{"id":630998,"date":"2025-01-10T15:54:47","date_gmt":"2025-01-10T20:54:47","guid":{"rendered":"https:\/\/www.singlecare.com\/blog\/?p=630998"},"modified":"2025-01-10T15:54:47","modified_gmt":"2025-01-10T20:54:47","slug":"zyrtec-d-side-effects","status":"publish","type":"post","link":"https:\/\/www.singlecare.com\/blog\/zyrtec-d-side-effects\/","title":{"rendered":"Zyrtec-D side effects and how to avoid them"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Seasonal allergies can be bothersome, leading to symptoms such as an itchy nose, sneezing, runny nose, and itchy eyes. For many people, a dose of <\/span><a href=\"https:\/\/www.singlecare.com\/prescription\/zyrtec\"><span style=\"font-weight: 400;\">Zyrtec<\/span><\/a><span style=\"font-weight: 400;\"> (cetirizine HCL) can work wonders for relieving annoying <\/span><a href=\"https:\/\/www.singlecare.com\/blog\/seasonal-allergies-wrong-medication\/\"><span style=\"font-weight: 400;\">allergy symptoms<\/span><\/a><span style=\"font-weight: 400;\">. It\u2019s a brand-name over-the-counter (OTC) drug that contains cetirizine and works by blocking the effects of histamine, a substance that can trigger allergic reactions and inflammation.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">While Zyrtec can be effective for various allergy symptoms, people experiencing a stuffy nose might benefit more from <\/span><a href=\"https:\/\/www.singlecare.com\/prescription\/zyrtec-d-allergy-congestion\"><span style=\"font-weight: 400;\">Zyrtec-D<\/span><\/a><span style=\"font-weight: 400;\"> (cetirizine pseudoephedrine Er). This brand-name <\/span><a href=\"https:\/\/www.singlecare.com\/blog\/zyrtec-vs-zyrtec-d\/\"><span style=\"font-weight: 400;\">version of Zyrtec<\/span><\/a><span style=\"font-weight: 400;\"> combines an antihistamine with the decongestant pseudoephedrine, which helps shrink blood vessels in the nose and sinuses to reduce congestion. Still, Zyrtec-D may cause side effects, some of which can be more severe than those with regular Zyrtec. Read on to learn more about the potential side effects of Zyrtec-D.\u00a0<\/span><\/p>\n<h2 id=\"common-side-effects-of-zyrtec-d\"><span style=\"font-weight: 400;\">Common side effects of Zyrtec-D<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Drowsiness is one of the most common side effects of cetirizine. While it typically causes less drowsiness than <\/span><a href=\"https:\/\/www.aaaai.org\/allergist-resources\/ask-the-expert\/answers\/2021\/antihistamine\"><span style=\"font-weight: 400;\">first-generation antihistamines<\/span><\/a><span style=\"font-weight: 400;\"> like Benadryl (diphenhydramine), some people may still experience this effect. On the other hand, pseudoephedrine, the second active ingredient in Zyrtec-D, is more commonly linked to trouble sleeping or insomnia.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The most common side effects associated with Zyrtec-D include:\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Drowsiness<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Insomnia<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dry mouth\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Nausea\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Headache\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Sore throat<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Fatigue\u00a0<\/span><\/li>\n<\/ul>\n<h2 id=\"serious-side-effects-of-zyrtec-d\"><span style=\"font-weight: 400;\">Serious side effects of Zyrtec-D<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Most side effects of Zyrtec-D are mild and temporary. However, this medication also comes with a risk of serious side effects. If any side effects persist or worsen, it&#8217;s recommended to consult a healthcare professional.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Potentially serious side effects of Zyrtec-D may include:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Irregular heartbeat<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><a href=\"https:\/\/jamanetwork.com\/journals\/jamainternalmedicine\/fullarticle\/765664\"><span style=\"font-weight: 400;\">High blood pressure (hypertension)<\/span><\/a><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Chest pain<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Seizures<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Hallucinations<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tremors<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Zyrtec-D may also cause severe allergic reactions, with symptoms like skin rash, trouble breathing, or swelling of the face or throat. If you experience serious side effects, seek medical attention immediately.