At 48 years old I have begun to see thinning at my hairline and top of head. I have been using Lab Series Root Shampoo and Root Treatment. I also use Shieshiedo Andenosine at night. I found some Minoxidil my brother left at my house. It is a 5% solution and the expiration date was 10/04. Is this worth using or will the ingredients be too weak. I thought maybe it would be like a 2% solution so long after expiring. If i can use it, is it ok to use with my other treatments? Also, I take blood pressure medicine. Is it safe to use Minoxidil, I read it is also a blood pressure medicine. Thanks for any help you can give.