Polystyrenum

Polystyrene; poly(1-phenylethylene); the polymer of styrene (vinylbenzene / phenylethene, monomer C8H8, CID 7501). Polymer CAS 9003-53-6. · Polystyrene, PS; expanded polystyrene (EPS, "Styrofoam"); also dispensed in combination "plastics detox" preparations alongside Bisphenol-A and PVC.

Modern MM

A modern, synthetic-material ("man-made plastic") remedy. The homeopathic picture in the literature derives from a contemporary proving (attributed to Rajan Sankaran, 1995) of an oil-based synthetic material, reported to be predominantly MENTAL; specific mind rubrics could not be confirmed against a primary, citable proving text and are therefore not reproduced. Physical/toxicological action belongs to the styrene monomer (neurological/solvent-type effects). Use is small and largely confined to practitioners working with modern and "kingdom"-method materia medica.

Key symptoms

There is no widely published, verifiable keynote list in the open literature. Secondary references credit a modern proving (attributed to Rajan Sankaran, 1995) of polystyrene as an "oil-/petroleum-derived" synthetic material that yielded an unusually complete and predominantly MENTAL symptom picture (described in the cling-film proving literature as ranking "with the very best in the proving literature to date, with a strong slant towards Mind symptoms"). Specific mind keynotes are not reproduced here because they could not be confirmed against a primary, citable proving source. Toxicologically derived (Law of Similars) pointers from the styrene monomer—not from a proving—include: dullness, drowsiness and "feeling drunk," vertigo and unsteadiness, impaired memory/concentration, headache and fatigue. These are inferential, not proving-derived keynotes.

Worse (aggravation)

Not reliably established. No validated, sourced modality data are available; specific aggravations should not be assumed.

Better (amelioration)

Not reliably established. No validated, sourced modality data are available.

Manohar V Nagaiah

Materia Medica of Modern Homeopathic Medicine · 2026

Polystyrene, PS; expanded polystyrene (EPS, "Styrofoam"); also dispensed in combination "plastics detox" preparations alongside Bisphenol-A and PVC.

Source & Nature

Polystyrenum is the potentised preparation of polystyrene (CAS 9003-53-6; PubChem substance "Benzene, ethenyl-, homopolymer"), a synthetic aromatic-hydrocarbon thermoplastic made by polymerising the monomer styrene (vinylbenzene / phenylethene; C8H8; CAS 100-42-5; PubChem CID 7501). Polystyrene is a colourless, transparent, rigid, hydrophobic, non-biodegradable plastic produced in solid (general-purpose and high-impact) and foamed (expanded, EPS) grades, and is among the most widely used commodity plastics—food containers, disposable cutlery, packaging foam, insulation, and (as latex microspheres) some medical/dental uses.

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Classical texts are in the public domain. Educational reference only — not medical advice.