Drug Information
Common brand names:
Fosamax Plus D
Summary of Interactions with Vitamins, Herbs, & Foods
Types of interactions:
Beneficial
Adverse
Check
Replenish Depleted Nutrients
Reduces Effectiveness
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Iron
Taking risedronate at the same time as iron, zinc, or magnesium may reduce the amount of drug absorbed. Therefore, people taking risedronate who wish to supplement with these minerals should take them an hour before or two hours after the drug.
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Zinc
Taking risedronate at the same time as iron, zinc, or magnesium may reduce the amount of drug absorbed. Therefore, people taking risedronate who wish to supplement with these minerals should take them an hour before or two hours after the drug.
Potential Negative Interaction
Explanation Required
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Calcium
Calcium supplements may interfere with alendronate absorption. However, one researcher suggested that addition of large amounts of supplemental calcium to alendronate therapy in patients with bone metastases (with evidence of osteomalacia) related to prostate cancer might improve the clinical outcome. Moreover, both calcium and alendronate are commonly used in the treatment of osteoporosis in the same people. To prevent potential interactions, alendronate should be taken two hours before or after calcium supplements.
The interaction is supported by preliminary, weak, fragmentary, and/or contradictory scientific evidence.
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Magnesium
Absorption of tiludronate, a drug related to alendronate, is reduced when taken with magnesium and/or aluminum-containing antacids. This interaction has not yet been reported with alendronate. Until more is known, alendronate should be taken two hours before or after magnesium and/or aluminum-containing antacids.
The interaction is supported by preliminary, weak, fragmentary, and/or contradictory scientific evidence.
The Drug-Nutrient Interactions table may not include every possible interaction. Taking medicines with meals, on an empty stomach, or with alcohol may influence their effects. For details, refer to the manufacturers’ package information as these are not covered in this table. If you take medications, always discuss the potential risks and benefits of adding a new supplement with your doctor or pharmacist.
