What drug or class of drugs are these?  

And any takes on it, as to why one should or should not use it.  I do understand that your opinion shouldn't be taken as medical advice.  But I do want to hear your sincere experiences or understanding of these types of drugs. Thanks. 

Yes, it's true. It's a bit surprising you're only now hearing this; taking drugs to prevent HIV has been widely used and promoted world wide for over 10 years. Basically, anti-HIV drugs can be taken either after a high risk exposure -- called post-exposure prophylaxis, or PEP -- or before an anticipated exposure, i.e. pre-exposure prophylaxis (PrEP). Google "HIV PEP" and "HIV PrEP" to see categories like HIV PEP guidelines and HIV PrEP guidelines. PEP is taken for a month; and PrEP drugs usually are taken daily in people with very frequent exposures.

Probably you should not use either PEP or PrEP, based on the kinds of sexual exposures you have described in your previous questions -- i.e. sex with female sex workers. In most of the world, your risk for HIV is too low -- over time, you probably have under one chance in a million of ever getting HIV; as we have discussed previously, your risk after any single exposure usually has been to low to even need HIV testing, let alone PEP or PrEP. The chance of a serious health outcome from the HIV drugs likely would be higher than your risk of HIV. (Almost all PEP or PrEP use is in men having sex with other men, or after heterosexual exposure with a known infected partner. However, if your sex with women is in a geographic area with a high rate of male-female sexual transmission of the virus, you should have no trouble finding a doctor or clinic to counsel you about it and perhaps prescribe the drugs.

The details of using PEP or PrEP are fairly complex and can't go into more detail. But you can find all sorts of information online. Although I mention google above, that's only the starting point:  once you see specific online resources, please stick with those that are professionally run or moderated, and avoid those run by and for people with HIV or at risk (like Reddit for example). Good places to start would be the US CDC (www.cdc.gov/hiv), the World Health Organization, or the national public health agency wherever you are. After you've done some reading, I'd be happy to clarify any questions you have about it.

Regards-- HHH, MD