract (A)	Antacids • Antiemetics  • H₂-receptor antagonists • Proton pump inhibitors • Laxatives • Antidiarrhoeals
Blood and blood forming organs (B)	Anticoagulants • Antiplatelets • Thrombolytics
Cardiovascular system (C)	Antiarrhythmics • Antihypertensives • Diuretics • Vasodilators • Antianginals • Beta blockers • Angiotensin converting enzyme inhibitors • Antihyperlipidemics
Skin (D)	Emollients - Antipruritics
Reproductive system (G)	Hormonal contraception • Fertility agents • Selective estrogen receptor modulators • Sex hormones
Endocrine system (H)	Anti-diabetics • Corticosteroids • Sex hormones • Thyroid hormones
Infections and Infestations (J, P)	Antibiotics • Antivirals • Vaccines • Antifungals • Antiprotozoals • Anthelmintics
Malignant and Immune disease (L)	Anticancer agents • Immunostimulators • Immunosuppressants
Muscles, Bones, and Joints (M)	Anabolic steroids • Anti-inflammatories • Antirheumatics • Corticosteroids • Muscle relaxants
Brain and Nervous system (N)	Anesthetics • Analgesics • Anticonvulsants • Mood stabilizers  • Anxiolytics • Antipsychotics • Antidepressants • Nervous system stimulants • Sedatives
Respiratory system (R)	Bronchodilators • Decongestants  • Antihistamines

v • d • e Decongestants and other nasal preparations (R01)
Topical: sympathomimetics, plain	Cyclopentamine - Ephedrine - Phenylephrine - Oxymetazoline - Tetryzoline - Xylometazoline - Naphazoline - Tramazoline - Metizoline - Tuaminoheptane - Fenoxazoline - Tymazoline - Epinephrine
Topical: antiallergic agents, excluding corticosteroids	Cromoglicic acid - Levocabastine - Azelastine - Antazoline - Spaglumic acid - Thonzylamine - Nedocromil - Olopatadine
Topical: corticosteroids	Beclometasone - Prednisolone - Dexamethasone - Flunisolide - Budesonide - Betamethasone - Tixocortol - Fluticasone - Mometasone furoate - Triamcinolone - Ciclesonide
Topical: other nasal preparations	Calcium hexamine thiocyanate - Retinol - Ipratropium bromide - Ritiometan - Mupirocin - Hexamidine - Framycetin
Systemic use: Sympathomimetics	Phenylpropanolamine - Pseudoephedrine - Phenylephrine

nl:Decongestivum

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Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .