Dexmethylphenidate, sold under the trade names Focalin among others, is a central nervous system (CNS) stimulant used in the treatment of attention deficit hyperactivity disorder (ADHD) and narcolepsy. It is in the phenethylamine and piperidine classes of medications. It is the active dextrorotatory enantiomer of methylphenidate.
1 Some allergies cause digestion problems as well. There are also times when you may feel nauseous after every meal. Nausea after meals can also be accompanied with other allergic symptoms, such as, hives or rashes.  Psychological â Sometimes, nausea after eating may also occur due to psychological factors.
There are several reasons why you can get nauseous while stretching (and if anyone else has other suggestions please feel free to comment!) Each of them has a different mechanism so I will explain why it happens and how to address it in detail.The three main culprits that I usually see are:A) Positioning of the head.here are several reasons why you can get nauseous while stretching (and if anyone else has other suggestions please feel free to comment!) Each of them has a different mechanism so I will explain why it happens and how to address it in detail. The three main culprits that I usually see are: A) Positioning of the head.