The use of nectar pills is not emphasized in exoteric Buddhism, but very much so in Vajrayana. Most of the nectar pills were originally handed down by Guru Rinpoche and later discovered by real tertons, finders of terma (hidden treasures). It should be noted that not all nectar pills have beneficial effect. Some of the so-called nectar pills are not only devoid of any merit but can also bring harm if taken, such as preventing one from attaining liberation in future life and creating hindrances to liberation.
~ Depicted from THE RIGHT VIEW : Liberating Living Beings