Hallucinogens are a diverse group of drugs that cause an alteration in perception, thought, or mood. A rather heterogeneous group, these compounds have different chemical structures, different mechanisms of action, and different adverse effects.allucinogens are a diverse group of drugs that cause an alteration in perception, thought, or mood. A rather heterogeneous group, these compounds have different chemical structures, different mechanisms of action, and different adverse effects.
Which US President served the shortest term in office? William Henry Harrison, 9th President ,who died in office on April 4, 1841.served the shortest term of any president: March 4 - April 4, 1841. He served 30 days, 12 hours, andâ¦ 30 minutes. He died of pneumonia. William Henry Harrison only held office for 32 days.
Historically speaking, one person actually served two, non consecutive terms as President of the United States of America. President Grover Cleveland, a Democrat from New York â¦, was the 22nd and the 24th President of the United States of America. As the 22nd President, he served from 1885 - 1889. As the 24th President, he served from 1893 - 1897.