There are several ingredients that are commonly found in anti-dandruff shampoos, according to the search results. These ingredients are known to help treat and eliminate dandruff and other scalp conditions. Some of the most common ingredients include:

• Disulfide selenium: This ingredient combines sulfur, known for its purifying benefits, and selenium, known for its antifungal properties. It is effective against dandruff and seborrheic dermatitis.

• Ketoconazole: This ingredient is commonly found in prescription-strength anti-dandruff shampoos. It is effective against dandruff caused by a yeast-like fungus.

• Salicylic acid: This ingredient helps to soften and exfoliate the skin, which can help to remove flakes and reduce inflammation.

• Zinc pyrithione: This ingredient is effective against dandruff caused by a yeast-like fungus. It also has antibacterial properties.

• Coal tar: This ingredient is effective against dandruff and other scalp conditions. It works by slowing down the production of skin cells.

It is important to note that some of these ingredients, such as salicylic acid and sulfur, should be avoided by pregnant women and children. Additionally, some people may be sensitive to certain ingredients, so it is important to read the label and do a patch test before using a new anti-dandruff shampoo.

As for specific product recommendations, the search results provide several options that are recommended by dermatologists, including:

• Nizoral A-D Anti-Dandruff Shampoo: Contains 1% ketoconazole and is effective against dandruff caused by a yeast-like fungus.

• Dove DermaCare Scalp Dryness & Itch Relief Anti-Dandruff Shampoo: Contains zinc pyrithione and is effective against dandruff and scalp irritation.

• Kerium Shampoo by La Roche Posay: Contains salicylic acid and is effective against dandruff and seborrheic dermatitis.

• T/Gel Therapeutic Shampoo by Neutrogena: Contains coal tar and is effective against dandruff and psoriasis.

• Selsun Blue Maximum Strength Medicated Anti-Dandruff Shampoo: Contains 1% selenium sulfide and is effective against dandruff and seborrheic dermatitis.

It is important to note that the effectiveness of these shampoos may vary depending on the individual and the severity of their dandruff. It is best to consult with a dermatologist to determine the best course of treatment.