magnesium dose/ overdose/ drug interactions

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You can overdose on mag/citrate

Symptoms of an magnesium citrate overdose include nausea, vomiting, flushing, low blood pressure, a slow heartbeat, drowsiness, coma, and death.

http://health.yahoo.com/publichealth-resources/magnesium-citrate/healthwise--d01008a1.html

Magnesium dose

Pediatric

Do not give magnesium supplements to a child without a doctor’s supervision.

Infants and children up to 3 years of age: 40 - 80 mg daily

Children 4 - 6 years of age: 120 mg daily

Children 7 - 10 years of age: 170 mg daily

Adult

Adolescent and adult males: 270 - 400 mg daily

Adolescent and adult females: 280 - 300 mg daily

Pregnant females: 320 mg daily

Breastfeeding females: 340 - 335 mg daily

http://www.umm.edu/altmed/articles/magnesium-000313.htm

Precautions:

Because of the potential for side effects and interactions with medications, dietary supplements should be taken only under the supervision of a knowledgeable health care provider.

People with heart or kidney disease should not take magnesium supplements except under their doctor's supervision.

It is very rare to overdose on magnesium from food. However, people who ingest large amounts of milk of magnesia (as a laxative or antacid) or epsom salts (as a laxative or tonic) may overdose, especially if they have kidney problems. Too much magnesium can cause serious health problems, including nausea, vomiting, severely lowered blood pressure, slowed heart rate, deficiencies of other minerals, confusion, coma, and even death.

More common side effects from magnesium include upset stomach and diarrhea.

Magnesium competes with calcium for absorption and can cause a calcium deficiency if calcium levels are already low. Some medications may lower magnesium levels in the body. These include chemotherapy drugs, diuretics, digoxin (Lanoxin), hormonal supplementation, steroids, and certain antibiotics.

Possible Interactions:

If you are currently being treated with any of the following medications, you should not use magnesium without first talking to your health care provider.

Antibiotics -- Taking magnesium supplements may reduce the absorption of quinolone antibiotics, tetracycline antibiotics, and nitrofurantoin (Macrodandin). Magnesium should be taken 1 hour before or 2 hours after taking these medications. Quinolone and tetracycline antibiotics include:

Ciprofloxacin (Cipro)

Moxifloxacin (Avelox)

Tetracycline (Sumycin)

Doxycycline (Vibramycin)

Minocycline (Minocin)