القسط الهندي
A root, also called Indian incense, historically ground and either sniffed for throat trouble or placed at the side of the mouth for pleurisy-type chest pain.
عَلَيْكُمْ بِهَذَا الْعُودِ الْهِنْدِيِّ فَإِنَّ فِيهِ سَبْعَةَ أَشْفِيَةٍ، يُسْعَطُ بِهِ مِنَ الْعُذْرَةِ، وَيُلَدُّ بِهِ مِنْ ذَاتِ الْجَنْبِ
“Use this Indian wood [costus], for it holds healing for seven ailments — sniffed for throat inflammation and given at the side of the mouth for pleurisy.” (meaning, not a literal translation)
Ibn al-Qayyim lists costus among warming remedies for the chest and respiratory tract, used as a nasal preparation or mixed into oil.