The main undesirable phenomena (AEs) observed with the use of octreotide were disorders of the gastrointestinal tract and nervous system, violations of the liver and bile ducts, as well as disorders of metabolism and nutrition.
In clinical studies, diarrhea, abdominal pain, nausea, bloating, headache, cholelithiasis, hyperglycemia and constipation were most frequently observed with the use of the drug. Also, dizziness, pain of different localization, violation of colloidal bile stability (formation of cholesterol microcrystals), thyroid dysfunction (decrease in thyroid-stimulating hormone concentration, total and free thyroxin), soft stool consistency, decreased glucose tolerance, vomiting, asthenia and hypoglycemia were often noted.
When applying the drug in rare cases, there may be phenomena reminiscent of acute intestinal obstruction: progressive bloating, severe pain in the epigastric region, abdominal wall tension and muscular dysfunction.
Despite the fact that excretion of fats with feces may increase, there is no evidence that prolonged treatment with octreotide can lead to the development of nutritional deficiencies due to malabsorption (malabsorption). The likelihood of such side effects can be reduced by administering the drug between meals or at bedtime.
There were reported very rare cases of acute pancreatitis in the first hours or days after octreotide application (preparation Sandostatin®), which was resolved on its own after the drug was withdrawn. In addition, with prolonged use of the drug Sandostatin®, there were cases of development of pancreatitis caused by cholelithiasis.
According to the ECG data, prolongation of the QT interval, deviation of the electric axis of the heart, early repolarization, low-ECG type, displacement of the transition zone, early tooth P and nonspecific changes in the ST segment and the T wave were observed in patients with acromegaly and carcinoid syndrome, This category of patients had concomitant heart disease, a causal relationship between the use of octreotide and the development of these undesirable phenomena has not been established.
AEs are grouped according to the classification of organs and systems of organs of MedDRA, listed in order of decreasing frequency of occurrence.
The following criteria were used to determine the incidence of adverse events identified in clinical trials: very often (≥ 1/10); often (≥1 / 100, <1/10); infrequently (≥1 / 1000, <1/100); rarely (≥1 / 10000, <1/1000); very rarely (<1/10000),including individual messages.
Disorders from the gastrointestinal tract: very often - diarrhea, abdominal pain, nausea, constipation, bloating; often - indigestion, vomiting, feeling of filling / heaviness in the abdomen, steatorrhea, soft stool consistency, discoloration of the stool; rarely soreness in palpation of the abdomen.
Disturbances from the nervous system: very often - headache; often - dizziness.
Disorders from the endocrine system: often - hypothyroidism / thyroid dysfunction (decrease in thyroid-stimulating hormone, total and free thyroxine).
Disorders from the metabolism and nutrition: very often hyperglycemia: often - hypoglycemia, impaired glucose tolerance, anorexia; infrequently - dehydration.
Disturbances from the liver and bile ducts: very often - cholelithiasis; often - cholecystitis, violation of the colloidal stability of bile (formation of microcrystals of cholesterol), hyperbilirubinemia.
Disturbances from the skin and subcutaneous tissues: often - itching, rashes, alopecia.
Disturbances from the respiratory system, chest and mediastinal organs: often - shortness of breath.
Heart Disease: often bradycardia; infrequently - a tachycardia.
General disorders and disorders at the site of administration: very often - reactions at the site of injection: tingling, burning, flushing, pain and swelling at the injection site (usually lasting no more than 15 minutes after the injection and less pronounced with a suspension of the preparation at room temperature or with a smaller volume of suspension with a larger concentration); often - asthenia.
Laboratory and instrumental data: often - an increase in the activity of "liver" transaminases.
Since data on undesirable phenomena in the postmarketing period were obtained on the basis of voluntary spontaneous messages from a population of unknown numbers, it is impossible to estimate the frequency of their occurrence (the frequency is unknown).
Undesirable phenomena are classified according to the systems of organs, within each system of organs, undesirable phenomena are arranged in order of decreasing importance.
Immune system disorders: anaphylactic reactions, allergic reactions / hypersensitivity reactions.
Disturbances from the skin and subcutaneous tissues: hives.
Disturbances from the liver and bile ducts: acute pancreatitis, acute hepatitis without the phenomena of cholestasis, cholestatic hepatitis, cholestasis, jaundice, cholestatic jaundice.
Laboratory and instrumental data: an increase in the activity of alkaline phosphatase and gamma-glutamyltransferase.
Heart Disease: arrhythmia.