You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the following combinations will show vasomotor reversal of Dale and explain in detail?
Adrenaline leads to increased BP by acting on α1 - receptors, and  vasodilation by action on β2 receptors. If it is administered after Phentolamine (α1 - blocker) it can lead to only vasodilation, which is termed as "Vasomotor reversal of Dale".