It was perscribed to me at the same time, I have bronchitis,sinus infection also.
spt1961; I ran your 2 antibiotics through the drug interaction and this is what it said.((((Interactions between your selected drugs
doxycycline penicillin v potassium
Applies to: Doxy-Caps (doxycycline), Penicillin VK (penicillin v potassium)
Talk to your doctor before using doxycycline together with penicillin V potassium. Combining these medications may reduce the effectiveness of penicillin V potassium. Your doctor may be able to prescribe alternatives that do not interact. 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.))))) I would talk to the doctor again and make sure the doctor want you on both unless the doctor gave you both at the same time. Then it could be the doctor is trying to hit you infection stronger than normal. hope you get to feeling better very soon.
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