Drug Interactions between Flexeril and Urelle
This report displays the potential drug interactions for the following 2 drugs:
- Flexeril (cyclobenzaprine)
- Urelle (hyoscyamine/methenamine/methylene blue/phenyl salicylate/sodium biphosphate)
Interactions between your drugs
cyclobenzaprine methylene blue
Applies to: Flexeril (cyclobenzaprine) and Urelle (hyoscyamine / methenamine / methylene blue / phenyl salicylate / sodium biphosphate)
If you are currently being treated with cyclobenzaprine, let your doctor know before you receive methylene blue. Combining these medications can increase the risk of a rare but serious condition called the serotonin syndrome, which may include symptoms such as confusion, hallucination, seizure, extreme changes in blood pressure, increased heart rate, fever, excessive sweating, shivering or shaking, blurred vision, muscle spasm or stiffness, tremor, incoordination, stomach cramp, nausea, vomiting, and diarrhea. Severe cases may result in coma and even death. Depending on your condition, your doctor may want you to discontinue cyclobenzaprine for at least two weeks before you start treatment with methylene blue, or prescribe an alternative medication. Otherwise, you will need to be closely monitored by your doctor during treatment. 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.
sodium biphosphate phenyl salicylate
Applies to: Urelle (hyoscyamine / methenamine / methylene blue / phenyl salicylate / sodium biphosphate) and Urelle (hyoscyamine / methenamine / methylene blue / phenyl salicylate / sodium biphosphate)
The following interaction applies only to products containing sodium biphosphate that are used for bowel cleansing. It does not apply to products containing sodium biphosphate that are used for other, non-laxative related purposes.
Bowel cleansing with sodium biphosphate can cause kidney failure, in some cases up to several months after the procedure. Although it rarely occurs, the risk is increased in individuals receiving treatment with phenyl salicylate, especially if they are also elderly or frail. You may need a dose adjustment or special tests to safely use both medications. Combining these medications may also increase the risk of dehydration and electrolyte abnormalities. In severe cases, dehydration and electrolyte abnormalities can lead to irregular heart rhythm, seizures, and kidney problems. You should use sodium biphosphate exactly as prescribed by your doctor, and drink plenty of clear fluids before, during, and after the cleansing process to keep yourself hydrated. Your doctor may also recommend an electrolyte rehydration solution that you can use. Talk to your doctor if you have any concerns. 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.
cyclobenzaprine hyoscyamine
Applies to: Flexeril (cyclobenzaprine) and Urelle (hyoscyamine / methenamine / methylene blue / phenyl salicylate / sodium biphosphate)
Using cyclobenzaprine together with hyoscyamine may increase side effects such as drowsiness, blurred vision, dry mouth, heat intolerance, flushing, decreased sweating, difficulty urinating, abdominal cramping, constipation, irregular heartbeat, confusion, and memory problems. Side effects may be more likely to occur in the elderly or those with a debilitating condition. You should avoid or limit the use of alcohol while being treated with these medications. Also avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medications affect you. Talk to your doctor if you have any questions or concerns. 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.
cyclobenzaprine sodium biphosphate
Applies to: Flexeril (cyclobenzaprine) and Urelle (hyoscyamine / methenamine / methylene blue / phenyl salicylate / sodium biphosphate)
The following interaction applies only to products containing sodium biphosphate that are used for bowel cleansing. It does not apply to products containing sodium biphosphate that are used for other, non-laxative related purposes.
cyclobenzaprine can occasionally cause seizures, especially if you are elderly, alcoholic, undergoing alcohol or drug withdrawal, have a history of seizures, or have a condition affecting the central nervous system like a brain tumor or head trauma. The risk is also increased if you have low blood levels of electrolytes such as calcium, magnesium, potassium or sodium, which can occur with bowel cleansing preparations or excessive use of medications that have a laxative effect. You should use sodium biphosphate exactly as prescribed by your doctor, and drink plenty of clear liquids before, during, and after the cleansing process to avoid becoming dehydrated. Your doctor may be able to recommend specific fluids you can drink before starting sodium biphosphate to help maintain your electrolyte levels. Contact your doctor if you experience signs and symptoms of low electrolyte levels such as weakness, tiredness, drowsiness, dizziness, confusion, tingling, numbness, muscle pain, cramps, nausea, or vomiting. 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.
Drug and food interactions
cyclobenzaprine food
Applies to: Flexeril (cyclobenzaprine)
Alcohol can increase the nervous system side effects of cyclobenzaprine such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with cyclobenzaprine. Do not use more than the recommended dose of cyclobenzaprine, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. Talk to your doctor or pharmacist if you have any questions or concerns.
sodium biphosphate food
Applies to: Urelle (hyoscyamine / methenamine / methylene blue / phenyl salicylate / sodium biphosphate)
Oral medications may not be properly absorbed when they are taken within one hour before starting sodium biphosphate for bowel cleansing. Talk to your doctor or pharmacist to see if you should adjust the dosing schedule of your other medications before you begin bowel cleansing treatment. 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.
hyoscyamine food
Applies to: Urelle (hyoscyamine / methenamine / methylene blue / phenyl salicylate / sodium biphosphate)
Ask your doctor before using hyoscyamine together with ethanol. Use alcohol cautiously. Alcohol may increase drowsiness and dizziness while you are taking hyoscyamine. You should be warned not to exceed recommended dosages and to avoid activities requiring mental alertness. If your doctor prescribes these medications together, you may need a dose adjustment to safely take this combination. 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.
Therapeutic duplication warnings
No warnings were found for your selected drugs.
Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.
See also
Drug Interaction Classification
Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. | |
No interaction information available. |
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Check Interactions
To view an interaction report containing 4 (or more) medications, please sign in or create an account.
Save Interactions List
Sign in to your account to save this drug interaction list.