According to the patent, a specific crystalline form of the drug known as polymorph C may be more effective than other versions because it is absorbed more efficiently by the body. The patent also notes that laboratory studies showed the drug reduced tumor growth and helped mice with brain tumors live longer, prompting early clinical trials to test whether the treatment is safe and effective in humans.
Photographs of Tejero wearing the tricorn patent leather hat of the Guardia Civil and brandishing a pistol at MPs on 23 February 1981 are among the most indelible images of Spain's young democracy.