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.
William Henry Harrison holds the record for shortest term served, holding the office of presidency for 31 days before dying. Harrison was the first president to die while in office when he caught pneumonia and died on April 4, 1841. On July 9, 1850, Zachary Taylor died from acute gastroenteritis. Abraham Lincoln was the first president to be assassinated. He was shot behind his left ear by John Wilkes Booth on April 14, 1865.