| The most frequent adverse reactions reported during octreotide therapy include gastrointestinal disorders, nervous system disorders, hepatobiliary disorders and metabolism and nutritional disorders.The most commonly reported adverse reactions in clinical trials with octreotide administration were diarrhoea, abdominal pain, nausea, flatulence, headache, cholelithiasis, hyperglycaemia and constipation. Other commonly reported adverse reactions were dizziness, localised pain, bilary sludge, thyroid dysfunction (e.g., decreased thyroid stimulating hormone [TSH], decreased Total T4, and decreased Free T4), loose stools, impaired glucose tolerance, vomiting, asthenia and hypoglycaemia.In rare instances, gastrointestinal side-effects may resemble acute intestinal obstruction, with progressive abdominal distension, severe epigastric pain, abdominal tenderness and guarding.Although measured faecal fat excretion may increase, there is no evidence to date that long-term treatment with octreotide has led to nutritional deficiency due to malabsorption. In very rare instances, acute pancreatitis has been reported within the first hours or days of s.c. Sandostatin treatment and resolved on withdrawal of the drug. In addition, cholelithiasis-induced pancreatitis has been reported for patients on long-term s.c. Sandostatin treatment.In both acromegalic and carcinoid syndrome patients ECG changes were observed such as QT prolongation, axis shifts, early repolarisation, low voltage, R/S transition, early R wave progression, and non-specific ST-T wave changes. The relationship of these events to octreotide acetate is not established because many of these patients have underlying cardiac diseases (see section 4.4 Special warnings and precautions for use).The following adverse drug reactions, listed in Table 1, have been accumulated from clinical studies with octreotide:Adverse drug reactions (Table 1) are ranked under heading of frequency, the most frequent first, using the following convention: very common (> 1/10); common (> 1/100, < 1/10); uncommon (> 1/1,000, < 1/100); rare (1/10,000, < 1/1,000) very rare (< 1/10,000), including isolated reports. Within each frequency grouping, adverse reactions are ranked in order of decreasing seriousness. Table 1 Adverse drug reactions reported in clinical trials | Endocrine disorders | | | Common:
| Hypothyroidism, thyroid dysfunction (e.g., decreased TSH, decreased Total T4, and decreased Free T4).
| | Metabolism and nutrition disorders | | | Very common:
Common:
Uncommon:
| Hyperglycaemia.
Hypoglycaemia, impaired glucose tolerance, anorexia.
Dehydration.
| | Cardiac disorders | | | Common:
Uncommon:
| Bradycardia.
Tachycardia.
| | Respiratory disordersCommon:
| Dyspnoea.
| | Gastrointestinal disorders | | | Very common:
| Diarrhoea, abdominal pain, nausea, constipation, flatulence.
| | Common:
| Dyspepsia, vomiting, abdominal bloating, steatorrhoea, loose stools, discolouration of faeces.
| | Nervous system disordersVery common:
Common:
| Headache.
Dizziness.
| | Hepatobiliary disorders | | | Very common:
| Cholelithiasis.
| | Common:
| Cholecystitis, biliary sludge, hyperbilirubinaemia.
| | Skin and subcutaneous tissue disorders | | | Common:
| Pruritus, rash, alopecia.
| | General disorders and administration site | | | Very common:
| Injection site localised pain.
| | InvestigationsCommon:
| Elevated transaminase levels.
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Post-marketing Spontaneously reported adverse reactions presented in Table 2, are reported voluntarily and it is not always possible to reliably establish frequency or a causal relationship to drug exposure.Table 2 Adverse drug reactions derived from spontaneous reports | Immune disorders | Anaphylaxis, allergy/hypersensitivity reactions.
| | Skin and subcutaneous tissue disorders | Urticaria.
| | Hepatobiliary disorders | Acute pancreatitis, acute hepatitis without cholestasis, cholestatic hepatitis, cholestasis, jaundice, cholestatic jaundice.
| | Cardiac disorders | Arrhythmias.
| | Investigations | Increased alkaline phosphatase levels, increased gamma glutamyl transferase levels.
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