Are Vikonon Tablets Supplements For Iron Deficiency?

I went to the pharmacy to get some iron tonic/tablets- the pharmacist asked why I thought I needed iron. I told him I was feeling low on energy because due to studying, I go to bed late ( between 10:30 - 11 p.m.) and wake up early ( between 2:30 - 3:30) He recommended Vikonon tablets- suggested I try 3 tablets- My check on the internet reveals its mainly for erectile dysfunction with high concentration of caffeine (65 mg_ Is there a real danger in taking this tablet?