How long do you have to leave it in for

I personally left it in my hair for the amount of time it took to wash my body from the neck down and then to rince my body down. I would say give it at least 5 to 10 minutes in your hair it will feel very Cooling at the same time

Can you use a conditioner after washing with this shampoo? I'm not sure whether using conditioner will interfere with the menthol.

Yes. Though consider washing lightly with a "regular" shampoo, just the hair not the scalp, between the Selsun and the conditioner.

Is this tested on animals? most products must pass fda to gain licensing. please give definitive answer.

It does not say it was NOT tested on animals, therefor the only place that can give you the answer is the company itself Chattem Inc. Chatanooga TN 37409

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Description

❄️ Fight flakes, feel fresh, and flaunt flawless hair!

TRUSTED BY THOUSANDS - Ranked #8 in Hair Shampoo with 4.7 stars from over 26,000 reviews—join the scalp care revolution.
CLEAN CONSCIOUS FORMULA - Free from SLS, parabens, phosphates, phthalates, and silicones for a pure, irritation-free cleanse.
SOOTHING COOLING SENSATION - Menthol-infused quick-lather formula delivers instant scalp relief and deep moisturization.
SOFT SILKY HAIR EVERY WASH - New cleaner formula leaves hair feeling luxuriously soft and manageable, perfect for daily confidence.
MAXIMUM STRENGTH DANDRUFF DEFENSE - Clinically proven 1% selenium sulfide formula targets flakes, itching, and redness without a prescription.

Selsun Blue Medicated Antidandruff Shampoo is a powerful 11 fl. oz. scalp treatment featuring 1% selenium sulfide for maximum dandruff control. Its menthol-enriched, quick-lather formula soothes irritation and moisturizes deeply while being free of harsh chemicals like SLS and parabens. Ideal for all hair types, it delivers soft, silky hair and proven relief from itching, flaking, and redness, making it a top-rated choice for professional-grade scalp care.

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$25.58

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Asin	B001UGL84U
Best Sellers Rank	#9 in Hair Shampoo
Item Model Number	398557
Manufacturer	Chattem Inc.
Product Dimensions	3.5 x 1.63 x 7.38 inches; 11.01 ounces
Upc	300746606109 041167606322

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