Ok, coming from an opiate abuser of 6 years, opiate addict of 4, and a regular opiate IV user of 2 years, I've done most of all the opiates out there.. codeine, hydrocodone, oxycodone, hydromorphone, oxymorphone (favorite, the CADILLAC of opiates), morphine, fentanyl, morphine diacetate (heroin), methadone, buprenorphone (currently prescribed med), kratom (some natural B.S. plant, though it is an opiate somehow and will give you slight effects of being on one.)...
My $0.2: If you are OPIATE NIAVE (Barely touch opiates, haven't done them in forever or at all) take two and see how you feel after 30 minutes. If an hour passed, and you feel you could use some more pop the 3rd one. ***Also, your weight and height play a big role. Even if you've never done an opiate in your life, but are 6ft tall and weigh 180/200, (not good with proportions, the point I'm trying to make is if you're a TALL heavy set/build/athletic guy) you can take all 3 and will be perfectly fine.. they're only 5's, the weakest of the bunch.. if you're a tall big guy, 15mg of hydrocodone is perfectly safe..
IF you do them pretty often, one a week, one every two weeks, pop all 3 at once, break them up into little pieces, or break them apart with your teeth and than swallow. But please for God's sake do not snort them. Nasal canal gets so caked up.. as a result barely any of the actual hydro gets absorbed because of the acetaminophen cake blocking it. PLUS, the bioavailability of hydrocodone is stronger orally than nasally.