{"id":54585,"date":"2022-10-17T12:47:04","date_gmt":"2022-10-17T16:47:04","guid":{"rendered":"https:\/\/www.singlecare.com\/blog\/?p=54585"},"modified":"2024-11-20T10:45:10","modified_gmt":"2024-11-20T15:45:10","slug":"flecainide-side-effects","status":"publish","type":"post","link":"https:\/\/www.singlecare.com\/blog\/flecainide-side-effects\/","title":{"rendered":"Flecainide side effects and how to avoid them"},"content":{"rendered":"<p><span style=\"font-weight: 400;\"><a href=\"#common-flecainide-side-effects\">Common flecainide side effects<\/a> | <a href=\"#serious-side-effects\">Serious side effects<\/a> | <a href=\"#irregular-heartbeat\">Irregular heartbeat<\/a> | <a href=\"#heart-failure\">Heart failure<\/a> | <a href=\"#increased-risk-of-fatal-heart-attack\">Increased risk of fatal heart attack<\/a> |\u00a0 <a href=\"#side-effects-timeline\">Side effects timeline<\/a>\u00a0| <a href=\"#contraindications\">Contraindications<\/a> | <a href=\"#warnings\">Warnings<\/a> | <a href=\"#interactions\">Interactions<\/a> | <a href=\"#how-to-avoid-side-effects\">How to avoid side effects<\/a> | <a href=\"#how-to-treat-side-effects\">How to treat side effects<\/a><\/span><\/p>\n<p><a href=\"https:\/\/www.singlecare.com\/prescription\/flecainide-acetate\"><span style=\"font-weight: 400;\">Flecainide<\/span><\/a><span style=\"font-weight: 400;\"> is a generic prescription drug used to treat or prevent serious and life-threatening heartbeat abnormalities. These abnormalities include chaotic, fast heartbeats of the upper chambers of the heart (paroxysmal <\/span><a href=\"https:\/\/www.singlecare.com\/conditions\/atrial-fibrillation-treatment-and-medications\"><span style=\"font-weight: 400;\">atrial fibrillation<\/span><\/a><span style=\"font-weight: 400;\"> and atrial flutter) and fast or irregular heartbeats of the lower chambers (ventricular tachycardia and other ventricular arrhythmias). As an <\/span><a href=\"https:\/\/www.singlecare.com\/drug-classes\/antiarrhythmics\"><span style=\"font-weight: 400;\">antiarrhythmic<\/span><\/a><span style=\"font-weight: 400;\">, flecainide slows and stabilizes heartbeats by weakening nerve activity.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Although it is an effective drug, flecainide can cause side effects, some of which can be severe. Because of the possibility of severe side effects on the heart, flecainide should only be reserved for serious heart rhythm problems.\u00a0<\/span><\/p>\n<h2 id=\"common-flecainide-side-effects\"><span style=\"font-weight: 400;\">Common side effects of flecainide<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Flecainide can cause various side effects, including side effects on the heart, lungs, and digestive system. Consult a healthcare provider if you experience any side effects or if side effects persist or worsen. The most common side effects of flecainide include:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dizziness, lightheadedness, feeling faint, or unsteadiness<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Visual impairment, such as blurred vision and seeing spots<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Trouble breathing<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Headache<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Nausea<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Fatigue<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Palpitations<\/span><\/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;\">Weakness<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tremor<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Constipation<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Fluid retention and swelling<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Abdominal pain<\/span><\/li>\n<\/ul>\n<h2 id=\"serious-side-effects\"><span style=\"font-weight: 400;\">Serious side effects of flecainide<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Some of the <\/span><a href=\"https:\/\/online.epocrates.com\/drugs\/127105\/flecainide\/Adverse-Reactions\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">most serious side effects of flecainide<\/span><\/a><span style=\"font-weight: 400;\"> include:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">New or worsened arrhythmias<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Heart block<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Heart failure<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cardiac arrest<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Liver problems, such as liver damage or liver failure<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Low blood cell counts<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Lung problems<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Allergic reactions<\/span><\/li>\n<\/ul>\n<h3 id=\"irregular-heartbeat\"><span style=\"font-weight: 400;\">Flecainide and irregular heartbeats<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">One important thing to know is that flecainide, an antiarrhythmic, can have proarrhythmic effects. That is, flecainide can cause arrhythmias or irregular heartbeats even though it\u2019s prescribed to treat irregular heartbeats. In some people, the drug may cause worsened or new irregular heartbeats, which can be life-threatening. Heart rhythm changes can include PR, QRS, and QT prolongation.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The incidence of new or worsened arrhythmias in clinical trials ranges from <\/span><a href=\"https:\/\/docs.boehringer-ingelheim.com\/Prescribing%20Information\/PIs\/Roxane\/Flecainide%20Acetate\/Flecainide%20Acetate%20Tablets.pdf\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">1% to 7%<\/span><\/a><span style=\"font-weight: 400;\"> of patients, depending on the underlying condition being treated. About 80% of heart rhythm problems occur in the first two weeks of treatment for a certain type of ventricular arrhythmia. To prevent serious problems, healthcare professionals typically start flecainide treatment in a hospital where they can monitor the heart and intervene if there\u2019s trouble. People who take flecainide at home are recommended to keep up with regular office visits to monitor heart rate and heart rhythm.