Butorphic

Butorphic Manufacturers

• Akorn Animal Health, Inc.
  

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  Butorphic | Akorn Animal Health, Inc.

  

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  The recommended dosage in the horse is 0.1 mg of butorphanol per kilogram of body weight (0.05 mg/lb) by intravenous injection. This is equivalent to 5 mL of Butorphic Injection for each 1000 lbs body weight. The dose may be repeated within 3 to 4 hours but treatment should not exceed 48 hours. Pre-clinical model studies and clinical field trials in horses demonstrate that the analgesic effects of Butorphic Injection are seen within 15 minutes following injection and persist for about 4 hours.

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• Lloyd Inc Of Iowa
  

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  Butorphic | Lloyd Inc Of Iowa

  

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  The recommended dosage in the horse is 0.1 mg of butorphanol per kilogram of body weight (0.05 mg/lb) by intravenous injection. This is equivalent to 5 mL of Butorphic Injection for each 1000 lbs body weight. The dose may be repeated within 3 to 4 hours but treatment should not exceed 48 hours. Pre-clinical model studies and clinical field trials in horses demonstrate that the analgesic effects of Butorphic Injection are seen within 15 minutes following injection and persist for about 4 hours.

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• Henry Schein Animal Health
  

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  Butorphic | Proficient Rx Lp

  

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  Table 1. Recommended Daily Dosage by Indication Initial Dose Titration
  (Increments) Target Dose Effective
  Dose Range

  Schizophrenia: adults (2.1)
  

  2 mg
  

  1 to 2 mg
  

  4 to 8 mg
  

  4 to 16 mg
  

  Schizophrenia: adolescents (2.2)
  

  0.5 mg
  

  0.5 to 1 mg
  

  3 mg
  

  1 to 6 mg
  

  Bipolar mania: adults (2.2)
  

  2 to 3 mg
  

  1 mg
  

  1 to 6 mg
  

  1 to 6 mg
  

  Bipolar mania: children and adolescents (2.2)
  

  0.5 mg
  

  0.5 to 1 mg
  

  1 to 2.5 mg
  

  1 to 6 mg
  

  Irritability in autistic disorder (2.3)
  

  0.25 mg
  Can increase to
  0.5 mg by Day 4:
  (body weight less
  than 20 kg) 
   
  0.5 mg
  Can increase to
   1 mg by Day 4:
   (body weight
  greater than or
  equal to 20 kg)
  

  After Day 4,
   at Interval of > 2 weeks:
  0.25 mg
  (body weight less
  than 20 kg)
    
  0.5 mg
   (body weight
  greater than or
  equal to 20 kg)
  

  0.5 mg:
  (body weight less
  than 20 kg)
    
  1 mg:
  (body weight
  greater than or
  equal to 20 kg)
  

  0.5 to 3 mg
  

  Severe Renal and Hepatic Impairment in Adults: use a lower starting dose of 0.5 mg twice daily.

  May increase to dosages above 1.5 mg twice daily at intervals of at one week or longer

  2.1 Schizophrenia

  Adults

  Usual Initial Dose

  Risperidone tablets can be administered once or twice daily. Initial dosing is 2 mg per day. May increase the dose at intervals of 24 hours or greater, in increments of 1 to 2 mg per day, as tolerated, to a recommended dose of 4 to 8 mg per day. In some patients, slower titration may be appropriate. Efficacy has been demonstrated in a range of 4 mg to 16 mg per day. However, doses above 6 mg per day for twice daily dosing were not demonstrated to be more efficacious than lower doses, were associated with more extrapyramidal symptoms and other adverse effects, and are generally not recommended. In a single study supporting once-daily dosing, the efficacy results were generally stronger for 8 mg than for 4 mg. The safety of doses above 16 mg per day has not been evaluated in clinical trials [see Clinical Studies (14.1)].

  Adolescents

  The initial dose is 0.5 mg once daily, administered as a single-daily dose in the morning or evening. The dose may be adjusted at intervals of 24 hours or greater, in increments of 0.5 mg or 1 mg per day, as tolerated, to a recommended dose of 3 mg per day. Although efficacy has been demonstrated in studies of adolescent patients with schizophrenia at doses between 1 mg and 6 mg per day, no additional benefit was seen above 3 mg per day, and higher doses were associated with more adverse events. Doses higher than 6 mg per day have not been studied.

  Patients experiencing persistent somnolence may benefit from administering half the daily dose twice daily.

  Maintenance Therapy

  While it is unknown how long a patient with schizophrenia should remain on risperidone tablets, the effectiveness of risperidone tablets 2 mg per day to 8 mg per day at delaying relapse was demonstrated in a controlled trial in adult patients who had been clinically stable for at least 4 weeks and were then followed for a period of 1 to 2 years [see Clinical Studies (14.1)]. Both adult and adolescent patients who respond acutely should generally be maintained on their effective dose beyond the acute episode. Patients should be periodically reassessed to determine the need for maintenance treatment.

