It is not orally absorbed into the blood and remains in the gastrointestinal tract to eradicate C. difficile.

In all six animals tested, which included rats, dogs, rhesus monkeys, rabbits, guinea pigs and mice, the drug was well absorbed orally.

Midazolam is poorly absorbed orally with only 50 percent of the drug reaching the bloodstream.

The mushroom also contains flammutoxin, a cytolytic and cardiotoxic protein that has proven to be non-toxic when absorbed orally.

Some of the third generation drugs can be absorbed orally without the need of esterification.

Pharmacokinetic studies performed on humans and experimental animals after oral administration of chondroitin sulfate revealed that it can be absorbed orally.

Voriconazole is well absorbed orally with a bioavailability of 96%, allowing patients to be switched between intravenous and oral administration.

Meperidine is poorly absorbed orally and has a short half-life of approximately 2-3 hours.

There is no oral form available as amikacin is not absorbed orally.

Piperacillin is not absorbed orally, and must therefore be given by intravenous or intramuscular injection.