\u00a0<\/span><\/p>\n<h3 id=\"heart-failure\"><span style=\"font-weight: 400;\">Flecainide and heart failure<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The use of flecainide also carries a risk of new or worsened <\/span><a href=\"https:\/\/www.singlecare.com\/conditions\/congestive-heart-failure-treatment-and-medications\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">heart failure<\/span><\/a><span style=\"font-weight: 400;\">, a condition in which the heart cannot pump enough blood to the body. Heart failure is not uncommon in people with arrhythmias. In clinical trials, the incidence of new or worsened heart failure ranges from <\/span><a href=\"https:\/\/docs.boehringer-ingelheim.com\/Prescribing%20Information\/PIs\/Roxane\/Flecainide%20Acetate\/Flecainide%20Acetate%20Tablets.pdf\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">0.4% to 26%<\/span><\/a><span style=\"font-weight: 400;\"> of participants, depending on the heart condition being treated and whether the patient has pre-existing heart failure. It is important for people taking flecainide to be familiar with the symptoms of heart failure and immediately report them to the prescriber or other healthcare professional.<\/span><\/p>\n<h3 id=\"increased-risk-of-fatal-heart-attack\"><span style=\"font-weight: 400;\">Increased risk of death after a heart attack<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">According to results from the National Heart Lung and Blood Institute\u2019s Cardiac Arrhythmia Suppression Trial (CAST), the use of flecainide may cause an increased risk of death or cardiac arrest in certain patients. An increased risk of death was observed in patients who experienced a recent heart attack. Consult a healthcare provider for appropriate treatment options before taking flecainide after a recent heart attack.\u00a0<\/span><\/p>\n<h2 id=\"side-effects-timeline\"><span style=\"font-weight: 400;\">How soon do flecainide side effects start?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Flecainide begins affecting the heart after the very first dose. Many of flecainide\u2019s most common side effects, such as dizziness, headache, fatigue, stomach pain, and tremor, occur early in treatment. Heart rhythm problems have mostly occurred during the first two weeks of treatment for sustained ventricular tachycardia. However, rapid or slow heartbeats may occur after taking the first dose. Other serious side effects, including liver problems, lung problems, and blood cell problems, may develop within a few days, a few weeks, or longer.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">How long do flecainide side effects last?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Mild side effects generally subside over time as the body gets used to the medication. Those that don\u2019t typically resolve once the medicine is stopped. However, flecainide is often taken with other heart medicines. Some of the problems caused by flecainide may persist while continuing or switching to similar medications. Heart problems may require that flecainide be stopped.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">What are the long-term side effects of flecainide?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Flecainide treatment is usually long-term and can last for months. While flecainide is not linked to serious long-term side effects, worsening heart failure symptoms, for example, may be more likely to develop in people with pre-existing heart failure. <\/span><a href=\"https:\/\/www.researchgate.net\/publication\/246426009_Diffuse_Infiltrative_Lung_Disease_Associated_with_Flecainide\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">Some clinical studies<\/span><\/a><span style=\"font-weight: 400;\"> have suggested that long-term use may cause various types of lung diseases, including inflammation in the lungs (pneumonitis) and scarring (fibrosis). However, <\/span><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC6342725\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">other clinical studies<\/span><\/a><span style=\"font-weight: 400;\"> have found that lung problems can start early in flecainide treatment.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\t\t<div class=\"singlecare-dynamic-newsletter-wrapper sin-newsletter-wrapper\">\n\t\t\t<span class=\"heading\">Get our heart health newsletter<\/span>\n\t\t\t<form class=\"form-wrapper\" data-newsletter-form=\"1\" data-subsource=\"Heart Health Newsletter\">\n\t\t\t\t<div class=\"input-wrapper\">\n\t\t\t\t\t<label for=\"dynamic-email\">Email<\/label>\n\t\t\t\t\t<input type=\"email\" id=\"dynamic-email\" class=\"email\" required>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"input-wrapper\">\n\t\t\t\t\t<input class=\"submit-form-btn\" type=\"submit\" value=\"Click to sign up\">\n\t\t\t\t<\/div>\n\t\t\t<\/form>\n\t\t\t<p class=\"success-message\" role=\"status\" aria-live=\"polite\"><\/p>\n\t\t<\/div>\n\t<\/span><\/p>\n<h2 id=\"contraindications\"><span style=\"font-weight: 400;\">Flecainide contraindications<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Flecainide should be avoided in people with:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Second- or third-degree heart block (also known as AV block)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Right bundle branch block when associated with left hemiblock (bifascicular block) except in people with a pacemaker<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cardiogenic shock (an acute, life-threatening condition in which the heart is unable to pump enough blood to the body)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A known allergic reaction to flecainide<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">Pregnancy<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Flecainide is only used during pregnancy if the benefits outweigh the risks. Flecainide has been shown to cause birth defects in animal studies, but there are no sufficient studies on the use of flecainide in pregnant women. It is not known if flecainide affects newborns if taken near the end of pregnancy.