Bp issues

Opinions please. My husband is having increased hypertension.  Taking metoprolol succinate 50mg and amlodipine 5mg. Diastolic has been staying 94-104. His primary (VA) instructed to him to add a dose of amlodipine at night too.  This was ineffective. He called the office back to update the Dr. The drs nurse called back and said the Dr said to keep doing what you are doing. In other words keep doing what isn't working. My husband has also been symptomatic. He called the office again today to let the Dr know that his bp is still up and he was having symptoms.  He asked for a Med change or increase. The drs new order, DC metoprolol, continue the amlodipine and he was adding HCTZ 25 mg qd.  I was furious.  Can anyone find the sense in that order? From everything I've learned my husbands bp will be even more elevated.   I called back and told the office nurse that my husband won't be making that change.  Is there something about amlodipine with HCTZ I don't know?!