Beta-blocker withdrawal syndrome?
D000787:Angina Pectoris / Q000139:chemically induced; D006801:Humans; D008790:Metoprolol / Q000008:administration & dosage*; D009543:Nifedipine / Q000009:adverse effects; D011412:Propanolamines / Q000008:administration & dosage*; D013375:Substance Withdrawal Syndrome
D011412:Propanolamines; D008790:Metoprolol; D009543:Nifedipine