The following symptoms and complaints may indicate hypomagnesemia (magnesium deficiency):
- Neuromuscular (nerve-muscle-related) symptoms.
- Hyperreflexia* (increased reflex readiness).
- Muscle fasciculations (muscle twitching) or muscle cramps/calf cramps.
- Tetany (neuromuscular hyperexcitability, which can lead mainly to painful muscle spasms) [esp. in the simultaneous occurrence of hypocalcemia (calcium deficiency) and / or hypokalemia (potassium deficiency)].
- Cardiovascular (cardiovascular-related) symptoms:
- ECG changes
- Decrease in ST segment
- Flattening of the T-wave
- Possible QT prolongation
- Cardiac arrhythmias (e.g., arrhythmias* , extrasystoles/extra heartbeats; tachycardia (heartbeat too fast: > 100 beats per minute).
- ECG changes
- Gastrointestinal (gastrointestinal-related) symptoms.
- Constipation (constipation) also alternating with diarrhea (diarrhea).
- Nervous system and psyche
- Apathy* (apathy).
- Ataxia* (disturbance of the coordination of movement).
- Inner restlessness
- Lethargy
- Paresthesias* (“ant tingling”).
- Rapid fatigability
- Irritability*
- Feeling of weakness*
- Dizziness*
- Tremor (shaking)*
* Clinical signs that usually appear only when the magnesium plasma concentration is < 0, 5 mmol/l.
Note: Some of the above symptoms may also indicate hypocalcemia (calcium deficiency).
