Drug Interactions between aminophylline / ephedrine / guaifenesin / phenobarbital and metrizamide

Before you undergo any imaging procedure where metrizamide may be injected directly into the spine, let your doctor know if you are currently being treated with ePHEDrine. Injection of metrizamide into the spine can sometimes cause seizures, and the risk may be increased if you are also using other medications that can cause seizures such as ePHEDrine. You may be more susceptible if you are elderly, undergoing alcohol or drug withdrawal, have a history of seizures, or have a condition affecting the central nervous system such as a brain tumor or head trauma. Your doctor may want to withhold ePHEDrine for a certain length of time before and after the procedure, or you may need to be monitored more closely during the procedure. 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.

Before you undergo any imaging procedure where metrizamide may be injected directly into the spine, let your doctor know if you are currently being treated with aminophylline. Injection of metrizamide into the spine can sometimes cause seizures, and the risk may be increased if you are also using other medications that can cause seizures such as aminophylline. You may be more susceptible if you are elderly, undergoing alcohol or drug withdrawal, have a history of seizures, or have a condition affecting the central nervous system such as a brain tumor or head trauma. Your doctor may want to withhold aminophylline for a certain length of time before and after the procedure, or you may need to be monitored more closely during the procedure. 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.

Using PHENobarbital together with aminophylline may decrease the effects of aminophylline. Contact your doctor if your condition changes or if you experience breathing difficulties. If your doctor does prescribe these medications together, you may need a dose adjustment or special test to safely 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.

Information for this minor interaction is available on the professional version.