| Summary of the safety profile The most frequent adverse drug reactions ( 5 % of BYDUREON treatment) were mainly gastrointestinal related (nausea, vomiting, diarrhoea and constipation). The most frequently reported single adverse reaction was nausea which was associated with the initiation of treatment and decreased over time. In addition, injection site reactions (pruritus, nodules, erythema), hypoglycaemia (with a sulphonylurea), and headache occurred. Most adverse reactions associated with BYDUREON were mild to moderate in intensity.Acute pancreatitis and acute renal failure have been reported rarely since exenatide twice daily has been marketed (see section 4.4).Tabulated summary of adverse reactions The frequency of adverse reactions of BYDUREON with an incidence of 1 % are summarised in Table 1 below. The data source comprises two placebo controlled studies (10 and 15 weeks) and 3 trials comparing BYDUREON to either exenatide twice daily (a 30 week study), sitagliptin and pioglitazone (a 26 week study) and insulin glargine (a 26 week study). Background therapies included diet and exercise, metformin, a sulphonylurea, a thiazolidinedione or a combination of oral anti-diabetic agents. The adverse reactions observed from post-marketing and clinical trial experience with exenatide twice daily that were not observed with BYDUREON at an incidence of 1 % are listed in Table 2 below.The reactions are listed below as MedDRA preferred term by system organ class and absolute frequency. Patient frequencies are defined as: very common ( 1/10), common ( 1/100 to < 1/10), uncommon ( 1/1000 to < 1/100), rare ( 1/10000 to < 1/1000) and very rare (< 1/10000).Within each frequency grouping, undesirable effects are presented in order of decreasing seriousness.Table 1: The frequency of adverse reactions of BYDUREON with an incidence of 1 % in clinical trials. n= 592 total, (patients on sulphonylurea n= 135)
Very common | Common | Metabolism and nutrition disorder | Hypoglycaemia (with a sulphonylurea)1 | Decreased appetite 1 | Nervous system disorders | | | Dizziness 1 | | | Headache 1 | Gastrointestinal disorders | Constipation | Abdominal distention | Diarrhoea1 | Abdominal pain 1 | Nausea1 | Dyspepsia 1 | Vomiting1 | Eructation | | | Flatulence 1 | | | Gastroesophageal reflux 1 | General disorders and administration site conditions | Injection site pruritus | Fatigue 1 | | | Injection site erythema | | | Injection site rash | | | Somnolence | 1 Frequency of reactions was the same in the exenatide twice daily treatment group.Table 2: The adverse reactions observed from post-marketing and clinical trial experience with exenatide twice daily that were not observed with BYDUREON at an incidence of 1 % are listed below:Common | Uncommon | Rare | Very rare | Immune system disorders | | | | | Anaphylactic reaction 2 | Metabolism and nutrition disorder | | | | Dehydration, generally associated with nausea, vomiting and/or diarrhoea. 2 | | Nervous system disorders | | | Dysgeusia 2 | | | Gastrointestinal disorders | | | Acute pancreatitis (see section 4.4). 1,3 | | | Skin and subcutaneous tissue disorders | Hyperhidrosis 1 | | Macular or papular rash 2 | | | | | Pruritus, and/ or urticaria 2 | | | | | Angioneurotic oedema 2 | | | | | Alopecia 2 | | Renal and urinary disorders | | | | Altered renal function, including acute renal failure, worsened chronic renal failure, renal impairment, increased serum creatinine 2 (see section 4.4). | | General disorders and administration site conditions | Asthenia 1 | | | | Feeling jittery 1 | | | | Investigations | | | | International normalised ratio increased with concomitant warfarin use, some reports associated with bleeding (see section 4.4). 