The new generation The research of Snake weed has found new interest for gatas-gatas (tawa-tawa) for its use in dengue, with increasing anecdotal reports of "cures." Decoction preparation: four grasp of gatas-gatas plants. Rinse. Put the tawa-tawa into a pot of boiling water for one minute. Cool and Drink 1 to 1 1/2 glasses, every hour for 24 hours.