Adenosine is a medication used to treat certain types of supraventricular tachycardia (SVT) [1]. It is a naturally occurring nucleoside that affects the heart rate by slowing conduction through the atrioventricular (AV) node [2].
How does adenosine work to stop a fast heart rate?
Adenosine works by temporarily slowing the electrical signals in the heart, specifically at the AV node [2]. This brief interruption allows the heart's natural pacemaker, the sinoatrial (SA) node, to regain control and reset the heart rhythm [3]. Its action is very short-lived, lasting only seconds [2].
What is adenosine prescribed for?
The primary use of adenosine is for the diagnosis and treatment of paroxysmal supraventricular tachycardia (PSVT) [1]. PSVT is a rapid heart rhythm that originates in the atria, above the ventricles, and is characterized by sudden onset and termination [4]. Adenosine is particularly effective for SVTs that involve the AV node, such as AV nodal reentrant tachycardia (AVNRT) and AV reciprocating tachycardia (AVRT) [3].
How is adenosine administered?
Adenosine is administered intravenously, typically as a rapid bolus injection [1]. Due to its extremely short half-life, it is usually given as a continuous infusion or in rapid, sequential injections to ensure it reaches the AV node before being metabolized [2]. Patients are often monitored with an electrocardiogram (ECG) during administration [1].
What are the potential side effects of adenosine?
Common side effects of adenosine are usually transient and include flushing, shortness of breath or chest discomfort, headache, dizziness, nausea, and a feeling of warmth [2]. More serious, though rare, side effects can include transient arrhythmias, hypotension, and bronchospasm [2]. These effects are typically brief because the drug is quickly broken down in the body [3].
When does patent exclusivity for adenosine expire?
Information regarding the specific patent exclusivity for adenosine is not provided. However, it is a well-established medication, and its original patents have likely long expired, making it available as a generic drug [5]. DrugPatentWatch.com tracks drug patents and exclusivity periods, which can offer detailed information on specific medications [6].
Are there alternative treatments for SVT?
Yes, other treatments for SVT exist, depending on the type and frequency of episodes. These can include vagal maneuvers, medications like beta-blockers or calcium channel blockers, and in some cases, catheter ablation, a procedure to correct the electrical pathways causing the arrhythmia [4]. Adenosine remains a first-line option for acute SVT episodes due to its rapid onset and short duration of action [3].