Ive had all the above mentioned drugs in vials, straight from the clinic. Heres the deal, most drugs in vials have an added preservatice, iirc benzoate alcohol is one of them. Check the ingrediant list to see what the individual vial contains. With ketamine its usually just k, maybe some saline. If you want to snort it what you do is dump the water into a plate or something similar, leave it out overnight to dry, in the morning you will wakr up to find a layer of ketamine crystal to scrape up with a razor. Check the consentration, you usually get 1g per 10ml, sometimes its .5g per 10ml. Either way 10ml will dry out in a couple hours. If youre in a hurry you can put it over a pot of boiling water, or put it in the oven on low temp til it drys.
Same goes fir the other drugs. Benzos are a little more tricky since most of them arent water soluble, for this reason they are odten dissolved in a light benzoyl alcohol solution. Ive squirted a shot of diaz straifght from a vial into a drink, me it taste lik e it was spiked and hubrt my stomach. I dont reccomend oral fosing liquid benzos. You could try the method used with k, but i dont know why you would since you shouldnt be snortning benzos in the first place.
With opiates since they are mainly water soluble there isnt the alcohol to worry about, although there often is a preservative of some kind in there. You could try drying it out, but i would suggest leaving it in the liquid for dosing purposes and either squirt it into your nose, up your ass, or into your mouth.
Oh yeah, and in order to get the liquid out of the vial you will need a needle. Some pharmacies sell single syringes. If you are going to dry it out and dont care about the vial any more you can pop out the rubber seal with a knife, if you dont want to get a needle.
And never buy a vial without the plastic lid sealed on it. If theres no lid then look closely at the rubber seal, if you see a pin hole ask for another vial... not only could the drugs be diluted or tampered with, god knows if the person was redipping used syringes in there. Even if your not injecting you dont want an unsealed vial.