![]() The Food and Drug Administration (FDA) has placed restrictions on pseudoephedrine, the active ingredient in many decongestants, because people can convert it to methamphetamine. People experiencing these side effects should seek medical advice for their symptoms.ĭecongestants decrease swelling in the nose, which may ease symptoms associated with postnasal drip, such as a runny nose. Possible side effects of antihistamines include: Possible side effectsĪlthough second-generation antihistamines are safer than older medications, side effects may still occur. People should inform their doctor if they are taking other medications to check whether these will interact with antihistamines. Research from 2019 found that second-generation antihistamines are safer and work more effectively than first-generation antihistamines. However, second-generation antihistamines are nonsedating. ![]() Older or first-generation versions of antihistamines often cause side effects, such as sedation. The usual adult dose is 10 mg once a day.Ī person should check the packaging for each medication and confirm with a doctor whether they are suitable for children. ![]() The typical adult dose of Benadryl is 25–50 milligrams (mg) three or four times daily as needed.Ĭlaritin comes as a 10 mg tablet and a liquid (1 mg per milliliter). The exact dose depends on the form of the medication. Second and third-generation antihistamines include: chlorpheniramine (Chlor-Trimeton), also available OTC.diphenhydramine (Benadryl), also available over the counter (OTC).Prescription first-generation oral antihistamines include: We discuss the best medications for postnasal drip in more detail below.Īntihistamines act on the histamine receptors, which often cause typical allergy symptoms, such as excess mucus production and postnasal drip. This reduces the risk of systemic or body-wide side effects compared with oral medications. These medications also come in different forms, including:Īccording to research from 2019, topical medications, such as a nasal spray, allow people to apply a higher concentration of medication directly to the receptor site. treating the underlying cause of postnasal drip.bacterial infections, such as sinusitisĭifferent classifications of medications perform different functions that may help with postnatal drip, such as:.Doctors call this postnasal drip.Īccording to the American Academy of Otolaryngology, postnasal drip can develop due to: However, if someone produces excess mucus, they may feel it dripping down the back of the throat. A randomised controlled study is now needed to confirm or refute these findings.Usually, a person either swallows the mucus their body produces or blows it out of their nose. In a pilot open 'real-life' study treatment targeted towards rhinosinusitis accompanying PND syndrome and chronic cough led to an improvement in cough. There was improvement in anterior nasal discharge symptom scores (p=0.005) and in endoscopic nasal scores post-treatment (p<0.01), with a tendency to improved PND scores. Mean cough score improved post-treatment (p<0.05), but there was no significant change in capsaicin cough sensitivity or nasal catarrh questionnaire score. All patients reported having the presence of mucus in the throat. In an open study, they were treated with fluticasone nasules, ipratropium bromide and azelastine nasal sprays for 28 days, after which they were re-assessed.Įighteen out of 21 patients completed the study. Rhinosinusitis was assessed by questionnaires, direct examination of the nose and by high-resolution computed tomography. Patients presenting with a chronic cough and who complained of PND were enrolled and symptoms of PND and cough were assessed by questionnaire and by a capsaicin cough response. We examined the effect of specific topical treatment of rhinosinusitis on cough in patients presenting with a chronic cough associated with a postnasal drip or 'nasal catarrh'. The postnasal drip (PND) syndrome is often linked as a cause of chronic cough although this is disputed.
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