It also showed that there was no statistical significant difference ( p > @ ) in controlled rate of morning peak blood pressure between treatment of arotinolol combined with amlodipine and arotinolol combined with nifedipine , but there was a significant difference ( p < @ ) in controlled rate of morning peak blood pressure between arotinolol combined with nifedipine vs. felodipine and arotinolol combined with amlodipine vs. felodipine .