Quick tests for cholesterol/TG etc are not reliable and you should get lab test done. It is highly unlikely that change in your lipid profile is due to one-month medications. In clinical practice we advise lipid profile after three months of medications only. There are no lower limits of cholesterol but lower levels can be harmful especially to brain and lipid-lowering medications can adversely affect muscles and liver. Targets for LDL and HDL cholesterol are 40 mg/dl respectively. In general, levels of T-Cholesterol and LDL < 100 mg/dl and 45 mg/dl are not good for health.