Which drugs can interact with calcium?

The correct choice highlights the interaction between laxatives containing magnesium and calcium, as well as phenytoin, which is an anticonvulsant medication. Certain laxatives, especially those that contain magnesium, can affect calcium absorption and status in the body. Phenytoin can bind to calcium, potentially interfering with calcium metabolism and leading to bone density issues, particularly in older adults.

Laxatives may promote increased bowel movements and can alter the gastrointestinal flora and environment, affecting the absorption of various nutrients, including calcium. Phenytoin’s effect on calcium metabolism can lead to complications such as osteomalacia or osteoporosis, especially in populations that are already at risk, such as older adults.

The other options involve drugs that might have interactions with calcium as well, but the relationships are less direct or significant when considering the primary interactions. While aluminum hydroxide can bind to dietary phosphate and disrupt calcium-phosphate interactions, its main use is not as widely discussed in the context of calcium. Mineral oil primarily serves as a laxative and can decrease absorption of fat-soluble vitamins, but it does not have a strong interaction with calcium compared to the two listed in the correct choice. Warfarin and cholestyramine have different mechanisms of action and primarily