Emotion suppression - This part has been documented as currently being far more well known than with other stimulants, and it is in-line with the noted emotion-suppressing effects that have been observed with other stimulants, but specifically methylphenidate and associated compounds. 4F-MPH has a very shorter history of recreational use. https://4fphpeffects79066.blog-mall.com/30824996/a-secret-weapon-for-4f-php