Metoprolol 50 mg twice daily. Since I've had a sinus infection for a week my blood pressure has been very low. I was only on lisinopril for about two weeks. I have not taken lisinopril for about 5 days now and blood pressure is still low. I am not at home am on vacation and urgent care put me on an antibiotic for the infection. I am afraid to go back on till my blood pressure goes to normal. Is this ok?