OCTREOTIDE ACETATE
OCTREOTIDE ACETATE
Indications and usage 1 INDICATIONS AND USAGE Octreotide acetate for injectable suspension 10 mg, 20 mg, and 30 mg is indicated in patients in whom initial treatment with octreotide acetate injection has been shown to be effective and tolerated.
Octreotide acetate for injectable suspension is a somatostatin analogue indicated for: Treatment in patients who have responded to and tolerated octreotide acetate injection subcutaneous injection for: • Acromegaly ( 1.1 ) • Severe diarrhea/flushing episodes associated with metastatic carcinoid tumors ( 1.2 ) • Profuse watery diarrhea associated with Vasoactive Intestinal Peptide (VIP) secreting tumors ( 1.3 ) 1.1 Acromegaly Long-term maintenance therapy in acromegalic patients who have had an inadequate response to surgery and/or radiotherapy, or for whom surgery and/or radiotherapy, is not an option.
Structured Monograph
Clinical summary
Indications and usage 1 INDICATIONS AND USAGE Octreotide acetate for injectable suspension 10 mg, 20 mg, and 30 mg is indicated in patients in whom initial treatment with octreotide acetate injection has been shown to be effective and tolerated. Octreotide acetate for injectable suspension is a somatostatin analogue indicated for: Treatment in patients who have responded to and tolerated octreotide acetate injection subcutaneous injection for: • Acromegaly ( 1.1 ) • Severe diarrhea/flushing episodes associated with metastatic carcinoid tumors ( 1.2 ) • Profuse watery diarrhea associated with Vasoactive Intestinal Peptide (VIP) secreting tumors ( 1.3 ) 1.1 Acromegaly Long-term maintenance therapy in acromegalic patients who have had an inadequate response to surgery and/or radiotherapy, or for whom surgery and/or radiotherapy, is not an option. The goal of treatment in acromegaly is to reduce GH and IGF-1 levels to normal [see Clinical Studies (14) , Dosage and Administration (2) ] . 1.2 Carcinoid Tumors Long-term treatment of the severe diarrhea and flushing episodes associated with metastatic carcinoid tumors. 1.3 Vasoactive Intestinal Peptide Tumors (VIPomas) Long-term treatment of the profuse watery diarrhea associated with VIP-secreting tumors. 1.4 Important Limitations of Use In patients with carcinoid syndrome and VIPomas, the effect of octreotide acetate injection and octreotide acetate for injectable suspension on tumor size, rate of growth and development of metastases, has not been determined. Dosage and administration 2 DOSAGE AND ADMINISTRATION • Octreotide acetate for injectable suspension should be administered by a trained healthcare provider. It is important to closely follow the mixing instructions included in the packaging. Octreotide acetate for injectable suspension must be administered immediately after mixing. Discard unused portion. • Do not directly inject diluent without preparing suspension. • The recommended needle size for administration of octreotide acetate for injectable suspension is the 1½” 19 gauge safety injection needle (supplied in the drug product kit). For patients with a greater skin to muscle depth, a size 2” 19 gauge needle (not supplied) may be used. • Octreotide acetate for injectable suspension should be administered intramuscularly (IM) in the gluteal region at 4-week intervals. Administration of octreotide acetate for injectable suspension at intervals greater than 4 weeks is not recommended. • Injection sites should be rotated in a systematic manner to avoid irritation. Deltoid injections should be avoided due to significant discomfort at the injection site when given in that area. • Octreotide acetate for injectable suspension should never be administered intravenously or subcutaneously. The following dosage regimens are recommended. Patients Not Currently Receiving Octreotide Acetate Injection Subcutaneously: • Acromegaly: 50 mcg three times daily octreotide acetate injection subcutaneously for 2 weeks followed by octreotide acetate for injectable suspension 20 mg intragluteally every 4 weeks for 3 months ( 2.1 ) • Carcinoid Tumors and VIPomas: Octreotide acetate injection subcutaneously 100 mcg/day to 600 mcg/day in 2 to 4 divided doses for 2 weeks followed by octreotide acetate for injectable suspension 20 mg every 4 weeks for 2 months ( 2.2 ) Patients Currently Receiving Octreotide Acetate Injection Subcutaneously: • Acromegaly: 20 mg every 4 weeks for 3 months ( 2.1 ) • Carcinoid Tumors and VIPomas: 20 mg every 4 weeks for 2 months ( 2.2 ) Renal Impairment, Patients on Dialysis: 10 mg every 4 weeks ( 2.3 ) Hepatic Impairment, Patients With Cirrhosis: 10 mg every 4 weeks ( 2.4 ) 2.1 Acromegaly Patients Not Currently Receiving Octreotide Acetate Patients not currently receiving octreotide acetate should begin therapy with octreotide acetate injection given subcutaneously in an initial dose of 50 mcg three times daily which may be titrated. Most patients require doses of 100 mcg to 200 mcg three times daily for maximum effect but some patients require up to 500 mcg three times daily. Patients should be maintained on octreotide acetate injection subcutaneous for at least 2 weeks to determine tolerance to octreotide acetate. Patients who are considered to be “responders” to the drug, based on GH and IGF-1 levels and who tolerate the drug, can then be switched to octreotide acetate for injectable suspension in the dosage scheme described below (Patients Currently Receiving Octreotide Acetate Injection). Patients Currently Receiving Octreotide Acetate Injection Patients currently receiving octreotide acetate injection can be switched directly to octreotide acetate for injectable suspension in a dose of 20 mg given IM intragluteally at 4-week intervals for 3 months. After 3 months, dosage may be adjusted as follows: • GH ≤ 2.5 ng/mL, IGF-1 normal, and clinical symptoms controlled: maintain octreotide acetate for injectable suspension dosage at 20 mg every 4 wee
Monitoring
- • 5 WARNINGS AND PRECAUTIONS • Cholelithiasis and Complications of Cholelithiasis: Monitor periodically.
- • Discontinue if complications of cholelithiasis are suspected ( 5.1 ) • Glucose Metabolism: Hypoglycemia or hyperglycemia may occur.
- • Glucose monitoring is recommended and anti-diabetic treatment may need adjustment ( 5.2 ) • Thyroid Function: Hypothyroidism may occur.
- • Monitor thyroid levels periodically ( 5.3 ) • Cardiac Function: Bradycardia, arrhythmia, or conduction abnormalities may occur.
Interaction Notes
- • 7 DRUG INTERACTIONS • The following drugs require monitoring and possible dose adjustment when used with octreotide acetate for injectable suspension: cyclosporine, insulin, oral hypoglycemic agents, beta-blockers, and bromocriptine ( 7 ) • Lutetium Lu 177 Dotatate Injection: Discontinue octreotide acetate for injectable suspension at least 4 weeks prior to each lutetium Lu 177 dotatate dose ( 7.6 ) 7.1 Cyclosporine Concomitant administration of octreotide injection with cyclosporine may decrease blood levels of cyclosporine and result in transplant rejection.
- • 7.2 Insulin and Oral Hypoglycemic Drugs Octreotide inhibits the secretion of insulin and glucagon.
- • Therefore, blood glucose levels should be monitored when octreotide acetate for injectable suspension treatment is initiated and when the dose is altered and anti-diabetic treatment should be adjusted accordingly.
- • 7.3 Bromocriptine Concomitant administration of octreotide and bromocriptine increases the availability of bromocriptine.