1.   An association was formed Wednesday in Yemen to fight the effects of chewing the popular stimulant khat, an official said.

2.   An association was formed Wednesday in Yemen to support government efforts to cut down on the use of the popular stimulant khat, an official said.

3.   Yemeni President Ali Abdullah Saleh has drastically cut back on chewing a popular stimulant in an attempt to encourage his citizens to follow suit, officials said Saturday.

4.   Red wine mixed with strychnine was a popular stimulant at the turn of the century.