Perforation of the nasal septum is a common finding with intranasal cocaine abuse, which occurs due to erosion of the cartilage/bone by repetitively snorting the drug. Horizontal and vertical nystagmus is a finding of PCP intoxication. Dyspnea is a non-specific finding and can often accompany chest pain for a variety of reasons, including myocardial infarction and pulmonary embolus. A friction rub is seen in the setting of chest pain due to pericarditis.