Hi I am a male 27.From my childhood, i was suffering Anxiety, low self esteem.At that i was not aware about my problem.But Now after reading a lot in internet. 2 years back i finally found that i have some mental issues including Anxiety, loneliness .Then again reading a lot in internet i started taking Piracetam and modafinil.It improves me alot.Now i have much better self confidence.I feel more motivated.Is it safe for long time use??