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Betapace

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Betapace




Indications
Dosage
How Supplied

INDICATIONS

Life-Threatening Ventricular Arrhythmias

Betapace/Betapace AF is indicated for the treatment of life-threatening, documented ventricular arrhythmias, such as sustained ventricular tachycardia (VT).

Limitation Of Use

Betapace/Betapace AF may not enhance survival in patients with ventricular arrhythmias. Because of the proarrhythmic effects of Betapace/Betapace AF, including a 1.5 to 2% rate of Torsade de Pointes (TdP) or new ventricular tachycardia/fibrillation (VT/VF) in patients with either non-sustained ventricular tachycardia (NSVT) or supraventricular arrhythmias (SVT), its use in patients with less severe arrhythmias, even if the patients are symptomatic, is generally not recommended. Avoid treatment of patients with asymptomatic ventricular premature contractions [see WARNINGS AND PRECAUTIONS]

Delay In Recurrence Of Atrial Fibrillation/Atrial Flutter (AFIB/AFL)

Betapace/Betapace AF is indicated for the maintenance of normal sinus rhythm (delay in time to recurrence of AFIB/AFL) in patients with symptomatic AFIB/AFL who are currently in sinus rhythm.

Limitation Of Use

Because Betapace/Betapace AF can cause life-threatening ventricular arrhythmias, reserve its use for patients in whom AFIB/AFL is highly symptomatic. Patients with paroxysmal AFIB that is easily reversed (by Valsalva maneuver, for example) should usually not be given Betapace/Betapace AF.

DOSAGE AND ADMINISTRATION

General Safety Measures For Initiation Of Oral Sotalol Therapy

Withdraw other antiarrhythmic therapy before starting Betapace/Betapace AF and monitor carefully for a minimum of 2 to 3 plasma half-lives if the patient's clinical condition permits [see DRUG INTERACTIONS].

Hospitalize patients initiated or re-initiated on sotalol for at least 3 days or until steady-state drug levels are achieved, in a facility that can provide cardiac resuscitation and continuous electrocardiographic monitoring. Initiate oral sotalol therapy in the presence of personnel trained in the management of serious arrhythmias. Perform a baseline ECG to determine the QT interval and measure and normalize serum potassium and magnesium levels before initiating therapy. Measure serum creatinine and calculate an estimated creatinine clearance in order to establish the appropriate dosing interval (insert cross ref to renal dosing). Continually monitor patients with each uptitration in dose, until they reach steady state. Determine QTc 2 to 4 hours after every dose.

Discharge patients on sotalol therapy from an in-patient setting with an adequate supply of sotalol to allow uninterrupted therapy until the patient can fill a sotalol prescription.

Advise patients who miss a dose to take the next dose at the usual time. Do not double the dose or shorten the dosing interval.

Adult Dose For Ventricular Arrhythmias

The recommended initial dose is 80 mg twice daily. This dose may be increased in increments of 80 mg per day every 3 days provided the QTc < 500 msec [see WARNINGS AND PRECAUTIONS]. Continually monitor patients until steady state blood levels are achieved. In most patients, a therapeutic response is obtained at a total daily dose of 160 to 320 mg/day, given in two or three divided doses (because of the long terminal elimination half-life of sotalol, dosing more than a two times a day is usually not necessary). Oral doses as high as 480-640 mg/day have been utilized in patients with refractory life-threatening arrhythmias.

Adult Dose For Prevention Of Recurrence Of AFIB/AFL

The recommended initial dose is 80 mg twice daily. This dose may be increased in increments of 80 mg per day every 3 days provided the QTc < 500 msec [see WARNINGS AND PRECAUTIONS]. Continually monitor patients until steady state blood levels are achieved. Most patients will have satisfactory response with 120 mg twice daily. Initiation of sotalol in patients with creatinine clearance < 40 ml/min or QTc > 450 is contraindicated [see CONTRAINDICATIONS].

Pediatric Dose For Ventricular Arrhythmias Or AFIB/AFL

Use the same precautionary measures for children as you would use for adults when initiating and re-initiating sotalol treatment.

For Children Aged About 2 Years And Older

For children aged about 2 years and older, with normal renal function, doses normalized for body surface area are appropriate for both initial and incremental dosing. Since the Class III potency in children is not very different from that in adults, reaching plasma concentrations that occur within the adult dose range is an appropriate guide [see CLINICAL PHARMACOLOGY].

From pediatric pharmacokinetic data the following is recommended:

For initiation of treatment, 30 mg/m² three times a day (90 mg/m² total daily dose) is approximately equivalent to the initial 160 mg total daily dose for adults. Subsequent titration to a maximum of 60 mg/m² (approximately equivalent to the 360 mg total daily dose for adults) can then occur. Titration should be guided by clinical response, heart rate and QTc, with increased dosing being preferably carried out in-hospital. At least 36 hours should be allowed between dose increments to attain steady-state plasma concentrations of sotalol in patients with age-adjusted normal renal function.

For Children Aged About 2 Years Or Younger

For children aged about 2 years or younger, the above pediatric dosage should be reduced by a factor that depends heavily upon age, as shown in the following graph, age plotted on a logarithmic scale in months.

