In addition to taking antihistamines, take multi-vitamins to boost your immune system during allergy season. 1  Cetirizine. Also known as Zyrtec, this is the best antihistamine available. 2  Loratadine. Also known as Claritin or Talavert. 3  Diphenhydramine. Also known as Benadryl.  Chlorphenamine.
Figure 7. How neurotransmitters work, part 1. Chemicals called neurotransmitters are responsible for transmitting nerve impulses across the synapse from one nerve cell to another, or from one nerve cell to a target organ or gland.
All nerves have two main functions, these are: 1  Receive signals: Nerves receive signals because they are irritable, meaning that they can respond to a stimulus. 2  Once a stimulus is received by a nerve cell it converts it to a neural impulse which passes along the nerve. Receive signals: Nerves receive signals because they are irritable, meaning that they can respond to a stimulus. 2  Once a stimulus is received by a nerve cell it converts it to a neural impulse which passes along the nerve.