On the Lung Healing page, look specifically at testimonies 1, 4, 7, 12, 16.
On the Respiratory Relief page, look specifically at testimonies 1, 8, 27.
The following information may be helpful to you. The first quote is from Kurt Schnaubelt, Ph.D. and the second is from Mark Webb, BS in Biochemistry and Plant Biology.
"Essential oils absorbed into the abdominal veins bypass the liver. They are fed directly into the heart-lung circulatory system without first being subjected to biotransformation by the liver detoxification enzyme system. Consequently, they reach the lower bronchial capillaries in their original lipophilic and volatile state, still capable of eliminating pathogenic microorganisms and dissolving and expectorating mucus.
-Schnaubelt, Kurt (2013-07-23). Medical Aromatherapy: Healing with Essential Oils. North Atlantic Books. Kindle Edition.
Nebulizer/Diffuser delivery and/or suppositories, or even high dose topical application to the inner thigh will by-pass the first pass metabolism, thus letting the EO constituents get where they need to go. Frankincense and Sandalwood are reasonable choices as well as Lemon oil (or another high limonene citrus such as Tangerine), Peppermint, Thyme ct. linalool, Tea Tree, Palmarosa, Geranium all low toxicity oils with a low incidence of sensitization.
- Mark Webb, BS in Biochemistry and Plant Biology and Diplomas in Remedial Massage and Aromatherapy