Minoxidil foam or lotion: what's the difference?

Minoxidil is used for hereditary hair loss, also known as androgenetic alopecia. It is available in various forms, including lotion and foam. Both forms contain the same active ingredient: minoxidil.

However, the difference in formulation can be significant. Not so much because one form is "better" for everyone, but because ease of use, scalp sensation, and skin sensitivity vary from person to person.

In this article, we explain the difference between minoxidil foam and minoxidil lotion, when foam can be pleasant, when lotion can be convenient, and what to look out for during use.

What do foam and solution have in common?

Both the foam and the solution contain minoxidil as the active ingredient. Minoxidil has been used for hereditary hair loss for years and is the only over-the-counter treatment for hair loss with medical scientific evidence.

Minoxidil can influence the hair growth cycle.¹ It primarily works on hair follicles that are still active. The goal is usually not to create completely new hair follicles, but to preserve existing, thinning hairs, encourage thicker regrowth, and where possible, stronger and longer growth.

For both forms, consistent use is important. Results usually do not appear within a few days or weeks. It takes 3 to 6 months before you can properly assess what the treatment does for you.

What is minoxidil lotion?

Minoxidil lotion is the liquid form of minoxidil. The liquid is applied to the scalp, usually with an applicator or sprayer.

An advantage of solution is that it can be applied precisely. This can be useful for clear areas where hair is thinning, for example, along the parting or on a specific spot on the scalp.

A point of attention is that some minoxidil solutions contain propylene glycol. Propylene glycol is an excipient that helps minoxidil dissolve well and be applied to the skin. For most people, this does not cause problems. However, in some users, propylene glycol can contribute to itching, redness, dryness, flaking, or a burning sensation.

What is minoxidil foam?

Minoxidil foam contains the same active ingredient, but in a foam formulation.

An important difference is that minoxidil foam does not contain propylene glycol. Therefore, foam can be more pleasant for some people with a sensitive scalp than lotion.

Foam often absorbs quickly and is experienced as cosmetically pleasant by many users. It feels less liquid and spreads less easily than solution. This can be useful for daily use.

It is still important that foam also reaches the scalp as much as possible, and not just the hair. Minoxidil must reach the skin around the hair follicles.

Is foam better than solution?

Not necessarily. For many people, both foam and solution can work well. The choice mainly depends on what suits your scalp, hair, and daily routine.

Foam can be a good choice when:

• you have a sensitive scalp,
• lotion causes itching, redness, dryness, or flaking,
• you prefer foam over a liquid product,
• you prefer to avoid propylene glycol,
• you like the product to dry quickly.

Solution can be a good choice when:

• you want to apply the product very precisely,
• it is important that it is cheaper,
• you don't think your scalp will suffer from irritation,
• you prefer a liquid application.

Propylene glycol: why is it relevant?

Propylene glycol is an excipient often used in liquid topical medications. In minoxidil solution, it helps to dissolve the active ingredient well and apply it to the skin.

For most people, propylene glycol is not a problem. However, in some users, it can cause irritation or contact eczema. In dermatological research into contact dermatitis from topical minoxidil solutions, propylene glycol was regularly identified as a cause of skin reactions, sometimes more often than minoxidil itself.^5,6

This does not mean that everyone should avoid solution. It does mean that propylene glycol is a point of concern for people with a sensitive scalp or existing complaints such as itching, redness, dryness, or flaking.

Do you want to know more about the influence of propylene glycol on the scalp? Read our detailed article about propylene glycol and hair loss.

Can I switch from lotion to foam?

Yes, you can. Minoxidil solution and minoxidil foam contain the same active ingredient and are both used for hereditary hair loss.

If you are using solution and notice that your scalp reacts sensitively, foam without propylene glycol can be a logical option. Please note that the instructions for use differ for both products.

Do not use solution and foam on top of each other in the same spot. If you use both forms simultaneously, choose which one you want to use per zone or per application. This prevents you from unknowingly using too much product.

In case of persistent irritation, redness, pain, crusts, inflammation, or severe itching, it is advisable to contact a doctor, dermatologist, or pharmacist.

What should you pay attention to when using?

For both forms:

• apply minoxidil to a dry scalp;
• do not use more than the recommended amount;
• apply it as much as possible to the scalp instead of in the hair;
• let the product dry thoroughly;
• wash hands after use;
• do not combine too many new shampoos, serums, scrubs, or lotions at once initially;

When to contact?^7,8

Contact your doctor, dermatologist, or our pharmacist if you experience:

persistent redness, severe itching, burning, pain, crusts, inflammation, severe flaking, dizziness, heart palpitations, or other complaints that you do not trust.

Do not stop without consultation if in doubt, but ask for advice. Sometimes a small adjustment in use or formulation can already make a difference.

Frequently asked questions

Does minoxidil foam work as well as lotion?

Minoxidil foam and solution contain the same active ingredient. There is no direct comparative research, but separate studies show that you can expect similar effectiveness from both products in the same concentration (5%).

Why do some people choose minoxidil foam?

Foam does not contain propylene glycol. Therefore, it can be more pleasant for people with a sensitive scalp. Foam is also less liquid and is often perceived as cosmetically more pleasant.

Why do some people choose minoxidil lotion?

Solution is liquid and can be applied precisely to specific areas. Some users find this pleasant, for example, when they have thinning hair along a clear parting or in a defined area. Another reason people choose solution is because it is cheaper.

Can minoxidil solution cause itching?

Yes, it can. Itching, redness, dryness, or flaking can occur with minoxidil use. In solution, propylene glycol can be the culprit. This is an excipient that can cause irritation in some people.

Can I use solution and foam at the same time?

Do not use solution and foam on top of each other in the same spot. If you use both forms, choose either solution or foam per zone, but never both simultaneously in the same spot. Adhere to the recommended dosage according to the package insert.

What if my scalp gets irritated?

Never use more than the recommended amount from the package insert and do not immediately combine various new scalp products. Check if you are using the product correctly and contact a doctor, dermatologist, or pharmacist if symptoms persist. When using lotion, switching to foam without propylene glycol may be an option.

View products

• Minoxidil 5% foam — without propylene glycol
• Minoxidil 5% lotion
• Minoxidil 2% lotion

References

1. Blume-Peytavi U, et al. A randomized, single-blind trial of 5% minoxidil foam once daily versus 2% minoxidil solution twice daily in the treatment of androgenetic alopecia in women. J. Am Acad Dermatology. 2011;65(6):1126–1134.
2. Olsen EA, et al. A multicenter, randomized, placebo-controlled, double-blind clinical trial of a novel formulation of 5% minoxidil topical foam versus placebo in the treatment of androgenetic alopecia in men. J Am Acad Dermatol. 2007;57(5):767-774.
3. Friedman ES, et al. Allergic contact dermatitis to topical minoxidil solution. J Am Acad Dermatol.. 2002;46(2):309–312.
4. Suchonwanit P, et al. Minoxidil and its use in hair disorders: a review. Drug Design, Development and Therapy. 2019;13:2777–2786.
5. Kanti V, et al. Evidence-based S3 guideline for the treatment of androgenetic alopecia in women and in men. Journal of the European Academy of Dermatology and Venereology. 2018.
6. Bijsluiter / productinformatie minoxidil 5% schuim. Geneesmiddeleninformatiebank.
7. Bijsluiter / productinformatie minoxidil 5% lotion. Geneesmiddeleninformatiebank.