Good Evening. I Had A Venesection This Morning And Was

Good evening. I had a venesection this morning and was told by someone else waiting that I should not take my heart drugs prior to this treatment. I currently take 50 mg losartan/75mg dispersible asprin/40mg simvastat/2.5mg bisoprolol. I hasten to add I did have breakfast and also drank 1.5 pints of water prior to treatment. Personal I don't think it makes a difference..just wanted to ask. Thanks