Residron Drug Interactions

No formal interaction studies have been performed, however no clinically relevant interactions with other medicinal products were found during clinical trials. In the risedronate sodium Phase III osteoporosis studies with daily dosing, acetylsalicylic acid or NSAID use was reported by 33% and 45% of patients respectively. In the Phase III once a week study in postmenopausal women, acetyl salicylic acid or NSAID use was reported by 57% and 40% of patients respectively. Among regular acetyl salicylic acid or NSAID users (3 or more days per week) the incidence of upper gastrointestinal adverse events in risedronate sodium treated patients was similar to that in control patients. If considered appropriate risedronate sodium may be used concomitantly with oestrogen supplementation (for women only).
Concomitant ingestion of medications containing polyvalent cations (e.g. calcium, magnesium, iron and aluminium) will interfere with the absorption of Risedronate.
Risedronate sodium is not systemically metabolized, does not induce cytochrome P450 enzymes, and has low protein binding.