cough soap

The primary listed ingredients across options are sodium carbonate and sodium chloride (common salts).

Product descriptions list a proprietary aromatic blend that commonly includes eucalyptus, menthol, camphor and other essential oils.

Most listings recommend adult use only, advise keeping the products out of reach of children, and recommend consulting a doctor if pregnant or nursing.

Place a shower tablet on the shower floor just before stepping in, run warm water while you shower, and allow the tablet to fully dissolve during the shower.

Sprinkle about 2 handfuls (roughly 1/3 cup) of bath crystals under warm running water, fill the tub at least halfway, let the salt dissolve, and soak for up to 20 minutes.

Descriptions repeatedly state the vapors are non‑medicated and explicitly say they are not intended to treat cold or flu symptoms.

Reviewer summaries report that most users found the vapors effective for decongestion—clearing sinuses, opening airways, and often providing quick relief after a steamy shower.