2 | | 1 Rate based on exenatide twice daily clinical trial data.2 Rate based on exenatide twice daily spontaneous data.3 Events were uncommon in all treatment groups.Description of selected adverse reactions Hypoglycaemia The incidence of hypoglycaemia was increased when BYDUREON was used in combination with a sulphonylurea (15.9 % versus 2.2 %) (see section 4.4). To reduce the risk of hypoglycaemia associated with the use of a sulphonylurea, reduction in the dose of sulphonylurea may be considered (see sections 4.2 and 4.4). BYDUREON was associated with a significantly lower incidence of episodes of hypoglycaemia than insulin glargine in patients also receiving metformin therapy (3 % versus 19 %) and in patients also receiving metformin plus sulphonylurea therapy (20 % versus 42 %). Across all studies most episodes (96.8 % n=32) of hypoglycaemia were minor, and resolved with oral administration of carbohydrate. One patient was reported with major hypoglycaemia since he had a low blood glucose value (2.2 mmol/l) and requested assistance with oral carbohydrate treatment which resolved the event.Nausea The most frequently reported adverse reaction was nausea. In patients treated with BYDUREON, generally 20 % reported at least one episode of nausea compared to 34 % of exenatide twice daily patients. Most episodes of nausea were mild to moderate. With continued therapy, the frequency decreased in most patients who initially experienced nausea. The incidence of withdrawal due to adverse events during the 30-week controlled trial was 6 % for BYDUREON-treated patients, 5 % for exenatide twice daily-treated patients. The most common adverse events leading to withdrawal in either treatment group were nausea and vomiting. Withdrawal due to nausea or vomiting each occurred in < 1 % for BYDUREON-treated patients and 1 % for exenatide twice daily-treated patients. Injection site reactions Injection site reactions were observed more frequently in BYDUREON-treated patients versus comparator treated patients (16 % versus range of 2-7 %) during the 6 month controlled phase of studies. These injection site reactions were generally mild and usually did not lead to withdrawal from studies. Patients may be treated to relieve symptoms, while continuing treatment. Subsequent injections should use a different site of injection each week.Small subcutaneous injection site nodules were observed very frequently in clinical trials, consistent with the known properties of poly (D,L-lactide co-glycolide) polymer microsphere formulations. Most individual nodules were asymptomatic, did not interfere with study participation and resolved over 4 to 8 weeks.Immunogenicity Consistent with the potentially immunogenic properties of protein and peptide pharmaceuticals, patients may develop antibodies to exenatide following treatment with BYDUREON. In most patients who develop antibodies, antibody titres diminish over time. The presence of antibodies (high or low titres) is not predictive of glycaemic control for an individual patient. In clinical studies of BYDUREON, approximately 45 % of patients had low titre antibodies to exenatide at study endpoint. Overall the percentage of antibody positive patients was consistent across clinical trials. Overall, the level of glycaemic control (HbA1c) was comparable to that observed in those without antibody titres. On average in the phase 3 studies, 12 % of the patients had higher titre antibodies. In a proportion of these the glycaemic response to BYDUREON was absent at the end of the controlled period of studies; 2.6 % of patients showed no glucose improvement with higher titre antibodies while 1.6 % showed no improvement while antibody negative.Patients who developed antibodies to exenatide tend to have more injection site reactions (for example: redness of skin and itching), but otherwise similar rates and types of adverse events as those with no antibodies to exenatide. For BYDUREON-treated patients, the incidence of potentially immunogenic injection site reactions (most commonly pruritus with or without erythema) during the 30-week and the two 26-week studies, was 9 %. These reactions were less commonly observed in antibody-negative patients (4 %) compared with antibody-positive patients (13 %), with a greater incidence in those with higher titre antibodies.Examination of antibody-positive specimens revealed no significant cross-reactivity with similar endogenous peptides (glucagon or GLP-1). Rapid weight loss In a 30-week study, approximately 3 % (n=4/148) of BYDUREON-treated patients experienced at least one time period of rapid weight loss (recorded body weight loss between two consecutive study visits of greater than 1.5 kg/week). | |