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.
Encephalitis is a sudden onset inflammation of the brain. Encephalitis with meningitis is known as meningoencephalitis. Symptoms include headache, fever, confusion, drowsiness, and fatigue. Further symptoms include seizures or convulsions, tremors, hallucinations, stroke, and memory problems. In 2013, encephalitis was estimated to have resulted in 77,000 deaths, down from 92,000 in 1990. The word is from Ancient Greek á¼Î³ÎºÎ­ÏÎ±Î»Î¿Ï, enkÃ©phalos brain, composed of á¼Î½, en, in and ÎºÎµÏÎ±Î»Î®, kephalÃ©, head, and the medical suffix -itis inflammation.