I don't drink tequila often but that stuff as far as liquor goes isn't so bad for your body, yes a pain killer, known to aide in digestion lowers bad cholesterol, breaks down better than most other liquors because the sugars are simple sugars and body doesn't have a hard time with them.
They were talking about it on the news this week and they say just to buy the good stuff 100% Agave. Many can go as low as 49% in USA.
The only other liquor I have read about that also has some real good properties and even better than tequila as far as liquors go is Gin.
99.9% of the time I have a glass of wine but that goes down to 50-50 in the World Showcase.