Attached to each sugar ring is a nucleotide base, one of the four bases Adenine (A), Guanine (G), Cytosine (C), and Thymine (T). The first two (A, G) are examples of a purine which contains a six atom ring and five atom ring sharing two atoms. The second two (C, T) are examples of a pyrimidine which is composed of a single six atom ring. A base pair is one of the pairs A-T or C-G. Notice that each base pair consists of a purine and a pyrimidine. The nucleotides in a base pair are complementary which means their shape allows them to bond together with hydrogen bonds. The A-T pair forms two hydrogen bonds. The C-G pair forms three.
Tamiflu is an antiviral medication used to treat flu symptoms caused by influenza. Learn about side effects, interactions and indications.
Tamiflu (oseltamivir) and another prescription drug called Relenza (zanamivir) are approved by the Food and Drug Administration to treat the flu. Unlike flu drugs you can buy without a prescription, Tamiflu and Relenza don't just treat flu symptoms but can shorten how long you have the illness, by inhibiting the growth of the virus. And they can reduce the risk of complications such as pneumonia and respiratory failure, if you take them within 48 hours of the onset of symptoms.