by the F.D.A. considering mecamylamine is a similar compound this information needs to be included in the consent form. 2. The consent form did not say that the drug's safety was uncertain or that the only data on the safety of inhaling it came from the experience of just 20 people. 3. The form did not list any possible adverse events or risks from taking the inhaled hexamethonium. We need to include all possible risks or adverse events when taking inhaled mecamylamine or any other study drug.