Magnesium chloride may be taken as a whole tablet -- not crushed -- with a full glass of water, as recommended by writers at Drugs.com. The tablets are designed to slowly dissolve in the body. It shoud be noted that nursing or pregnant women and those with kidney problems may not be able to take magnesium chloride tablets.
Although it is generally well-accepted by the human body, there are some side effects of magnesium chloride that may be experienced, including allergic reactions such as breathing difficulties, swelling of the tongue, face or lips, closing of the throat and hives.
If too much magnesium is taken, then various metabolic, gastrointestinal, cardiovascular and nervous system problems may occur such as the development of hypocalcemia, or low calcium levels. Stomach problems include nausea and diarrhea. Heart troubles include the development of bradyarrhythmias, in which the heart beats at less than 60 beats per minute. Nervous system problems include muscle weakness, among other conditions.
Magnesium chloride may be affected by certain antibiotics including penicillin, tetracycline antibiotics such as tetracycline, demeclocycline and doxycycline, to name a few. If a patient is taking fluoroquinolone antibiotics like ciprofloxacin (brand name Cipro), he should consult with his medical provider before taking magnesium chloride. Medical advice is also recommended for those taking digoxin and nitrofurantoin. A dose adjustment, reduction or other change may be needed in these circumstances.
Magnesium chloride may be made by combining magnesium hydroxide and hydrochloric acid. The chemical may be used in the making of cement for flooring and the production of magnesium metal, among other uses.