<\/span><\/p>\n<h2 id=\"zyrtec-vs-zyrtec-d-side-effects\"><span style=\"font-weight: 400;\">Zyrtec vs. Zyrtec-D side effects<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Zyrtec-D has more side effects than <\/span><a href=\"https:\/\/www.singlecare.com\/blog\/zyrtec-side-effects\/\"><span style=\"font-weight: 400;\">Zyrtec<\/span><\/a><span style=\"font-weight: 400;\"> because it has two active ingredients instead of one. While they both share the side effects of the active ingredient cetirizine, Zyrtec-D also has pseudoephedrine side effects to contend with. <\/span><span style=\"font-weight: 400;\">Understanding the side effects of Zyrtec-D can be challenging because pseudoephedrine and cetirizine have contrasting effects. Cetirizine can cause central nervous system (CNS) depressant effects such as drowsiness and dizziness, while pseudoephedrine can cause stimulant effects like increased heart rate and insomnia.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">When you take Zyrtec-D, you might experience mixed effects\u2014some people may feel tired, while others may feel restless. This mix can make it hard to know how the medication will affect you, so it&#8217;s important to pay attention to how your body responds. Side effects can also depend on how much of the medication you take, with larger doses often causing more and stronger side effects.<\/span><\/p>\n<h2 id=\"how-soon-do-zyrtec-d-side-effects-start\"><span style=\"font-weight: 400;\">How soon do Zyrtec-D side effects start?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">The side effects of Zyrtec-D can appear as soon as the medication starts working. For most people, Zyrtec starts working <\/span><a href=\"https:\/\/www.singlecare.com\/blog\/how-long-does-it-take-zyrtec-to-work\/\"><span style=\"font-weight: 400;\">within an hour<\/span><\/a><span style=\"font-weight: 400;\"> after taking it. Common side effects like drowsiness, dizziness, or dry mouth can appear during this time.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Other side effects, like nausea or trouble sleeping, may take a bit longer to show up. Since each person&#8217;s body is different, the onset time can differ. In some cases, side effects might not show up until a person has taken the medication for a couple of days.<\/span><\/p>\n<h2 id=\"how-long-do-zyrtec-d-side-effects-last\"><span style=\"font-weight: 400;\">How long do Zyrtec-D side effects last?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">The side effects of Zyrtec-D can vary in how long they last. Most side effects are temporary and generally go away as the body adjusts to the medication. Side effects can develop as long as the medication is used but may become more bearable over time. If side effects last several days or worsen, consult a healthcare provider for medical advice.<\/span><\/p>\n<h2 id=\"what-are-the-long-term-side-effects-of-zyrtec-d\"><span style=\"font-weight: 400;\">What are the long-term side effects of Zyrtec-D?<\/span><\/h2>\n<p><a href=\"https:\/\/www.singlecare.com\/blog\/best-antihistamine\/\"><span style=\"font-weight: 400;\">Using antihistamines<\/span><\/a><span style=\"font-weight: 400;\"> like cetirizine for a long time might increase the risk of developing dementia, especially if taken in large amounts. Research shows that both first-generation and second-generation antihistamines can carry this risk, with higher chances of dementia as the dosage increases. One study found that the risk becomes even greater for those who take <\/span><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S2213219824005415\"><span style=\"font-weight: 400;\">more than 120 doses<\/span><\/a><span style=\"font-weight: 400;\"> over time.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Similarly, long-term use of stimulants like pseudoephedrine can also come with serious health risks. These medications may increase the chances of having a <\/span><a href=\"https:\/\/www.health.harvard.edu\/heart-health\/dont-let-decongestants-squeeze-your-heart\"><span style=\"font-weight: 400;\">stroke or a heart attack<\/span><\/a><span style=\"font-weight: 400;\">. This happens because stimulants can affect the heart and blood vessels, making them work harder than normal. Over time, this extra strain on the cardiovascular system can lead to dangerous health problems, especially in those with heart disease or other heart problems.<\/span><\/p>\n<h2 id=\"zyrtec-d-interactions\"><span style=\"font-weight: 400;\">Zyrtec-D interactions<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Zyrtec-D can interact with several other medications, which may lead to increased side effects or reduce the effectiveness of either drug. It may be helpful to be aware of these potential drug interactions and consult a healthcare professional before combining Zyrtec-D with other medications.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Potential medications that Zyrtec-D can interact with include the following.<\/span><\/p>\n<h3 id=\"other-cns-depressants\"><span style=\"font-weight: 400;\">Other CNS depressants<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Combining Zyrtec-D with other <\/span><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK549776\/\"><span style=\"font-weight: 400;\">CNS depressants<\/span><\/a><span style=\"font-weight: 400;\"> can increase sedation. This can result in increased drowsiness, dizziness, and impaired coordination. Examples of CNS depressants include benzodiazepines, barbiturates, opioids, muscle relaxants, and sleep medications.