Fosolin 150mg Injection: Complete Medicine Guide
Clinical Reference Standards: CDSCO (Central Drugs Standard Control Organisation), Indian Pharmacopoeia (IP) & WHO | Last Updated: September 2026
When to Call Your Doctor IMMEDIATELY
- Severe dizziness, fainting, or lightheadedness
- Slow or irregular heartbeat
- Chest pain or difficulty breathing
- Swelling of face, lips, tongue, or throat
- Rash, blisters, or peeling skin
- Pain, swelling, or discoloration at the injection site
- Yellowing of skin or eyes, dark urine
- Unusual bleeding or bruising
- Confusion, slurred speech, or unsteady gait
If experiencing severe symptoms, call emergency services immediately.
What is fosolin 150mg injection used for?
Fosphenytoin injection is a prodrug of phenytoin used to treat status epilepticus and prevent seizures during neurosurgery. It is given intravenously or intramuscularly by a healthcare professional. It works by blocking sodium channels in the brain to stop seizure spread. Common side effects include dizziness, drowsiness, and injection site pain. Serious risks include low blood pressure, slow heart rate, and severe allergic reactions. It must be administered slowly with monitoring.
- Generic Name: Fosphenytoin (150mg)
- Manufacturer: Zydus Cadila
- Form: Allopathy
- Pregnancy Category: Consult doctor
- Prescription Required: Yes
🇮🇳 fosolin 150mg injection के बारे में (Hindi Summary)
उपयोग: यह दवा फोस्फेनिटोइन का इंजेक्शन है, जिसका उपयोग दौरे (मिर्गी) को रोकने और इलाज करने के लिए किया जाता है। इसका मुख्य उपयोग स्टेटस एपिलेप्टिकस (लगातार दौरे) के इलाज में किया जाता है। यह न्यूरोसर्जरी के दौरान दौरे को रोकने के लिए भी दिया जाता है। जब मरीज मुंह से दवा नहीं ले सकता, तब यह इंजेक्शन के रूप में दिया जाता है। यह दवा दिमाग में सोडियम चैनल को ब्लॉक करके दौरे को फैलने से रोकती है। यह दवा सिर्फ अस्पताल में डॉक्टर या नर्स द्वारा ही दी जाती है। इसे धीरे-धीरे इंजेक्ट किया जाता है और इस दौरान ब्लड प्रेशर और दिल की धड़कन की निगरानी की जाती है।
साइड इफेक्ट्स: आम दुष्प्रभावों में चक्कर आना, नींद आना, सिरदर्द, जी मिचलाना, उल्टी, कब्ज और इंजेक्शन की जगह दर्द या जलन शामिल हैं। गंभीर दुष्प्रभावों में ब्लड प्रेशर का बहुत कम हो जाना, दिल की धड़कन धीमी होना, अनियमित धड़कन और दिल का दौरा पड़ना शामिल है। कुछ मामलों में गंभीर एलर्जी, त्वचा पर लाल चकत्ते, छाले और त्वचा का छिलना भी हो सकता है। इंजेक्शन की जगह पर त्वचा का रंग बैंगनी होना और सूजन आना भी एक गंभीर दुष्प्रभाव है। अगर आपको कोई भी असामान्य लक्षण दिखे तो तुरंत डॉक्टर को बताएं।
सुरक्षा सलाह: यह दवा केवल अस्पताल में योग्य डॉक्टर या नर्स द्वारा ही दी जानी चाहिए। इसे धीरे-धीरे इंजेक्ट किया जाता है ताकि दिल और ब्लड प्रेशर पर बुरा असर न पड़े। इंजेक्शन के दौरान और बाद में ब्लड प्रेशर, दिल की धड़कन और ईसीजी की निगरानी की जाती है। अगर आपको दिल, लीवर या किडनी की बीमारी है या किसी दवा से एलर्जी है तो डॉक्टर को पहले बताएं। इस दवा को लेने के बाद तब तक गाड़ी न चलाएं जब तक आपको इसका असर पता न चल जाए। शराब न पिएं। अगर आप गर्भवती हैं या गर्भवती होने की योजना बना रही हैं तो डॉक्टर को बताएं। बिना डॉक्टर की सलाह के दवा न रोकें और न ही डोज बदलें।
💊 fosolin 150mg injection Uses & Benefits
[{"condition":"Status epilepticus","description":"Used for the rapid control of generalized tonic-clonic status epilepticus and other types of seizures that do not stop.","evidence":"Well-established"},{"condition":"Seizure prophylaxis in neurosurgery","description":"Given to prevent seizures during and after neurosurgical procedures.","evidence":"Well-established"},{"condition":"Short-term substitution for oral phenytoin","description":"Used when oral phenytoin cannot be taken due to surgery, illness, or inability to swallow.","evidence":"Well-established"}]
Off-label uses: [{"condition":"Refractory status epilepticus","description":"Sometimes used after benzodiazepines fail, though evidence for superiority over other agents is limited.","evidence":"Limited"}]
Primary treatment for: Status epilepticus
Also treats: Neurosurgery seizure prophylaxis, Short-term substitution for oral phenytoin
📋 Drug Information
| Generic Name(s) | Fosphenytoin (150mg) |
| Brand Name | fosolin 150mg injection |
| Manufacturer | Zydus Cadila |
| Packaging / Form | Varies by brand (Allopathy) |
| Therapeutic Class | NEURO CNS |
| Action Class | Sodium channel modulators (AED) |
| Route of Administration | Parenteral (intravenous or intramuscular injection) |
| Storage | Store at 20°C to 25°C (68°F to 77°F). Brief exposure to temperatures up to 30°C (86°F) is permitted. Do not freeze. Protect from light. Keep vials in the original carton until use. |
| Shelf Life | 24 months from the date of manufacture. |
| WHO Guideline | Not established from the available information. |
| ICMR Guideline | Not established from the available information. |
👨⚕️ Doctor's Practical Tips
Evidence-based practical advice from experienced clinicians
🔍 Is This Medicine Right for Your Symptom?
