It's often used when nasal sprays can't be tolerated or for mild asthma. It's especially effective in treating allergy-induced asthma. Leukotrienes are immune system chemicals that cause allergy symptoms, such as irritation in the nose and making too much mucus. Montelukast (Singulair) is a prescription tablet taken to block the action of leukotrienes. Cromolyn sodium doesn't have serious side effects. It's also available in eye drop form with a prescription. Cromolyn sodium is available as a nonprescription nasal spray that must be used several times a day. This medication is most effective if you start using it before you have symptoms. Cromolyn sodiumĬromolyn sodium can help relieve hay fever symptoms by preventing the release of histamine. Check with your health care provider before taking decongestants if you have high blood pressure or heart disease or if you're pregnant.ĭon't use a decongestant nasal spray for more than 2 to 3 days at a time because it can worsen symptoms when used continuously (rebound swelling). Decongestants may cause problems urinating if you have an enlarged prostate. Oral decongestants can cause a number of side effects, including increased blood pressure, insomnia, irritability and headache. Nasal decongestant sprays include phenylephrine hydrochloride (Neo-Synephrine) and oxymetazoline (Afrin).Oral decongestants include pseudoephedrine (Sudafed).They are also available with and without a prescription. Because they do not relieve other symptoms of hay fever, they're sometimes combined with other medications such as antihistamines.ĭecongestants are available as liquids, tablets and nasal sprays. Decongestantsĭecongestants reduce nasal stuffiness and pressure from swelling. Talk to your health care provider before taking antihistamines, especially if you're pregnant or breastfeeding, or have glaucoma or an enlarged prostate. Other side effects of oral antihistamines can include restlessness, headaches, changes in appetite, trouble sleeping, and problems with blood pressure and urinating. Some oral antihistamines may make you sleepy. Prescription nasal sprays include olopatadine (Patanase).Ĭommon side effects of antihistamines are dry mouth, nose and eyes.Nonprescription nasal sprays include azelastine (Astepro Allergy).Nonprescription eye drops include olopatadine (Pataday) and ketotifen fumarate (Alaway, Zaditor).Oral antihistamines available without a prescription include loratadine (Claritin, Alavert), cetirizine (Zyrtec Allergy) and fexofenadine (Allegra Allergy).Antihistamine eye drops can help relieve eye itchiness and irritation. However, there are also antihistamine nasal sprays that can relieve nasal symptoms. These preparations are usually given as pills (orally). Antihistamines can help with itching, sneezing and a runny nose but have less of an effect on congestion. AntihistaminesĪntihistamines work by blocking a symptom-causing chemical (histamine) released by your immune system during an allergic reaction. Steroid side effects from a nasal spray are rare. Side effects can include an unpleasant smell or taste and nose irritation. Nasal corticosteroids are a safe, long-term treatment for most people.
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