Network protocols that use aggressive retransmissions to compensate for packet loss due to congestion can increase congestion, even after the initial load has been reduced to a level that would not normally have induced network congestion. Such networks exhibit two stable states under the same level of load.
Beta blocker. Beta blocker, also written Î²-blocker, is a class of medications that are particularly used to manage cardiac arrhythmias, and to protect the heart from a second heart attack (myocardial infarction) after a first heart attack (secondary prevention).
Some drugs used to treat heart disease may also interact with clonidine and cause side effects. Types of drugs that interact with clonidine include: 1  Blood pressure medications called beta-blockers, such as acebutolol (Sectral), atenolol (Tenormin, in Tenoretic), and betaxolol (Kerlone).