Can Caffeine Hair Lotion Stop Severe Hair Loss?

I have been experiencing severe hair loss for the past 3 months and the hair got too thin now. As suggested by a doctor, i have been put up for a 3 months medicine of Xtraglo. I feel there are no changes. Also the doctor suggested me caffeine hair lotion. But i haven t used it so far.. Can i use that lotion? Please help me...