Calcarea sulphurica 6X is a biochemic tissue salt of calcium sulphate (gypsum). Homeopaths and Schuessler pharmacists give it when thick yellow pus lingers after a boil, pimple or discharge has already opened. It is not a plant, not plaster of Paris you swallow, and not an antibiotic. Spreading redness, fever or a facial boil still need a doctor.

This article is for people searching calcarea sulphurica 6x uses or Calc sulph 30. It is not a protocol for abscess surgery or for stopping prescribed antibiotics.
| Item | Detail |
|---|---|
| Chemical | Calcium sulphate (CaSO₄) — gypsum / plaster of Paris mineral |
| Also written | Calc sulph, Calcarea sulphurica 6X, 6X HPUS, Calc-s. |
| Schuessler number | Tissue salt No. 3 |
| How it is made | Trituration with lactose; insoluble mineral, so no true Q |
| 6X | Trace mineral + a lot of milk sugar |
| 30C / 200C | No measurable gypsum if made properly |
| Main classical use | Yellow, lumpy pus that persists after the abscess has a vent |
| OTC label claim | Temporary relief of boils, pimples, yellow cold discharge — not FDA evaluated |
| Safety in one line | 6X is not cefalexin; delay of a hot abscess is the harm |
The old WeClinic line that it is “made from the Calcarea sulphurica plant” is false. There is no such plant. Magnesium, iron and zinc on that page were copied from a mineral-supplement template; they are not the pharmacopoeial starting material.
Because gypsum is insoluble, pharmacies triturate it with lactose. A 6X tablet is mostly milk sugar. A bottle labelled “Calcarea sulph Q” is mislabelled in the same way as Graphites Q. Use a numbered potency. See biochemic tissue salts and mother tincture.
US labels list Calc sulph 6X for colds with yellow discharge, sore throat, pimples — and print that homeopathy lacks accepted medical evidence.
There is no reliable trial that Calcarea sulphurica 6X or 30C treats acne, abscess, sinusitis or a discharging ear.
Acne care that has guidelines is topical retinoid, benzoyl peroxide, sometimes antibiotics or isotretinoin. A boil that is spreading is incision and antibiotics territory, not a tissue salt.
Boericke: pus with a vent — the later stage of suppuration, yellow and lumpy, slow to heal once opened. Contrast Hepar sulph: Hepar is before it opens, exquisitely sharp, chilly, wants a wrap. Calc sulph is after, still pouring yellow.
Acne with yellow heads that crust and linger. Colds with thick yellow post-nasal gunk. Wounds that keep a yellow wick. Ears and lids in the same yellow-discharge lists.
It is not a calcium supplement for bones, a joint-rebuild salt, or a gonorrhoea drug because 19th-century texts mentioned pus.
Modalities often listed: dislikes warm wraps, prefers open air, may crave sour / unripe fruit; worse for milk and getting wet. Use them as picture-match, not as diet science.
| Form | What is in it | Typical use | Repeat |
|---|---|---|---|
| 3X / 6X | Trace CaSO₄ + lactose | Tissue-salt / local yellow pus | Short; review in days |
| 6C / 30C | Little to no mineral | Same picture, “higher” | Stop on improvement |
| 200C | Empty | Not a daily acne course | Homeopath |
| Q | Does not exist properly | — | Do not buy |
Biochemic custom is often several 6X tablets through the day. That is a lactose load, not an antibiotic course. See potency.
From 12C up: no gypsum poisoning. 6X: bloating from lactose; delay while cellulitis spreads. Calc sulph 30 does not interact with blood thinners as calcium sulphate — there is almost none in a 30C.
| Remedy | Stage of pus | Choose it when |
|---|---|---|
| Hepar sulph | About to burst; stitch-pain; chilly | Super-sensitive, wants heat |
| Calc sulph | Already open; thick yellow lingers | Slow-healing yellow wick |
| Silicea | Foreign body, fistula, chilly sweat | Splinters, slow repair, sweaty |
| Graphites | Sticky honey, not frank pus | Folds, cracks, large stools |
| Kali sulph | Yellow, watery, changing | More Kali-sulph “evening heat” |
WeClinic is in Panki, Kanpur. Hours are 10 AM–9 PM, closed Monday. Packages run about Rs 1,600–5,000. Call +91 7905136461 after hot infections are examined.
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