Why do antihistamines make me have severe anger? I have severe allergies, but I can't go to work being a psycho. What do I do?

Psycho meds. You must be taking a combination antihistamines with decongestant such as Allegra d or Claritin (loratadine) d or zyrtec d. It is the d as in decongestant that is making you lose your temper. Take an plain antihistamine and do yourself a huge favor, consult an allergist and control your allergies with an expert in the field. Stop wasting your time on medications.