Rogaine foam propylene glycol free inactive ingredients?

Rogaine® 5 % Minoxidil Foam – Propylene Glycol–Free (PG‑Free)

The propylene‑glycol‑free version of Rogaine foam is formulated to reduce skin irritation while still delivering the active drug (minoxidil). Its inactive ingredients (i.e., everything other than the 5 % minoxidil) are:

| # | Inactive Ingredient | Role in the Foam |
|---|---------------------|------------------|
| 1 | Water (Aqua) | Solvent that hydrates the skin and helps distribute the active ingredient. |
| 2 | Isopropyl Alcohol | Solvent and mild antiseptic; replaces propylene glycol as the primary solvent to keep the foam stable and reduce irritation. |
| 3 | Glycerin | Humectant that retains moisture and improves skin tolerance. |
| 4 | Propane | Propellant – one of the two gases that create the aerosol foam when the canister is shaken. |
| 5 | Isobutane | Propellant – works with propane to generate the foam texture and assist in delivery. |
| 6 | Sodium Hydroxide (≤ 0.02 %) | pH adjuster – keeps the formulation at a slightly alkaline pH that is comfortable for topical use. |

Key point: The product contains no propylene glycol (PG). The isopropyl alcohol and glycerin pair serves the role that PG would normally play, ensuring that the foam is still effective but more skin‑friendly for those who are sensitive to PG.

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Quick Reference

- Active ingredient: 5 % minoxidil
- Inactive ingredients (PG‑free): water, isopropyl alcohol, glycerin, propane, isobutane, sodium hydroxide (small amount)
- Propellants: propane and isobutane
- Why PG‑free? Helps reduce irritation, especially for users with sensitive scalps or a history of dermatitis.

If you have a specific concern (e.g., a known allergy to isopropyl alcohol or glycerin), it’s a good idea to check the full ingredient list on the product label or the manufacturer’s website, and consider speaking with a dermatologist or pharmacist.