The primary use of dextromethorphan is as a cough suppressant, for the temporary relief of cough caused by minor throat and bronchial irritation (such as commonly accompanies the flu and common cold), as well as those resulting from inhaled particle irritants.
As of Q4 2016, South Korea had the fastest average internet connection in the world at 26.1 Mbit/s according to the report State of the Internet published by Akamai Technologies. South Korea's speed is almost four times faster than the world average of 7.0 Mbit/s.
According to the network analysts at Open Signal, T-Mobile has the fastest LTE network in the States. With an average download speed of 9.98Mbps overall, itâs some 3.44Mbps faster than Verizon, 3.48Mbps faster than AT&T and more than double the speed of Sprint. As an overall picture of the U.S. though it could be much be better.