Bronchospasms symptoms and conditions

Hi my history started from last couple months when I realize my bp went up very high(160/100) so I started metoprolol succinate 25mg,for couple days i felt fine and my bp went down but I noticed some pain in my right side so i thought maybe is the liver problem and i started to get off.After a week i was suffered from withdrawal(first week i decreased dose to 12,5mg)then my bp was very high so i called doctor and he prescribed metoprolol 100 mg and lisinopril 25(i never used this one)and hydloxiazyde 12,5 and i felt better for couple weeks then I started to get heart palpitation and very low bp so I quit hydroxiazyde and now I'm on toprol xl (oryginal brand) and still have chest tightness (i switch metoprolol to toprol one day ago)and how you guys divide the tablets to get exact amount its hard

I was on toprol-xl for almost 8 years without many problems. i also take isosorbide mononitrate.A few months back I was switched to the generic version (metoprolol succinate er by sandoz) now i have many problems.First I have to say I am disabled with severe COPD. Although I do not feel depressed I have a lot of symptoms of depression. Remember I had no symptoms what so ever until switched by Walgreen's or HMO or Doctor to the generic version. Not sure what to do I have a doctor that does not truly listen,plus he did not want me on toprol xl to begin with. Even though it was good for me. Good luck people!