Calc ₳ Tub

Both are used Left-apex Pneumonia

Kent says that Calc and Tub are very similar drugs and can be used interchangeably. To these two similar and profound drugs, a third drug should be added and that is Sil

Kent says that if Tub was good, but it the disease relapsed and the remedy needed to be repeated, give Calc instead, and similarly, if Calc was good and needed to be repeated, give Tub, and you can repeat this cycle many times.