I feel that both papers give clear evidence of effectiveness, to an unknown degree. For both procaine and benzoic acid the toxicity results are fairly good, though not perfect. Out of 3,900 dentists who had extensive contract with procaine, as many as 3 percent developed hypersensitivity to it. Other drugs related to procaine, such as lidocaine, xylocaine, tetracaine, and others, show the same tendency to cause allergic reactions. Benzoic acid is a commonly used food preservative, common in fruits, and appears also in fungicidal ointments.
Benzoic acid can also cause allergies.
However, procaine tablets of 50 mg and 100 mg are available as the anesthetic Novacaine. Novacaine is sold both with and without the drug adrenalin added. Finally, some overseas companies will sell GH-3 to US residents by mail. Because the FDA forbids sale within US borders, anyone who wants to buy from overseas needs to understand that overseas suppliers will remain small and change constantly. Readers who wish to find overseas suppliers might write to some of the companies listed in Appendix 3.