Is Valium and or Tylenol considered a fat soluble med? If diluted is the absorbtion lessened?

Tylenol as well as Valium are not fat soluble drugs. If they were, there would be residual bits of the drug stored away in fat cells such as is the case with pot. Valium does have a crazy long half life, but is simply a medication that takes a very long time for it to exit the system. Tylenol on the other hand leaves the system pretty quickly.

Now, if to much Tylenol was taken, it would simply have a very bad effect on the liver, and water would most likely have a very very minor effect on this, after all, if you drink tons of water, your system in return gets rid of the water, but is a totally different issue than the elimination of the medications.

I am not certain about the charcoal, but it does make sense hypothetically. If you're able to somehow trap the tylenol with the charcoal, preventing its journey onto the liver, that would make sense.

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With a drug like Valium, it is extremely rare to have someone overdose on that med, as it's not only very weak, but an overdose would include a person sleeping for a long time, and in very very rare cases, possibly a coma. Benzos are really only truely dangerous when mixed with other depressant type drugs.

I'm sorry that I was not able to answer all of the question, but hope that this is of some help!
Sincerely,
Jeff K