Magnesium Phosphoricum (Mag. Phos.), one of Dr. Wilhelm Schussler’s twelve tissue salts, is known as the “homeopathic pain reliever” and “anti-spasmodic salt.”
It plays a vital role in the nervous system and muscles, helping relieve cramps, spasms, neuralgia, and colicky pains.
Mag. Phos. is the best remedy for nerve-related pain and muscle contractions, often called “homeopathic aspirin.”
It is frequently used for menstrual cramps, colic, facial neuralgia, migraines, and muscle spasms.

Table of Contents
ToggleScientific Classification & Origin
- Scientific Name: Magnesium Phosphate
- Chemical Formula: MgHPO₄
- Source: Naturally found in bones, nerves, muscles, and brain tissue.
- Location in the Body: Present in nerve fibers, muscle tissues, and the brain.
Key Functions of Magnesium Phosphoricum
✔ Relaxes muscles and nerves – Helps with spasms, cramps, and stiffness.
✔ Acts as a natural pain reliever – Used for neuralgic and colicky pains.
✔ Controls involuntary muscle contractions – Useful for twitching, hiccups, and leg cramps.
✔ Regulates nerve impulses – Calms anxiety and nerve-related disorders.
✔ Supports digestion – Helps with gas, bloating, and spasmodic colic.
✔ Eases menstrual pain – Beneficial for painful periods with cramping.
Constitution & Temperament
Physical Constitution
- Suited to individuals who are lean, thin, or nervous.
- Sensitive to cold, touch, and noise.
- Suffer from frequent cramps, muscle tension, and neuralgia.
WHAT IS CONSTITUTION IN HOMOEOPATHY?
Temperament
- Irritable, anxious, or easily excited.
- Restless and fidgety.
- Hypersensitive to external stimuli.
WHAT ARE TEMPERAMENTS IN HOMOEOPATHY?
Key Symptoms & Indications
1. Nerve & Neuralgic Pains
✔ Sciatica & Nerve Pain – Shooting, darting pains along the sciatic nerve, worse from cold exposure.
✔ Trigeminal Neuralgia – Sharp facial pain, worse on the right side and from touch.
✔ Migraines & Headaches – Neuralgic headaches with lightning-like pain, better from warmth.
▶ Comparison with Other Remedies:
- Hypericum – Best for nerve injuries and sharp shooting pains.
- Spigelia – More suited for left-sided facial neuralgia.
- Belladonna – Works on throbbing, congestive headaches.
2. Muscle Cramps & Spasms
✔ Leg Cramps & Restless Legs – Painful cramps, often at night.
✔ Writer’s Cramp & Hand Spasms – Occurs in those who overuse their hands.
✔ Hiccups & Spasmodic Cough – Involuntary contractions of the diaphragm.
✔ Eyelid Twitching – Repeated involuntary eye muscle spasms.
▶ Comparison with Other Remedies:
- Cuprum Met. – Works on violent cramps with jerking movements.
- Zincum Met. – Best for restless legs and nervous fidgeting.
3. Colic & Abdominal Spasms
✔ Gastric Colic – Severe cramps, relieved by warmth and pressure.
✔ Menstrual Cramps – Sharp, spasmodic pains in the uterus, better by heat.
✔ Infantile Colic – Useful in babies with gas and severe tummy pain.
▶ Comparison with Other Remedies:
- Colocynthis – Best for colic that improves by bending double.
- Chamomilla – Suited for colic in irritable babies.
- Dioscorea – Works on colic better by stretching backwards.
4. Menstrual Disorders & Uterine Cramps
✔ Painful Menses (Dysmenorrhea) – Severe spasmodic cramps, better by warm applications.
✔ Premenstrual Syndrome (PMS) – Nerve tension, irritability, and abdominal cramps before periods.
✔ Ovarian Neuralgia – Shooting pains in the ovaries, worse before menstruation.
▶ Comparison with Other Remedies:
- Cimicifuga – Works on severe cramps radiating down the thighs.
- Belladonna – For sudden, intense menstrual pains.
- Pulsatilla – Best for irregular, changeable menstrual cycles.
