Metoprolol Succinate ER and heart

Been on Metoprolol Succinaate ER 50mg now for two years and have experienced absolutely no side effects what-so-ever. Did experience some minor vertigo from the Quinapril 10mg but cut it to 5mg and all has been just fine.

Just switched from the Quinaril to Lisinopril (highly recommend it) at 5mg and combined with the Metoprolol its keeping the BP where a 20 year old would be jealous.

I think the key to side effects is the 25mg Hydrochlorothiazide tab to keep the system flushed out and eliminate any unwanted build ups of things that cause the side effects.

Great combination and, excellent doctor's at Pima Heart in Tucson Az!

Doc recently put me on metoprolol for my rapid heartbeat with hbp its been only 5 days but i can still feel my heart racing some and i feel so tired almost like im dreaming.

I am on this site because I am looking for answers. I just realized my headaches,dizziness and flu like symptoms have increased several times over since going from Toprol XL 100mg to Metoprolol Succinate ER 100mg a little over 3 months ago. Apparently my primary care doesn't read much about these drugs after he prescribes them.
However, one other side effect I notice is what I call brain pressure and throbbing. I also take Quinapril 20mg. Who knows, maybe they work against one another. Can anyone help?
Himes

Switched to Metoprolol Succinate ER from Toprol XL at 50 mg dose once daily. For control of heart rate in A-FIB in combination with quinidine gluconate. For several years, side effect of Toprol XL was the suppression of my cluster headaches. After switching to the generic ER, the headaches are back. Very clear association with the change in medication.