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Breastfeeding<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Flecainide has been shown to pass into human breast milk. Nursing infants may receive a small dose. <\/span><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK500688\/#:~:text=Summary%20of%20Use%20during%20Lactation,is%20older%20than%202%20months.\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">Studies<\/span><\/a><span style=\"font-weight: 400;\"> suggest that there is a low risk of side effects in a nursing infant, especially if it is older than two months.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Children<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The FDA has approved flecainide as safe and effective for use in children and infants. Because of potential problems, it is recommended that flecainide be started in the hospital under the supervision of a cardiologist who has expertise in child arrhythmias.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Seniors<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Flecainide can be used safely in older adults. However, because people older than 65 are more likely to have liver or kidney problems than other people, the risk of adverse effects may be higher in elderly adults. Close monitoring may be required in seniors taking flecainide.<\/span><\/p>\n<h2 id=\"warnings\"><span style=\"font-weight: 400;\">Flecainide warnings<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">The label of flecainide highlights several warnings, including those of proarrhythmic effects. It is important to take flecainide only as prescribed at the appropriate dosage determined by a healthcare provider. Close supervision and monitoring are generally recommended to avoid serious problems with flecainide.\u00a0<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Black box warning<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The FDA adds <\/span><a href=\"https:\/\/www.singlecare.com\/blog\/black-box-warning\/\"><span style=\"font-weight: 400;\">black box warnings<\/span><\/a><span style=\"font-weight: 400;\"> to a drug if there is a high risk of serious problems. Black box warnings are not severe enough to ban the drug but severe enough to warn healthcare providers and patients about potential problems. Flecainide carries a warning about possible side effects on the heart:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Flecainide may increase the risk of death or nonfatal cardiac arrest in people who have had a heart attack within two years of the start of flecainide treatment.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Because of its proarrhythmic effects, flecainide is only appropriate for life-threatening heart rhythm problems. It should be avoided in people with chronic atrial fibrillation.\u00a0<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">Cautions<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Because flecainide can cause serious heart problems, pre-existing heart conditions may be worsened by the drug. In these cases, extra caution and monitoring may be required. <\/span><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK542291\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">Patients with the following conditions<\/span><\/a><span style=\"font-weight: 400;\"> should consult their healthcare provider before taking flecainide:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Structural heart disease (such as heart valve defects or heart muscle disease)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Congestive heart failure<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">QT prolongation<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Electrolyte disturbances<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">An implanted pacemaker<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Liver or kidney problems<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Electrolyte imbalances can increase the risk of heartbeat abnormalities. In particular, low potassium or low magnesium must be corrected before flecainide can be safely taken.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">People with liver dysfunction or moderate to severe kidney disease may need reduced doses. Otherwise, the drug could build up in the body, causing an increased risk of side effects.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Abuse and dependence<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Flecainide is not linked to physical dependence, nor is it associated with drug abuse or misuse.\u00a0<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Overdose<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Call a poison control center or seek medical help if too much flecainide is taken. The maximum daily dosage is 300 mg per day for patients with paroxysmal supraventricular arrhythmias and 400 mg per day for patients with sustained ventricular tachycardia. The most appropriate dosage will depend on the condition being treated. In general, the lowest effective dose is recommended to prevent side effects.