Report Abuse. It's not exactly a substitute but it's antiviral medication that is also used to help heal out breaks of herpes and viruses related to it like shingles. Also some people don't react well to acyclovir so Famvir can be used instead. LINDSEY S Â· 5 years ago.
No MRI takes more than 60 minutes. If doctors do not suggest MRI suggest then it will take 30 minutes to 45 minutes. So the question âHow Long Does an MRI Takeâ depends on the requirements of your doctor. If your radiologist has decided for an MRI of the brain plus further requirements, such as IACs (inner auditory canals), orbits or the CCJ (Cervical Cranial Junction), then the test may take 45 minutes.
A: Most MRI's are read within 24 hours and the results sent to your doctor. He should have seen the results probably 48 hours after your scan. You are getting the run around, either that or they can't find the printed MRI report that was sent to your doctor and that is why you are getting the run around.ow long will depend on why you are having the scan and where you have it done. Ask at the time/place the MRI is performed. [ Source: http://www.chacha.com/question/how-long-does-it-take-for-mri-results-to-come-back ]. More Answers to  How long does it take for MRI results to come back .