Reporting of suspected adverse reactions

Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the national reporting system (see details below).

United Kingdom:

www.mhra.gov.uk/yellowcard

Ireland:

Pharmacovigilance Section

Irish Medicines Board

Kevin O'Malley House

Earlsfort Centre

Earlsfort Terrace

IRL - Dublin 2

Tel: +353 1 6764971

Fax: +353 1 6762517

Website: www.imb.ie

e-mail: imbpharmacovigilance@imb.ie.
4.9 Overdose
 BindRen has been given to dialysis patients in doses up to 15 g/day for up to one year continuously with no cases of overdose. The potential risk of overdosing could include adverse reactions or a worsening of adverse reactions mentioned in section 4.8.

There are no known antidotes to BindRen.

5. Pharmacological properties
 
5.1 Pharmacodynamic properties
 Pharmacotherapeutic group: not yet assigned. ATC code: not yet assigned

BindRen contains colestilan. Colestilan is a non-absorbed, non-calcium, non-metallic phosphate-binding polymer. The binding sites become partially protonated in the stomach and interact through ionic and hydrogen bonding with both dietary phosphate anions and bile acids in the duodenum. By binding phosphate from food in the digestive tract, colestilan lowers the serum phosphorus concentration. Colestilan also binds bile acids, thereby lowering the serum LDL-cholesterol concentration. Changes in the bile acid pool in the gastrointestinal tract have also been observed to lower serum glucose. Colestilan may also bind uric acid in the gastrointestinal tract.

Three Phase III studies and two long term follow-up studies have been performed in patients with CKD Stage 5 on dialysis, in order to investigate efficacy and safety in this population.

Serum phosphorus

Fixed-dose study:

In a double-blind, 12-week fixed-dose study with five colestilan groups (3, 6, 9, 12 and 15 g/day) and placebo, colestilan at 6 g/day and above demonstrated a dose-dependent reduction in serum phosphorus level. The least squares mean reduction from baseline to week 12 as compared to placebo was 0.16, 0.21, 0.19 and 0.37 mmol/L at 6, 9, 12 and 15 g/day respectively.

Flexible-dose studies:

Two similar 12-week, open-label, flexible-dose studies followed by a 4-week double-blind withdrawal period (comparison to placebo) were performed. In the first study, the mean serum phosphorus level was 2.33 mmol/L at baseline and 1.96 mmol/L (mean reduction by 0.36 mmol/L) at week 12 on a colestilan mean daily dose of 11.5 g. Similarly in the second study, the mean serum phosphorus level was 2.44 mmol/L at baseline and 1.94 mmol/L at week 12 (mean reduction by 0.50 mmol/L) on a colestilan mean daily dose of 13.1 g. The rate of responders (either a reduction in serum phosphorus ≤ 1.78 mmol/L and/or a reduction from baseline ≥ 0.3 mmol/L) was 50.4 % and 43.8% in the two studies, respectively (placebo 30.8% and 26.3%, respectively).

Long-term studies:

Two long-term, open-label, flexible-dose studies demonstrated that serum phosphorus reduction was maintained for up to one year. After one year, the mean serum phosphorus level was 1.89 mmol/L with a signific