\u00a0<\/span><\/p>\n<h3 id=\"monoamine-oxidase-inhibitors-maois\"><span style=\"font-weight: 400;\">Monoamine oxidase inhibitors (MAOIs)<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Using pseudoephedrine alongside <\/span><a href=\"https:\/\/www.singlecare.com\/drug-classes\/maois\"><span style=\"font-weight: 400;\">MAOIs<\/span><\/a><span style=\"font-weight: 400;\"> can increase the risk of <\/span><a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC9680847\/\"><span style=\"font-weight: 400;\">severely high blood pressure<\/span><\/a><span style=\"font-weight: 400;\">. Examples of MAOIs include Nardil (phenelzine), Parnate (tranylcypromine), and Emsam (selegiline).\u00a0<\/span><\/p>\n<h3 id=\"tricyclic-antidepressants-tcas\"><span style=\"font-weight: 400;\">Tricyclic antidepressants (TCAs)<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The combination of Zyrtec-D with <\/span><a href=\"https:\/\/www.singlecare.com\/drug-classes\/tricyclic-antidepressants\"><span style=\"font-weight: 400;\">tricyclic antidepressants<\/span><\/a><span style=\"font-weight: 400;\"> can increase the risk of side effects such as abnormal heartbeat and high blood pressure. Examples of TCAs include Elavil (amitriptyline), Pamelor (nortriptyline), and Silenor (doxepin)<\/span><\/p>\n<h3 id=\"blood-pressure-medications\"><span style=\"font-weight: 400;\">Blood pressure medications<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Pseudoephedrine can raise blood pressure and counteract the effects of <\/span><a href=\"https:\/\/www.singlecare.com\/blog\/blood-pressure-medications\/\"><span style=\"font-weight: 400;\">antihypertensive medications<\/span><\/a><span style=\"font-weight: 400;\">. Caution is recommended when combining these drugs. Examples of blood pressure medications include Zestril (lisinopril), Norvasc (amlodipine), and Cozaar (losartan).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">It\u2019s always important to inform a healthcare provider about all medications being taken to avoid potential interactions. Make sure to mention other prescription drugs, OTC medicines, and herbal supplements.\u00a0<\/span><\/p>\n<h3 id=\"zyrtec-d-and-alcohol\"><span style=\"font-weight: 400;\">Zyrtec-D and alcohol<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Mixing Zyrtec-D with alcohol might increase drowsiness and slow thinking or reactions. Both cetirizine hydrochloride and alcohol have sedative properties, which can lead to amplified sedative effects when taken together. Given these interactions, activities like driving or using machinery can become dangerous. It\u2019s usually recommended to avoid drinking alcohol or at least limit it while taking Zyrtec-D.<\/span><\/p>\n<h2 id=\"safety-measures-while-using-zyrtec-d\"><span style=\"font-weight: 400;\">Safety measures while using Zyrtec-D<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Zyrtec-D has important warnings and precautions to think about before taking it. The two main ingredients, cetirizine and pseudoephedrine, have their own risks, so it\u2019s important to understand those before taking the medication.<\/span><\/p>\n<h3 id=\"those-with-an-allergy-to-zyrtec-d\"><span style=\"font-weight: 400;\">Those with an allergy to Zyrtec-D<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Zyrtec-D should be avoided in people who have a hypersensitivity or allergy to cetirizine, pseudoephedrine, or any ingredients in the medication. Taking this medication could cause severe allergic reactions in these individuals. It\u2019s also important to avoid Zyrtec-D if you have an allergy to hydroxyzine, as cetirizine is derived from hydroxyzine.<\/span><\/p>\n<h3 id=\"people-with-liver-problems\"><span style=\"font-weight: 400;\">People with liver problems<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">For people with liver problems, the dosage of cetirizine should be reduced. This is because the liver helps <\/span><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK548420\/\"><span style=\"font-weight: 400;\">break down the medication<\/span><\/a><span style=\"font-weight: 400;\">, and the body can\u2019t process the drug effectively when it&#8217;s not working well. A lower dose helps prevent buildup in the body, which can lead to stronger side effects.<\/span><\/p>\n<h3 id=\"people-with-kidney-problems\"><span style=\"font-weight: 400;\">People with kidney problems<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The dosage of Zyrtec-D should also be reduced for people with kidney issues (specifically those whose kidneys filter waste at a slower rate). The kidneys are responsible for removing waste and excess medication from the body. Medications can accumulate and cause unwanted side effects if the kidneys aren&#8217;t working well.