The effects drugs have upon entering the body can vary depending on which of the following a. the rate it enters the bloodstream. b. concentration c. the type of drug d. all of the above

Being an EMS provider, a diabetic, and just a normal human being, i can definetly say that "D" is the correct answer

Take for example Nitroglycerin. Nitro is used to dilate blood vessels. It is a base drug in the toolkit of emergency providers, and a lot of medicine cabinets. Normally nitro is administered through either a tablet or spray, placed underneath the tongue. The spray has an increased surface area which means it can enter the bloodstream all at once very fast. so the effects can be seen near instantaneously. Nitro can be ingested, and unless you want to die of massive hypotension you don't dump an entire years worth of pills in one go. Also Nitro tends to just be a very fast acting drug... Hence "A", "B", and "C" have been proven.  

The best way is to swollow and hold in your breath

Hiv can be transmitted through oral sex. you can get hiv through vaginal fluid and semen. if you have an open sore or cut in or near your mouth and an you get the semen or vaginal fluid of an infected person in those cuts or sores, you can get hiv