Located in southeastern New Mexico, Carlsbad Caverns lie beneath the Earth's surface and were formed when limestone was dissolved by sulfuric acid during the last ice age.
There are three types of rate control medications: Beta Blockers, which slow the heart rate and relax the blood vessels. Examples include Atenolol (TenorminÂ®), Carvedilol (Coregâ¢), Metoprolol (Toprol XLâ¢, LopressorÂ®), and Sotalol (BetapaceÂ®)
1 They increase heart rate, respiration and give us some sense of euphoria. They tend to give the user a sense of invincibility and effect sleep patterns.  Depressants: drugs that slow down body processes. These include drugs such as alcohol, barbiturates, tranquilizers and other anti-anxiety drugs. They slow down our brain processes and actually disrupt our cerebellum (the part of the brain that controls our coordination and balance).