One of the following is not a 5HT receptors on antagonist
Lanreotide is a medication used in the management of acromegaly and symptoms caused by neuroendocrine tumors, most notably carcinoid syndrome. It is a long-acting analogue of somatostatin, like octreotide Refer kDT 6/e p166
Ketanserine
Lanreotide
Methylsergide
Tropisetron
Autacoids