Before you start preparing the cocktail, put the cocktail glass in the freezer for at least one hour. This is because the glass will be ice chilled by the time you serve the cocktail.
One by one pour all the ingredients in the cocktail shaker which is already filled with crushed ice. These ingredients should be added according to the quantity mentioned in the introduction.
Once all the ingredients are poured in the shaker, start shaking and stirring so that they are mixed perfectly.
After you are sure that the ingredients are properly mixed, bring the cocktail glass out of the freezer. Carefully pour the prepared mixture inside the chilled cocktail glass.
The Pain killer cocktail is ready to be served. You may add some paper flowers, sparklers, tropical fruits, umbrellas etc for presentation.