This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A substance used to prevent or treat diarrhea.

adj. Preventing or treating diarrhea.

n. A substance or drug having such capabilities.

n. a drug used to control or stop diarrhea

"An HIV-infected child, in the lap of his dying mother, antidiarrheal medicine mixing with tears on a small face that had no power to grasp the scale of the tragedy building around and within him."

medication    medicinal drug    medicament    medicine   

kaopectate    lomotil   

psycho-tropic    antiemetic    antimycobacterial    socialize    Lescol    antithrombotic    flesh-forming    antipsychotic    hypoglycemic    hay fever