Pediatric dosage chart - Illustration

For a child aged 20 months, the dosing suggested for children with normal renal function aged 2 years or greater should be multiplied by about 0.97; the initial starting dose would be (30 X 0.97)=29.1 mg/m², administered three times daily. For a child aged 1 month, the starting dose should be multiplied by 0.68; the initial starting dose would be (30 X 0.68)=20 mg/m², administered three times daily. For a child aged about 1 week, the initial starting dose should be multiplied by 0.3; the starting dose would be (30 X 0.3)=9 mg/m². Use similar calculations for dose titration.

Since the half-life of sotalol decreases with decreasing age (below about 2 years), time to steady-state will also increase. Thus, in neonates the time to steady-state may be as long as a week or longer.

Dosage For Patients With Renal Impairment

Adults

Use of sotalol in any age group with decreased renal function should be at lower doses or increased intervals between doses. It will take much longer to reach steady-state with any dose and/or frequency of administration. Closely monitor heart rate and QTc.

Dose escalations in renal impairment should be done after administration of at least 5 doses at appropriate intervals (Table 1). Sotalol is partly removed by dialysis; specific advice is unavailable on dosing patients on dialysis.

The initial dose of 80 mg and subsequent doses should be administered at the intervals listed in Table 1 or Table 2.

Table 1: Dosing Intervals for treatment of Ventricular Arrhythmias in renal impairment

Creatinine Clearance mL/min Dosing Interval (hours)
> 60 12
30-59 24
10-29 36-48
< 10 Dose should be individualized

Table 2: Dosing Intervals for treatment of AFIB/AFL in renal impairment

Creatinine Clearance mL/min Dosing Interval (hours)
> 60 12
40-59 24
< 40 Contraindicated

Preparation Of Extemporaneous Oral Solution

Betapace/Betapace AF Syrup 5 mg/mL can be compounded using Simple Syrup containing 0.1% sodium benzoate (Syrup, NF) as follows:

  1. Measure 120 mL of Simple Syrup.
  2. Transfer the syrup to a 6-ounce amber plastic (polyethylene terephthalate [PET]) prescription bottle. An oversized bottle is used to allow for a headspace, so that there will be more effective mixing during shaking of the bottle.
  3. Add five (5) Betapace/Betapace AF 120 mg tablets to the bottle. These tablets are added intact; it is not necessary to crush the tablets. The addition of the tablets can also be done first. The tablets can also be crushed if preferred. If the tablets are crushed, care should be taken to transfer the entire quantity of tablet powder into the bottle containing the syrup.
  4. Shake the bottle to wet the entire surface of the tablets. If the tablets have been crushed, shake the bottle until the endpoint is achieved.
  5. Allow the tablets to hydrate for at least two hours.
  6. After at least two hours have elapsed, shake the bottle intermittently over the course of at least another two hours until the tablets are completely disintegrated. The tablets can be allowed to hydrate overnight to simplify the disintegration process.

The endpoint is achieved when a dispersion of fine particles in the syrup is obtained.

This compounding procedure results in a solution containing 5 mg/mL of sotalol HCl. The fine solid particles are the water-insoluble inactive ingredients of the tablets.

Stability studies indicate that the suspension is stable for three months when stored at 15°C to 30°C (59°F to 86°F) [see USP Controlled Room Temperature] and ambient humidity.

HOW SUPPLIED

Dosage Forms And Strengths

Betapace is supplied as capsule-shaped, light-blue, scored tablets:

  • 80 mg imprinted with “BETAPACE” on one side and 80 mg on the other
  • 120 mg imprinted with “BETAPACE” on one side and 120 mg on the other
  • 160 mg imprinted with “BETAPACE” on one side and 160 mg on the other

Betapace AF is supplied as capsule-shaped, white scored tablet:

  • 80 mg imprinted with “BHCP” on one side and 80 mg on the other
  • 120 mg imprinted with “BHCP” on one side and 120 mg on the other
  • 160 mg imprinted with “BHCP” on one side and 160 mg on the other

Storage And Handling

Betapace (sotalol hydrochloride); capsule-shaped light-blue scored tablets, imprinted with the strength and “BETAPACE,” are available as follows:

NDC 70515-105-10 80 mg strength, bottle of 100
NDC
70515-109-10 120 mg strength, bottle of 100
NDC 70515-106-10 160 mg strength, bottle of 100

Betapace AF (sotalol hydrochloride); capsule-shaped white scored tablets, imprinted with the strength and “BHCP” are available as follows:

NDC 70515-115-06 80 mg strength, bottle of 60
NDC
70515-119-06 120 mg strength, bottle of 60
NDC 70515-116-06 160 mg strength, bottle of 60

Store at 25°C (77°F); excursions permitted to 15-30°C (59–86°F) [See USP Controlled Room Temperature].

Manufactured for: Covis Pharma Zug, 6300 Switzerland. Made in Finland. Revised: May 2016

This monograph has been modified to include the generic and brand name in many instances.

Last reviewed on RxList: 5/23/2016

Indications
Dosage
How Supplied

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