Hi welcome to healthcare magic
In most situations the medication can be immediately started, there is not usually a wash out period.
Your doctor may however, have a specific reason that he suggested the 15 day waiting period and you may want to speak to him for clarification.
Cholesterol can also be reduced by diet and physical activity.
In terms of diet you should try to reduce your intake of saturated fats which are associated with
heart disease. Saturated fats are found in coconut oil, palmkern seed oil, cocoa butter, butter, whole cheeses and milk, fatty meats.
Reduce your intake of
trans fat to zero if possible. Check food labels
Increase your intake of omega 3 fatty acids which protect against heart disease.These are found in salmon, sardines, tuna, flaxseed,kiwi, mackeral, herring,anchovies,trout
Increase your use of fruits and vegetables
Increase your intake of plant stanol/sterols which prevent cholesterol from being absorbed.
I hope this information is helpful to you, you need to speak to your doctor to find out why he is delaying the start of the medication