Educational reference. Always consult a doctor for diagnosis.
🔬 How This Medicine Works (Pharmacology)
Pharmacokinetics
How It Works
Fosphenytoin is a prodrug that is rapidly converted to phenytoin by phosphatases in the body. Phenytoin exerts its anticonvulsant effect primarily by blocking voltage-gated sodium channels in the brain. This action prolongs the inactivation state of the sodium channels, reducing the ability of neurons to fire at high frequencies. As a result, the spread of seizure activity from the seizure focus is limited. Phenytoin also affects calcium channels and may influence neurotransmitter release, but sodium channel blockade is the main mechanism.
Mechanism Steps
💡 How to Take fosolin 150mg injection
Strength: Injection: 150 mg fosphenytoin sodium per vial (equivalent to 100 mg phenytoin sodium equivalents).
Dosage Information
| Adult Dosage | The dose of this medicine is individualized by a qualified clinician based on the indication, patient's weight, renal and hepatic function, and clinical response. For status epilepticus, a typical loading dose is 15 to 20 mg phenytoin equivalents (PE) per kg given intravenously at a rate not exceeding 50 mg PE per minute in adults. For non-emergent replacement, the dose is usually the same as the oral phenytoin dose, converted to PE. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function. |
| Pediatric Dosage | Pediatric dosing is not established from available information. Consult a pediatrician. |
| Elderly Dosage | Elderly patients may require lower doses due to decreased hepatic and renal function. Start with lower doses and monitor closely. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function. |
| Renal Impairment | No specific dose adjustment is provided in the labeling for renal impairment. However, fosphenytoin injection contains propylene glycol, which can accumulate in renal failure. Monitor closely and consider alternative therapy if severe renal impairment. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function. |
| Hepatic Impairment | Use with caution in patients with hepatic impairment. Phenytoin is metabolized in the liver, and liver disease can increase phenytoin levels. Dose reduction and close monitoring of phenytoin levels are recommended. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function. |
| Maximum Daily Dose | The maximum daily dose is not fixed and depends on the clinical situation. In general, the total daily dose should not exceed the equivalent of 20 mg PE/kg for loading, and maintenance doses are adjusted to maintain therapeutic phenytoin levels (10-20 mcg/mL total, or 1-2 mcg/mL free). Doses above these may increase the risk of toxicity. |
Dosage Timeline
🍽️ Food Timing Guide
⏰ What to Do If You Miss a Dose
⚠️ Side Effects of fosolin 150mg injection
✅ Common Side Effects
🚨 Serious Side Effects
⚠️ Rare Side Effects
Consult your doctor if you experience any unusual symptoms.
🔬 Drug Interactions
| Drug | Severity | Effect |
|---|---|---|
| Warfarin | Major | |
| Oral contraceptives | Major | |
| Diazepam | Major | |
| Corticosteroids | Major | |
| Carbamazepine | Moderate | |
| Valproic acid | Moderate | |
| Fluconazole | Moderate | |
| Omeprazole | Minor | |
| Folic acid | Minor | |
| Antacids | Minor |
🚨 Major Interactions
- Warfarin
- Oral contraceptives
- Diazepam
- Corticosteroids
⚡ Moderate Interactions
- Carbamazepine
- Valproic acid
- Fluconazole
🍷 Alcohol Interaction
Alcohol should be avoided while receiving this medicine because it can increase the sedative effects and may affect phenytoin levels. Chronic alcohol use can decrease phenytoin levels, while acute alcohol intake can increase them, leading to toxicity.
🔎 Check Your Other Medicines
Educational tool. Always confirm with your doctor or pharmacist.