<\/span><\/p>\n<h3 id=\"older-adults\"><span style=\"font-weight: 400;\">Older adults<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Studies on cetirizine have not included many patients ages 65 and older. While safety tests show no major differences in side effects compared to younger adults, older individuals may be <\/span><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0190962221001729\"><span style=\"font-weight: 400;\">more sensitive<\/span><\/a><span style=\"font-weight: 400;\"> to the effects of antihistamines. Therefore, older adults may need to consider taking lower doses.<\/span><\/p>\n<h3 id=\"other-medical-conditions\"><span style=\"font-weight: 400;\">Other medical conditions<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Tell a healthcare provider about any medical conditions before taking Zyrtec-D. You may want to mention whether you have a history of kidney disease, liver disease, glaucoma, enlarged prostate, thyroid problems, and cardiovascular problems.\u00a0<\/span><\/p>\n<h3 id=\"precautions-during-pregnancy-or-breastfeeding\"><span style=\"font-weight: 400;\">Precautions during pregnancy or breastfeeding<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Cetirizine is considered to be <\/span><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/29565188\/\"><span style=\"font-weight: 400;\">safe during pregnancy<\/span><\/a><span style=\"font-weight: 400;\">, according to animal studies. On the other hand, pseudoephedrine is not typically recommended during pregnancy, especially within the <\/span><a href=\"https:\/\/mothertobaby.org\/fact-sheets\/pseudoephedrine\/pdf\/\"><span style=\"font-weight: 400;\">first three months<\/span><\/a><span style=\"font-weight: 400;\"> of pregnancy.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">When it comes to breastfeeding, taking small doses of cetirizine is unlikely to cause harm if the benefits outweigh the risks. However, if a mother uses larger doses for a long time, it might reduce her <\/span><a href=\"https:\/\/mothertobaby.org\/fact-sheets\/cetirizine\/\"><span style=\"font-weight: 400;\">breast milk supply<\/span><\/a><span style=\"font-weight: 400;\"> or cause drowsiness and other side effects in the baby. It&#8217;s important for breastfeeding mothers to talk to a healthcare provider before using antihistamines to make sure they are safe for both them and their babies.<\/span><\/p>\n<h2 id=\"how-to-avoid-zyrtec-d-side-effects\"><span style=\"font-weight: 400;\">How to avoid Zyrtec-D side effects<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">By following certain guidelines, you can have a better chance of reducing the side effects of Zyrtec-D. Some side effects may be unavoidable, but you can take steps to make them less severe.<\/span><\/p>\n<h3 id=\"take-the-correct-dose\"><span style=\"font-weight: 400;\">Take the correct dose<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Always stick to the recommended amount of Zyrtec-D as shown on the package or given by a healthcare professional. Taking more than what\u2019s recommended can lead to side effects like feeling sleepy or having an increased heart rate. If you\u2019re unsure how much to take, ask your healthcare provider or pharmacist for help.<\/span><\/p>\n<h3 id=\"take-the-tablet-whole\"><span style=\"font-weight: 400;\">Take the tablet whole\u00a0<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Zyrtec-D is an <\/span><a href=\"https:\/\/www.accessdata.fda.gov\/drugsatfda_docs\/label\/2004\/19835slr016,21150slr005,30346slr011_zyrtec_lbl.pdf\"><span style=\"font-weight: 400;\">extended-release tablet<\/span><\/a><span style=\"font-weight: 400;\"> that slowly releases its ingredients into your body over time. It&#8217;s important to swallow the tablet whole without breaking, splitting, or chewing it. Breaking the tablet can cause the medication to be rapidly absorbed, which may cause more side effects.<\/span><\/p>\n<h3 id=\"watch-your-timing-of-medication\"><span style=\"font-weight: 400;\">Watch your timing of medication<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">What time of day you take Zyrtec-D may be important. It\u2019s a good idea to take it at the same time every day to keep steady levels in your body. Some people find it helpful to take it in the morning if they experience insomnia or in the evening if they experience tiredness.<\/span><\/p>\n<h3 id=\"avoid-medications-that-interact\"><span style=\"font-weight: 400;\">Avoid medications that interact<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Be careful with other medications you are taking along with Zyrtec-D, as some can cause problems. Always tell your healthcare provider about any other drugs or supplements you are using to avoid interactions that might make side effects worse.