Here are the major side effects of yohimbine:
Cardiovascular: Tachycardia, hypertension, hypotension (orthostatic), flushing
Central nervous system: Anxiety, mania, hallucinations, irritability, dizziness, psychosis, insomnia, headache, panic attacks
Gastrointestinal: Nausea, vomiting, anorexia, salivation
Neuromuscular & skeletal: Tremors
Miscellaneous: Antidiuretic action, diaphoresis
I am not aware of a hypersensitive scrotum being one of the significant side effects. You may want to consider a scrotal ultrasound as well as tests for infection (urinalysis as well as STD testing) for further evaluation.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Thanks,
Kevin, M.D.