I have skin allergy , the virus is in blood.I used many types and number of madicines from past 6months.Till the problem is not solved.Some doctors said better with PPF but they are not available in the market.Then doctor said about penidure for 3 days each one per day.I didn t used any pencillin since childhood,the doctor said have to be test penidure 6 la.So my questions are,is it safe(side effects) ,will the problem eliminated,do I need to take penidure extra days?