AS-19 may refer to:
*
AS-19 (drug)
AS-19 is a substance which acts as a potent agonist at the 5-HT7 receptor, with an IC50 of 0.83 nM. It reverses the amnesia induced by drugs such as scopolamine and dizocilpine and improves long-term memory acquisition, but inhibits short- ...
, a drug used to improve long-term memory
*
Kh-80, a Soviet cruise missile known to NATO as the AS-19 Koala
* , a United States Navy submarine tender in commission from 1944 to 1947, 1960 to 1992, and 1994 to 1999
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