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.
Be the first to review this Drug. Efavirenz is an antiviral medication that prevents human immunodeficiency virus (HIV) cells from multiplying in your body. Efavirenz is used to treat HIV, which causes the acquired immunodeficiency syndrome (AIDS). Efavirenz is not a cure for HIV or AIDS.Efavirenz may also be used for purposes not listed in this medication guide. Do not take efavirenz together with Atripla (combination efavirenz, emtricitabine, and tenofovir), unless your doctor tells you to.ome medicines can cause unwanted or dangerous effects when used with efavirenz. Your doctor may need to change your treatment plan if you use any of the following drugs: 1  midazolam, pimozide, St. John's wort; or. 2  ergot medicine--dihydroergotamine, ergotamine, ergonovine, methylergonovine.