DO NOT DRINK IT WITH GRAPEFRUIT JUICE. sOME PEOPLE JUST GET FED UP WITH THE SAME POST. I SAY, DRAW SOLUTION WITH NEEDLE AND SHOOT IT JUST LIKE THAT INTO YOUR MOUTH, OPENING THE PIN FOR ME WAS A HASSLE. jUST SHOOT IT DIRECTLY INTO YOUR MOUTH. DON'T CHASE IT WITH ANYTHING, BUT IF YOU HAVE TO, JUST DRINK WATER OR SOME JUICE...NO GRAPEFRUIT. good luck