Providers and consumers should realize that isotretinoin is a potent drug with the potential to cause birth defects and reserve its use for severe recalcitrant nodular acne. Isotretinoin is not for use in mild forms of acne and should not be shared among family members.
Most orbital motorways (or beltways) are purpose-built major highways around a town or city, typically without either signals or road or railroad crossings. In the United States, beltways are commonly parts of the Interstate Highway System. Similar roads in the United Kingdom are often called orbital motorways.
A highway and a motorway are different words for the same thing. A freeway is a specific type of highway, a highway without tolls. A turnpike is a highway with tolls. A parkway is a highway that is landscaped. This can be natural (a highway through a forest), or artificial (trees planted in the median). Also, none of these terms is very exact, and their usage varies with location and dialect.