1 It can explain the relationship between the strengths of an acid and its conjugate base. 2  It can explain differences in the relative strengths of a pair of acids or a pair of bases.  It can explain the leveling effect of water the fact that strong acids and bases all have the same strength when dissolved in water.
Related to HIV & AIDS. FDA Approves First Drug for HIV Prevention. July 16, 2012 -- The FDA has approved use of the HIV drug Truvada to help people at high risk avoid infection with the AIDS virus. Truvada is already approved as part of treatment regimens for people with HIV infection.
TRUVADA is a type of medicine called a nucleoside analog reverse transcriptase inhibitor (NRTI) that is used to treat HIV-1 infection in adults and teenagers (12 and older). TRUVADA is a combination therapy because it has 2 medicines in 1 pillâ emtricitabine and tenofovir disoproxil fumarate.TRUVADA is always used with other anti-HIV medicines to treat HIV-1 infection because TRUVADA alone is not a complete treatment. In people taking TRUVADA with other HIV-1 medicines to treat HIV-1 infection, common side effects include: diarrhea, nausea, tiredness, headache, dizziness, depression, problems sleeping, abnormal dreams, and rash.