The point is that you are wrong about NTRP having to start over when it changes the delivery method. The data I provided earlier proved that the process was part of the BS process that the FDA has for making the changes.
Your biggest "concern" was absorption of the oral version. Below the FDA clearly states that animal testing is used for determining absorption. Hope this relieves your deep concern that NTRP knows what they are doing.
This is from the FDA web site.
Why are animals used for testing medical products?
Animals are sometimes used in the testing of drugs, vaccines and other biologics, and medical devices, mainly to determine the safety of the medical product.
For drugs and biologics, the focus of animal testing is on the drug’s nature, chemistry, and effects (pharmacology) and on its potential damage to the body (toxicology). Animal testing is used to measure
how much of a drug or biologic is absorbed into the blood
how a medical product is broken down chemically in the body
the toxicity of the product and its breakdown components (metabolites)
how quickly the product and its metabolites are excreted from the body
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