<\/span><\/p>\n<h3 id=\"take-it-with-food\"><span style=\"font-weight: 400;\">Take it with food<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Taking Zyrtec-D with food may help reduce gastrointestinal side effects like nausea or upset stomach. A light meal may help alleviate stomach pain and doesn\u2019t negatively affect how the medication is absorbed.<\/span><\/p>\n<h3 id=\"avoid-alcohol\"><span style=\"font-weight: 400;\">Avoid alcohol<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">It\u2019s best to stay away from alcohol while taking Zyrtec-D. Alcohol can worsen the drowsiness and dizziness from Zyrtec-D, making it harder to think clearly and maintain balance.<\/span><\/p>\n<h3 id=\"skipping-missed-doses\"><span style=\"font-weight: 400;\">Skipping missed doses\u00a0<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">If you miss a dose of Zyrtec-D, take it as soon as you remember. However, if it&#8217;s almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not take two doses at once to make up for a missed dose, as this can increase the risk of side effects.<\/span><\/p>\n<h3 id=\"limit-long-term-use-of-high-doses\"><span style=\"font-weight: 400;\">Limit long-term use of high doses<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Try not to use high doses of Zyrtec-D for a long time if you can avoid it. Using it for extended periods may lead to more side effects and increased tolerance. <\/span><a href=\"https:\/\/allergyri.com\/prosandconsofantihistamines\/\"><span style=\"font-weight: 400;\">Withdrawal after long-term use<\/span><\/a><span style=\"font-weight: 400;\"> may cause increased hives, headaches, and other symptoms.<\/span><\/p>\n<h2 id=\"how-to-treat-side-effects-of-zyrtec-d\"><span style=\"font-weight: 400;\">How to treat side effects of Zyrtec-D<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Side effects of Zyrtec-D are generally mild and don\u2019t require professional medical attention. You can often manage mild side effects with simple home remedies.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For example, drinking plenty of water may help manage a dry mouth. If you experience dizziness, try sitting or lying down until it passes. Rising slowly from a sitting or lying position may also help prevent dizziness.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Some side effects may require more attention. You should seek medical attention for the following side effects:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Severe drowsiness<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Severe rash, itching, or swelling<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Difficulty breathing or swelling<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Fast, irregular heartbeat<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Seizures<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">You should also seek medical help if side effects persist or worsen, especially if they affect your ability to work or <\/span><a href=\"https:\/\/www.singlecare.com\/blog\/news\/allergy-survey\/\"><span style=\"font-weight: 400;\">carry out other daily activities<\/span><\/a><span style=\"font-weight: 400;\">. A healthcare provider can provide supportive care and medical advice to manage serious side effects.<\/span><\/p>\n<h2 id=\"bottom-line-is-zyrtec-d-safe\"><span style=\"font-weight: 400;\">Bottom line: Is Zyrtec-D safe?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Zyrtec-D can be a good choice for managing seasonal allergy symptoms, especially for people who experience nasal congestion. However, it can cause side effects, which can range from mild problems like drowsiness and dry mouth to more serious risks like irregular heartbeat or high blood pressure.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">You can reduce potential side effects by taking the recommended dosage, avoiding alcohol, and being aware of any other medications you may be taking. If you have severe or ongoing symptoms or if you have any health conditions, it&#8217;s always best to talk to a healthcare provider.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Seasonal allergies can be bothersome, leading to symptoms such as an itchy nose, sneezing, runny nose, and itchy eyes. For many people, a dose of Zyrtec (cetirizine HCL) can work wonders for relieving annoying allergy symptoms. It\u2019s a brand-name over-the-counter (OTC) drug that contains cetirizine and works by blocking the effects of histamine, a substance [&hellip;]<\/p>\n","protected":false},"author":149,"featured_media":630999,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4589],"tags":[554,12752,802],"coauthors":[8669],"class_list":["post-630998","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-drug-info","tag-allergies","tag-medication-side-effects","tag-seasonal-allergies","wpautop"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Zyrtec-D side effects and how to avoid them<\/title>\n<meta name=\"description\" content=\"Zyrtec-D side effects include insomnia, dry mouth, nausea, headache, sore throat, and fatigue. 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