About: http://webisa.webdatacommons.org/100517100

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The specific time frame that ensures combined pharmacologic effects is difficult to determine and depends on factors such as the quantity consumed and the rate of metabolism for each substance.
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov