About 71 percent of the Earth's surface is water-covered, and the oceans hold about 96.5 percent of all Earth's water. Water also exists in the air as water vapor, in rivers and lakes, in icecaps and glaciers, in the ground as soil moisture and in aquifers, and even in you and your dog. Water is never sitting still. If all of the world's water was poured on the contiguous United States, it would cover the land to a depth of about 107 miles (145 kilometers). 2  Of the freshwater on Earth, much more is stored in the ground than is available in lakes and rivers.
If you happen to take too much Namenda, overdose symptoms may include drowsiness, changes in heart rhythm, vomiting, and unconsciousness. NamendaÂ® (memantine hydrochloride) is a prescription medication used to treat Alzheimer's disease. It belongs to a group of medications known as NMDA receptor antagonists.
Namenda is a newer Alzheimerâs drug that acts differently than those in the past. Although it will not stop the disease, it may temporarily reverse some symptoms or slow the disease development. With new drugs in particular, but really any drug we constantly learn how good they are, about new uses and side effects as more patients are treated for longer periods of time.