diazoxide vs phenytoin
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Side-by-side comparison of diazoxide and phenytoin. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
Table 1: Drugs That Affect Phenytoin Concentrations Interacting Agent Examples Drugs that may increase phenytoin serum levels Antiepileptic drugs Ethosuximide, felbamate, oxcarbazepine, methsuximide, topiramate Azoles Fluconazole, ketoconazole, itraconazole, miconazole, voriconazole Antineoplastic agents Capecitabine, fluorouracil Antidepressants Fluoxetine, fluvoxamine, sertraline Gastric acid reducing agents H 2 antagonists (cimetidine), omeprazole Sulfonamides Sulfamethizole, sulfaphenazole, sulfadiazine, sulfamethoxazole trimethoprim Other Acute alcohol intake, amiodarone,...
VYKAT XR is a medicine used to treat excessive hunger in people with Prader-Willi syndrome. It helps to control their appetite.
Phenytoin injection is used to treat certain types of seizures. It can also prevent seizures during or after neurosurgery.
VYKAT XR treats hyperphagia (excessive hunger) in people aged 4 years and older who have Prader-Willi syndrome (PWS). PWS is a genetic disorder that can cause constant hunger. This medicine helps manage the strong urge to overeat.
This medicine treats generalized tonic-clonic status epilepticus, a type of prolonged seizure. It also helps prevent and treat seizures that may happen during or after brain surgery. Sometimes, it can be used for a short time instead of the oral form of phenytoin when you cannot take the medicine by mouth.
VYKAT XR contains diazoxide choline. It is thought to work by affecting how insulin is released in the body. This helps to reduce hunger.
Phenytoin works by slowing down the signals in the brain that cause seizures. It stabilizes nerve cell membranes, reducing excessive electrical activity. This helps to prevent seizures from starting or spreading.
- • Increased hair growth
- • Swelling
- • High blood sugar
- • Rash
- • Fever
No common side effects listed.
- Hypoglycaemia 97
- Hyperglycaemia 45
- Drug Ineffective For Unapproved Indication 38
- Drug Interaction 30
- Oedema Peripheral 25
- Drug Interaction 1,547
- Seizure 1,382
- Toxicity To Various Agents 1,353
- Convulsion 1,262
- Status Epilepticus 791
VYKAT XR can cause high blood sugar, sometimes leading to a serious condition called diabetic ketoacidosis. Watch for signs like excessive thirst, frequent urination, and increased appetite with weight loss. This medicine can also cause fluid overload. Tell your doctor if you notice swelling or other signs of fluid retention.
This medicine can cause serious heart problems if given too quickly. The injection rate should not be faster than 50 mg per minute for adults, and 1 to 3 mg/kg/min (or 50 mg per minute, whichever is slower) for children. Your heart will be monitored closely during and after the injection.
It is not known if VYKAT XR can harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant. It is also not known if VYKAT XR passes into breast milk. Talk to your doctor about the best way to feed your baby if you are taking this medicine.
Taking phenytoin during pregnancy may increase the risk of birth defects. If you are pregnant or plan to become pregnant, talk to your doctor about the risks and benefits of this medicine.
How to Read This diazoxide vs phenytoin Comparison
diazoxide is classified in the Potassium Channel Opener (Hyperinsulinism) drug class, while phenytoin sits within the Anticonvulsant (Hydantoin) class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, diazoxide has 235 submissions while phenytoin has 6,335. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to diazoxide can lower the amount of phenytoin in your blood, which might make your seizure medicine work less effectively.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for diazoxide or phenytoin.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.