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The most common symptoms of a flecainide overdose are nausea, vomiting, low blood pressure (hypotension), slow heartbeat (bradycardia), fainting (syncope), convulsions, and heart rhythm changes. Severe and even life-threatening heart rhythm problems and heart attacks are possible after an overdose.<\/span><\/p>\n<h2 id=\"interactions\"><span style=\"font-weight: 400;\">Flecainide interactions<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Flecainide should be used with caution with certain drugs. Some drug combinations involving flecainide should be avoided entirely. Consult a healthcare provider if you are taking other medications, including prescription drugs, over-the-counter medicine, or herbal supplements, before taking flecainide. Drugs that interact with flecainide include:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\">Other antiarrhythmic drugs, such as <\/span><a href=\"https:\/\/www.singlecare.com\/prescription\/amiodarone-hcl\"><span style=\"font-weight: 400;\">amiodarone<\/span><\/a><span style=\"font-weight: 400;\"> and <\/span><a href=\"https:\/\/www.singlecare.com\/prescription\/quinidine-sulfate\"><span style=\"font-weight: 400;\">quinidine<\/span><\/a><\/li>\n<li><span style=\"font-weight: 400;\">Certain antipsychotic medications, such as <\/span><a href=\"https:\/\/www.singlecare.com\/prescription\/thioridazine-hcl\"><span style=\"font-weight: 400;\">thioridazine<\/span><\/a><span style=\"font-weight: 400;\"> and <\/span><a href=\"https:\/\/www.singlecare.com\/prescription\/pimozide\"><span style=\"font-weight: 400;\">pimozide<\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.singlecare.com\/drug-classes\/beta-blockers\"><span style=\"font-weight: 400;\">Beta blockers<\/span><\/a><span style=\"font-weight: 400;\">, such as <\/span><a href=\"https:\/\/www.singlecare.com\/prescription\/sotalol-hcl\"><span style=\"font-weight: 400;\">sotalol<\/span><\/a><span style=\"font-weight: 400;\"> and <\/span><a href=\"https:\/\/www.singlecare.com\/prescription\/propranolol-hcl\"><span style=\"font-weight: 400;\">propranolol<\/span><\/a><span style=\"font-weight: 400;\">\u00a0<\/span><\/li>\n<li><a href=\"https:\/\/www.singlecare.com\/drug-classes\/calcium-channel-blockers\"><span style=\"font-weight: 400;\">Calcium channel blockers<\/span><\/a><span style=\"font-weight: 400;\">, such as <\/span><a href=\"https:\/\/www.singlecare.com\/prescription\/verapamil-hcl\"><span style=\"font-weight: 400;\">verapamil<\/span><\/a><\/li>\n<li><span style=\"font-weight: 400;\">Cardiac glycosides, such as <\/span><a href=\"https:\/\/www.singlecare.com\/prescription\/digoxin\"><span style=\"font-weight: 400;\">digoxin<\/span><\/a><\/li>\n<li><span style=\"font-weight: 400;\">Certain antibiotics, such as clarithromycin and erythromycin<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Certain antifungals, such as fluconazole and voriconazole<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Selective serotonin reuptake inhibitors (SSRIs), such as fluoxetine, paroxetine, and citalopram<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Certain anticonvulsants, such as phenytoin, phenobarbital, and carbamazepine<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Certain antiviral drugs, such as ritonavir and saquinavir<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Certain stomach acid reducers, such as <\/span><a href=\"https:\/\/www.singlecare.com\/prescription\/cimetidine-hcl\"><span style=\"font-weight: 400;\">cimetidine<\/span><\/a><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Other drug interactions are possible, as this is not a complete list. Talk to your healthcare provider about other possible drug interactions. Your healthcare provider may recommend adjusting doses or monitoring for increased side effects when taking specific medications with flecainide.\u00a0<\/span><\/p>\n<h2 id=\"how-to-avoid-side-effects\"><span style=\"font-weight: 400;\">How to avoid flecainide side effects<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Flecainide is generally reserved for serious heart problems because of the risk of serious side effects. For some people, the risks of taking flecainide outweigh its benefits. However, for many people, the side effects of flecainide are avoidable with the right guidance.\u00a0<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">1. Follow all instructions\u00a0<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The most important rule is to use flecainide as directed. Your prescriber will advise you on how much to take and when to take each dose of flecainide. Your healthcare provider may also provide other instructions to ensure the drug is taken safely and effectively. Always consult your healthcare provider if you have any concerns about taking the medication correctly.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">2. Set dose reminders<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Missing a dose or taking too much flecainide can be a problem. Ask your pharmacist for tools that can help you keep track of the dosing schedule. These tools may include diaries, calendars, smartphone apps, or pill-bottle alarms.\u00a0<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">3. Don\u2019t take a double dose<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The risk of possible side effects, including serious ones, is higher if too much medicine is taken. Don\u2019t take a double dose to make up for a missed dose. If you miss a dose, you can take it when you remember. However, if it\u2019s almost time for the next dose, skip the missed dose. Keep to the schedule and take the next dose when it\u2019s due.