**Mederma Scar Removal Cream (Mederma Advanced Scar Gel)** is a popular over-the-counter scar treatment used to help improve the appearance of scars from:

* Surgery
* Injuries and cuts
* Burns
* Acne scars
* Stretch marks (some formulations are marketed for this purpose)

### Key Ingredient

The classic Mederma scar gel contains **Cepalin®**, a botanical extract derived from onion (*Allium cepa*). Some formulations may also include moisturizing ingredients and skin-conditioning agents.

### Claimed Benefits

With regular use, Mederma may help:

* Soften and smooth scars
* Reduce the appearance of redness
* Improve scar texture
* Make scars less noticeable over time

### How to Use

* Apply a thin layer to the scar and gently massage it in.
* For **new scars**, follow the product instructions (often once daily for Advanced Scar Gel).
* For **older scars**, consistent use for several months may be recommended.
* Use only on fully healed skin unless the product instructions state otherwise.

### How Long Does It Take?

Results vary by person and scar type. Some users notice improvement after several weeks, while more significant changes may take **2–6 months** of regular use.

### Effectiveness

Research on onion-extract scar products shows mixed results:

* Some people see modest cosmetic improvement.
* Silicone-based scar gels or sheets often have stronger clinical evidence for scar management.
* Deep, raised (keloid) or severe scars may require medical treatments such as steroid injections, laser therapy, or surgery.

### Possible Side Effects

Usually mild, but can include:

* Skin irritation
* Itching
* Redness
* Dryness

Discontinue use and consult a healthcare professional if significant irritation occurs.

### Available Variants

Depending on your region, Mederma products may include:

* **Mederma Advanced Scar Gel**
* **Mederma PM Intensive Overnight Scar Cream**
* **Mederma Quick Dry Oil**
* **Mederma Stretch Marks Therapy**

If you tell me:

1. The exact Mederma product name, and
2. Whether the scar is from surgery, acne, injury, burn, or something else,

I can provide more specific guidance on expected results and proper use.