The doctor added 15 grams each of calcined dragon bone and oyster shell to the prescription.
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TCM shorthand for 煅龙骨 (calcined dragon bone, fossilized mammal bones) plus 煅牡蛎 (calcined oyster shell), a classic pair used together to sedate, anchor yang, and stop sweating. 煅 means processed by fire-calcination to enhance astringency.