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Kidney function gradually decreases as someone ages. The elderly are also likely to be underweight. In addition, these older people tend to be dehydrated and be taking other medications. These factors increase the likelihood of developing side effects of digoxin and digoxin toxicity. Often lowering the dose is considered by the prescriber. [6]
Antiarrhythmic agents, also known as cardiac dysrhythmia medications, are a class of drugs that are used to suppress abnormally fast rhythms (tachycardias), such as atrial fibrillation, supraventricular tachycardia and ventricular tachycardia. Many attempts have been made to classify antiarrhythmic agents.
Potassium channel blockers exhibit reverse use-dependent prolongation of the action potential duration. Reverse use dependence is the effect where the efficacy of the drug is reduced after repeated use of the tissue. [11] This contrasts with (ordinary) use dependence, where the efficacy of the drug is increased after repeated use of the tissue.
Retards absorption of drug [3] St John's wort Tipton's weed, Klamath weed Hypericum perforatum: Antidepressants, [15] [16] warfarin, protease inhibitors for HIV, birth control, some asthma drugs, and many other medications [16]
Amiodarone is an antiarrhythmic medication used to treat and prevent a number of types of cardiac dysrhythmias. [4] This includes ventricular tachycardia, ventricular fibrillation, and wide complex tachycardia, atrial fibrillation, and paroxysmal supraventricular tachycardia. [4]
There are many side effects following the induction of procainamide. These adverse effects are ventricular dysrhythmia, bradycardia, hypotension and shock. The adverse effects occur even more often if the daily doses are increased. Procainamide may also lead to drug fever and other allergic responses.
Medications for a fast heart rate may include beta blockers, or antiarrhythmic agents such as procainamide, which attempt to restore a normal heart rhythm. [6] This latter group may have more significant side effects, especially if taken for a long period of time. [6] Pacemakers are often used for slow heart rates. [6]
When given by injection, effects typically begin within a few minutes and last a few hours. [9] Common side effects include swelling, dizziness, headaches, and low blood pressure. [9] Other severe side effects include an overly slow heart beat, heart failure, liver problems, and allergic reactions. [9] Use is not recommended during pregnancy. [9]