Give 1mg of Benadryl per pound such that if your dog weighs 30 pounds, you should give it 30 mg of Benadryl. Talk your veterinarian - while antihistamines are generally safe, there are the potential for side effects particularly if your dog has chronic organ failure (renal failure, liver failure, congestive heart failure, etc.).
1 Encephalitis is inflammation of the brain. 2  Meningitis is inflammation of the membranes (called meninges) that surround the brain and spinal cord.  Both encephalitis and meningitis can be caused by bacteria or viruses, and rarely a fungus, or be noninfectious.
Encephalomyelitis: Inflammation of both the brain and the spinal cord. Encephalomyelitis can. be caused by a variety of conditions, including viruses that infect the nervous system.One type. of encephalomyelitis, acute disseminatedencephalomyelitis, occurs most commonly after an acute viral infection, such as measles (rubeola).It is due to an autoimmune attack on the nervous system, meaning that the immune system mistakenly attacks body tissue that it believes to be the measles virus.ne type. of encephalomyelitis, acute disseminatedencephalomyelitis, occurs most commonly after an acute viral infection, such as measles (rubeola). It is due to an autoimmune attack on the nervous system, meaning that the immune system mistakenly attacks body tissue that it believes to be the measles virus.