5. Anxiety, Stress & Sleep Disorders
✔ Nervous Exhaustion – Helps individuals who feel mentally and physically drained.
✔ Insomnia from Muscle Tension – Useful for stress-related sleep disturbances.
✔ Anxiety with Spasms – Helps people who get cramps or nervous tics due to stress.
▶ Comparison with Other Remedies
- Kali Phos. – Best for mental exhaustion and depression.
- Gelsemium – Works on anxiety with trembling.
- Ignatia – Useful for grief-related nervousness.
Modalities (What Makes Symptoms Better or Worse?)
✅ Better By
- Warmth (Hot applications, hot drinks, warm bed)
- Gentle pressure and massage
- Bending forward (for colic and abdominal cramps)
❌ Worse By
- Cold air or cold drinks
- Touch (even light touch can worsen neuralgia)
- Night (cramps and colic are often worse at night)
WHAT ARE MODALITIES IN HOMOEOPATHY?
Relationship with Other Remedies
▶ Complementary Remedies (Enhance Its Action)
- Kali Phos. – Works together with Mag. Phos. to relax nerves and muscles.
- Chamomilla – Helps in colic and nerve pain in irritable individuals.
- Calc. Phos. – Supports growth and prevents muscle cramps in children.
▶ Remedies to Compare
- Colocynthis – More suited for colic that is relieved by bending double.
- Cuprum Met. – Works on severe cramps with jerking movements.
- Belladonna – Useful for sudden, violent spasms.
▶ Antidotes (Neutralizes Effects If Overused)
- Chamomilla and Nux Vomica can balance the effects of Mag. Phos. if symptoms worsen.
Dosage & Potency Selection
✅ Low Potencies (3X, 6X, 12X) – Best for cramps, neuralgia, and mild muscle tension.
✅ Medium Potencies (30C, 200C) – Used for chronic neuralgia, anxiety, and severe spasms.
✅ Higher Potencies (1M and above) – Occasionally used in constitutional cases of nerve weakness.
💊 Schussler’s Tissue Salt Potency
- Most commonly used in 6X or 12X for daily relief of cramps and spasms.
- Taken 3–4 times daily, especially before bedtime if cramps disturb sleep.
Final Summary of Magnesium Phosphoricum
✔ Primary Action: Anti-spasmodic, pain reliever, muscle relaxant.
✔ Best for: Neuralgia, muscle cramps, colic, menstrual pain, anxiety.
✔ Key Symptom: Sharp, spasmodic pain relieved by warmth.
✔ Worse by: Cold, touch, night.
✔ Better by: Warmth, pressure, bending forward.
✔ Main Complementary Remedies: Kali Phos., Chamomilla, Calc. Phos.
Closing Thoughts
Mag. Phos. is an essential remedy for muscle and nerve-related pain, making it a valuable medicine for cramps, neuralgia, colic, and menstrual pain relief.
Whether you’re a doctor, student, or patient, understanding this remedy helps in treating various painful conditions effectively.
The 12 Essential Cell Salts
- Calcarea Fluorica (Calc. Fluor.) – Strengthens bones, teeth, and skin elasticity
- Calcarea Phosphorica (Calc. Phos.) – Essential for bone growth and cell regeneration
- Calcarea Sulphurica (Calc. Sulph.) – Supports skin healing and detoxification
- Ferrum Phosphoricum (Ferr. Phos.) – First aid for inflammation and oxygen transport
- Kali Muriaticum (Kali Mur.) – Supports mucous membranes and detox processes
- Kali Phosphoricum (Kali Phos.) – The nerve tonic, combats stress and fatigue
- Kali Sulphuricum (Kali Sulph.) – Supports respiratory health and skin conditions
- Magnesia Phosphorica (Mag. Phos.) – Relieves muscle cramps and nerve pain
- Natrum Muriaticum (Nat. Mur.) – Regulates water balance and emotional well-being
- Natrum Phosphoricum (Nat. Phos.) – Balances acidity and aids digestion
- Natrum Sulphuricum (Nat. Sulph.) – Liver detox and bile production
- Silicea (Sil.) – Strengthens connective tissues, skin, hair, and nails.