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">4. Get support from a loved one<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">If you have trouble taking or remembering to take your medicine, ask a family member or friend for support. They may be able to help remind you when and how to take your medication.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">5. Tell the prescriber about all medical conditions you have<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Before you start treatment, you should tell your healthcare provider your complete medical history. In most cases, flecainide will be prescribed by a cardiologist who is skilled in treating arrhythmias and has ordered any necessary tests, such as an electrocardiogram (ECG). You should tell your healthcare provider about any pre-existing medical conditions you have, such as:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Heart rhythm problems<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Chronic atrial fibrillation<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A heart attack in the last two years<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Heart failure<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Electrolyte imbalances<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Liver disease<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Pregnancy or any plans to become pregnant<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Breastfeeding or plans to breastfeed<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">6. Tell the prescriber about other medication you take<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Drug interactions are another source of flecainide adverse effects, so the prescriber should have a complete picture of all the prescription drugs, over-the-counter medicines, and dietary supplements that you take. Some medications or doses may need to be changed or adjusted.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">8. Don\u2019t skip follow-up visits<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Regular ECGs, blood tests, or other monitoring tests are often necessary to make sure flecainide is working and not causing any problems. Stick with your follow-up appointments with your doctor to ensure you\u2019re taking the medication safely and correctly.\u00a0<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">9. Don\u2019t stop taking flecainide<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Don\u2019t stop taking flecainide unless told to do so by your healthcare provider.\u00a0<\/span><\/p>\n<h2 id=\"how-to-treat-side-effects\"><span style=\"font-weight: 400;\">How to treat side effects of flecainide<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Minor side effects usually resolve on their own, but it is important that the prescriber knows about any side effects you experience when taking flecainide. Even though a side effect may seem trivial, it might be a sign of a more serious problem. Report any side effects you\u2019ve experienced at each follow-up visit. If you experience persistent or serious side effects, contact the prescriber immediately or get emergency medical help.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Dizziness or lightheadedness<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">If you feel dizzy or unsteady, you can sit down until it stops. Stand up slowly when the spinning stops. You can report dizziness or feeling faint to the prescriber, especially if it comes on suddenly or doesn\u2019t seem to go away.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Heart problems<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Contact the prescriber immediately or get emergency medical help if you experience a fast, pounding heartbeat (palpitations), slow heartbeat, chest pain, sudden or unexplained dizziness, weak pulse, or shortness of breath.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Heart failure<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">New or worsening heart failure symptoms can develop while taking flecainide. You should tell your healthcare provider about any symptoms of heart failure you experience. The most prominent symptoms of heart failure are swelling in the arms or legs, rapid weight gain, and trouble breathing. Symptoms of heart failure can appear within a few hours to a few months after starting treatment.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Liver dysfunction<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Contact your healthcare provider if you experience signs or symptoms of liver problems, such as:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Upper right abdominal pain<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dark-colored urine<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Yellowing of the skin or eyes\u00a0<\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Common flecainide side effects | Serious side effects | Irregular heartbeat | Heart failure | Increased risk of fatal heart attack |\u00a0 Side effects timeline\u00a0| Contraindications | Warnings | Interactions | How to avoid side effects | How to treat side effects Flecainide is a generic prescription drug used to treat or prevent serious and [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":54587,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4589],"tags":[737,12752],"coauthors":[8861],"class_list":["post-54585","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-drug-info","tag-heart-health","tag-medication-side-effects","wpautop"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.8 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Flecainide side effects and how to avoid them | SingleCare<\/title>\n<meta name=\"description\" content=\"Irregular heartbeats, heart failure, and an increased risk of death after a heart attack are common flecainide side effects. 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