The reliability of sources information about medicinal raw materials of inorganic nature of Tibetan medicines has been experimentally verified. The elemental composition in raw materials and plant ashes was determined on Solaar M6 atomic-absorption spectrophotometer. It is shown that the content of elements in ashes exceeded that in plant raw material by 3.3–3.8 times for garlic and by 6.2–7.5 times for other plants. Artemisia gmelinii is the richest in mineral components, then in descending order Atragene sibirica, Scutellaria baicalensis, Rhododendron adamsii, and garlic (Allium sativum). In terms of macroelements, the maximum content of potassium was observed in the ashes of Artemisia gmelinii and Atragene sibirica. In terms of trace elements in the ash, the highest content of iron was observed in Rhododendron adamsii and Scutellaria baicalensis, manganese – Atragene sibirica and Artemisia gmelinii, zinc – Atragene sibirica, Artemisia gmelinii and Rhododendron adamsii. The study of raw materials of Tibetan medicines is important for understanding solid-phase chemical reactions in technological processes in the manufacture of medicines.