Can midodrine and metoprolol be taken together?

There is a moderate interaction between both medications meaning:

Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.

Interactions between your drugs
Moderate
metoprolol midodrine
Applies to: Metoprolol Tartrate (metoprolol), midodrine

Using metoprolol together with midodrine can affect the rhythm of your heart. Contact your doctor if you experience decreased heart rate (i.E., slow pulse, dizziness, and fainting). You may need a dose adjustment or special test if you use both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Source and more information:
https://www.drugs.com/interactions-check.php?drug_list=1615-16311,1629-0

Do contact your Dr. to clarify any doubts you may have.