Dr. Sharma issues a stark, direct warning regarding the placement of Venus (Shukra) in the 6th house.
In Vedic astrology, Venus is the primary significator (Karaka) of the wife or spouse in a male's chart. The 6th house is the house of diseases, debts, and enemies (the "Roga Bhava").
When the planet of the wife sits in the house of disease, the result is inevitable. Dr. Sharma states it as an absolute rule: this placement will cause chronic, ongoing health issues for the native's wife ("patni ki sehat kharab kar dega"). The native will spend a significant amount of their wealth on her medical treatments. Specific Lal Kitab remedies for Venus are required to protect her health.