Astanga Hrudaya
नासापुटं पिधायैकं पर्यायेण निषेचयेत्। उष्णाम्बुतप्तं भैष्ज्यं प्रणाड्या पिचुनाऽथवा॥१९॥
the medicine slightly warmed with the help of hot water, should be taken either in a tube or soaked in a piece of cloth, and instilled into each nostril alternately, keeping the other one closed.
english translation
nAsApuTaM pidhAyaikaM paryAyeNa niSecayet। uSNAmbutaptaM bhaiSjyaM praNADyA picunA'thavA॥19॥
hk transliteration by Sanscript