Magnesium is generally safe, but its timing with certain medications matters more than most people realize — taken too close together, it can reduce how well some antibiotics, thyroid medication, or bone-strengthening drugs work, while other medications can quietly deplete your magnesium over time.

Yes — that statement is substantially correct, with an important qualification: the interaction depends on the specific medication and magnesium product.

• Certain antibiotics: magnesium can bind some antibiotics in the gut and reduce absorption. This is particularly relevant to tetracyclines (such as doxycycline) and fluoroquinolones (such as ciprofloxacin). They generally need to be separated from magnesium.

• Levothyroxine: magnesium-containing products can interfere with absorption. Taking levothyroxine on an empty stomach and separating it from magnesium is commonly recommended.

• Bisphosphonates: magnesium can reduce absorption of oral bone-strengthening medicines such as alendronate. These medications have specific timing instructions.

• Some medicines can lower magnesium: long-term use of proton-pump inhibitors (such as omeprazole) and certain diuretics can contribute to low magnesium in some people.

One important point: don’t automatically stop or change a prescribed medication because you’re taking magnesium. The appropriate separation interval varies by drug.

If you give me the names and doses of your medications plus your magnesium supplement (e.g., magnesium glycinate/citrate and its dose), I can make you a simple daily schedule showing which ones should be separated.