  Reinitiation of Treatment in Patients Previously Discontinued

  Although there are no data to specifically address reinitiation of treatment, it is recommended that after an interval off risperidone tablets, the initial titration schedule should be followed.

  Switching From Other Antipsychotics

  There are no systematically collected data to specifically address switching schizophrenic patients from other antipsychotics to risperidone tablets, or treating patients with concomitant antipsychotics.

  2.2 Bipolar Mania

  Usual Dose

  Adults

  The inital dose range is 2 mg to 3 mg per day. The dose may be adjusted at intervals of 24 hours or greater, in increments of 1 mg per day. The effective dose range is 1 mg to 6 mg per day, as studied in the short-term, placebo-controlled trials. In these trials, short-term (3 week) anti-manic efficacy was demonstrated in a flexible dosage range of 1 mg to 6 mg per day [see Clinical Studies (14.2,14.3)]. Risperidone tablets doses higher than 6 mg per day were not studied.

  Pediatrics

  The inital dose is 0.5 mg once daily, administered as a single-daily dose in the morning or evening. The dose may be adjusted at intervals of 24 hours or greater, in increments of 0.5 mg or 1 mg per day, as tolerated, to the recommended target dose of 1 mg to 2.5 mg per day. Although efficacy has been demonstrated in studies of pediatric patients with bipolar mania at doses between 0.5 mg and 6 mg per day, no additional benefit was observed above 2.5 mg per day, and higher doses were associated with more adverse events. Doses higher than 6 mg per day have not been studied.

  Patients experiencing persistent somnolence may benefit from administering half the daily dose twice daily.

  Maintenance Therapy

  There is no body of evidence available from controlled trials to guide a clinician in the longer-term management of a patient who improves during treatment of an acute manic episode with risperidone tablets. While it is generally agreed that pharmacological treatment beyond an acute response in mania is desirable, both for maintenance of the initial response and for prevention of new manic episodes, there are no systematically obtained data to support the use of risperidone tablets in such longer-term treatment (i.e., beyond 3 weeks). The physician who elects to use risperidone tablets for extended periods should periodically re-evaluate the long-term risks and benefits of the drug for the individual patient.

  2.3 Irritability Associated with Autistic Disorder - Pediatrics (Children and Adolescents)

  The dosage of risperidone tablets should be individualized according to the response and tolerability of the patient. The total daily dose of risperidone tablets can be administered once daily, or half the total daily dose can be administered twice daily.

  For patients with body weight less than 20 kg, initiate dosing at 0.25 mg per day. For patients with body weight greater than or equal to 20 kg, initiate dosing at 0.5 mg per day. After a minimum of four days, the dose may be increased to the recommended dose of 0.5 mg per day for patients less than 20 kg and 1.0 mg per day for patients greater than or equal to 20 kg. Maintain this dose for a minimum of 14 days. In patients not achieving sufficient clinical response, the dose may be increased at intervals of 2 weeks or greater, in increments of 0.25 mg per day for patients less than 20 kg, or increments of 0.5 mg per day for patients greater than or equal to 20 kg. The effective dose range is 0.5 mg to 3 mg per day. No dosing data are available for children who weigh less than 15 kg.

  Once sufficient clinical response has been achieved and maintained, consider gradually lowering the dose to achieve the optimal balance of efficacy and safety. The physician who elects to use risperidone tablets for extended periods should periodically re-evaluate the long-term risks and benefits of the drug for the individual patient.

  Patients experiencing persistent somnolence may benefit from a once-daily dose administered at bedtime or administering half the daily dose twice daily, or a reduction of the dose.

  2.4 Dosing in Patients with Severe Renal or Hepatic Impairment

  For patients with severe renal impairment (CLcr < 30 mL/min) or hepatic impairment (10-15 points on Child Pugh System), the initial starting dose is 0.5 mg twice daily. The dose may be increased in increments of 0.5 mg or less, administered twice daily. For doses above 1.5 mg twice daily, increase in intervals of one week or greater [see Use in Specific Populations (8.6 and 8.7)].

  2.5 Dose Adjustments for Specific Drug Interactions

  When risperidone tablets are co-administered with enzyme inducers (e.g., carbamazepine), the dose of risperidone tablets should be increased up to double the patient’s usual dose. It may be necessary to decrease the risperidone tablets dose when enzyme inducers such as carbamazepine are discontinued [see Drug Interactions (7.1)]. Similar effect may be expected with co-administration of risperidone tablets with other enzyme inducers (e.g., phenytoin, rifampin, and phenobarbital).

  When fluoxetine or paroxetine is co-administered with risperidone tablets, the dose of risperidone tablets should be reduced. The risperidone tablets dose should not exceed 8 mg per day in adults when co-administered with these drugs. When initiating therapy, risperidone tablets should be titrated slowly. It may be necessary to increase the risperidone tablets dose when enzyme inhibitors such as fluoxetine or paroxetine are discontinued [see Drug Interactions (7.1)].

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