🛡️ Safety & Warnings
🚫 Contraindications
["Hypersensitivity to fosphenytoin, phenytoin, or any component of the formulation","Sinus bradycardia","Sinoatrial block","Second- and third-degree atrioventricular block","Adams-Stokes syndrome","History of hepatic failure due to phenytoin","Porphyria"]
⚠️ Warnings & Precautions
["Administer slowly to avoid severe cardiovascular reactions.","Monitor blood pressure and ECG continuously during infusion.","Use with caution in patients with heart disease, liver disease, or kidney disease.","May cause drowsiness; avoid driving or operating machinery.","Serious skin reactions (Stevens-Johnson syndrome, toxic epidermal necrolysis) can occur; discontinue at first sign of rash.","Purple glove syndrome can occur; monitor injection site.","May interact with many drugs; review all medications.","Phenytoin levels can be affected by enteral feedings; separate oral phenytoin from feedings.","Use in pregnancy only if clearly needed; risk of fetal harm.","Elderly patients may be more sensitive to effects."]
🤱 Lactation Safety
Phenytoin is excreted in breast milk in small amounts. The amount is generally considered safe, but the infant should be monitored for drowsiness, poor feeding, or other signs of toxicity. Consult your doctor before breastfeeding while receiving this medicine.
💊 Overdose Management
Overdose of fosphenytoin can cause severe hypotension, bradycardia, cardiac arrhythmias, and central nervous system depression. There is no specific antidote. Treatment is supportive and symptomatic, including monitoring of vital signs, ECG, and phenytoin levels. Hemodialysis may be considered in severe cases, but phenytoin is not effectively removed by dialysis. Contact a poison control center immediately if overdose is suspected.
⏰ Missed Dose
This medicine is given by a healthcare professional in a controlled setting, so missed doses are unlikely. If a scheduled dose is missed, it should be administered as soon as possible, but the dosing interval should be adjusted to avoid excessive levels. Do not double the dose. Consult the prescribing doctor for specific instructions.
Additional Safety Advice
This medicine must only be given by a qualified healthcare professional in a setting equipped to monitor heart rhythm and blood pressure. It should be injected slowly, not faster than 50 mg phenytoin equivalents per minute in adults, to reduce the risk of serious heart problems. Your doctor will monitor your blood pressure, heart rate, and electrocardiogram during and after the injection. Inform your doctor if you have heart disease, liver disease, kidney disease, or a history of allergies. Do not drive or operate machinery until you know how this medicine affects you. Avoid alcohol while receiving this medicine. If you are pregnant or planning to become pregnant, tell your doctor, as this medicine may harm the unborn baby. If you are breastfeeding, consult your doctor before use. Do not stop or change the dose without medical advice. Keep all follow-up appointments for blood tests and monitoring.
👴 Special Considerations for Elderly
💡 For Patients Above 65
Elderly patients are more sensitive to the cardiovascular effects of fosphenytoin and may require lower doses. Monitor blood pressure and heart rhythm closely. Also, assess for drug interactions due to polypharmacy.
🤰 Pregnancy Planning (TTC)
If you are planning to become pregnant, discuss with your doctor before starting or continuing fosphenytoin. It may cause birth defects. Effective contraception is recommended during treatment. Folic acid supplementation may be advised.
🏥 Post-Surgery Considerations
Fosphenytoin is often used after neurosurgery to prevent seizures. It may be continued until the risk of seizures decreases. Monitor for side effects and interactions with other postoperative medications.
🦷 Dental Procedures
Inform your dentist that you are receiving fosphenytoin, as it can cause gingival hyperplasia and may interact with anesthetics or other medications. Good oral hygiene is important.
💚 Lifestyle Tips for Better Results
🏋️ Exercise Considerations
Avoid activities that could be dangerous if you experience dizziness or drowsiness, such as swimming alone, cycling, or operating heavy machinery. Consult your doctor before starting any new exercise program.
🥗 Diet Recommendations
💼 Impact on Daily Work & Life
Fosphenytoin can cause drowsiness and dizziness, which may affect your ability to drive or operate machinery. Avoid these activities until you know how the medicine affects you. It may also require time off work for hospital administration and monitoring.
🛑 When to Stop This Medicine
Fosphenytoin is usually stopped when the patient can take oral medication or when the risk of seizures has passed. Do not stop this medicine without consulting your doctor, as abrupt withdrawal can cause seizures.
📅 Long-Term Use Effects
Long-term use of phenytoin, the active metabolite of fosphenytoin, can lead to gingival hyperplasia, coarse facial features, peripheral neuropathy, and decreased bone density. Regular monitoring of phenytoin levels, liver function, and blood counts is recommended. Fosphenytoin is usually used short-term, so long-term effects are more relevant to oral phenytoin therapy.
🌿 Non-Medicine Approaches
These can complement medicine but do not replace prescribed treatment.
Used for long-term seizure control once oral intake is possible.
Evidence: Well-establishedAlternative antiepileptic with different mechanism and side effect profile.
Evidence: Well-establishedAlternative for status epilepticus and seizure prophylaxis.
Evidence: Well-established💉 Vaccination Considerations
💉 If You're Getting Vaccinated
No specific interactions with vaccines are known. However, phenytoin may reduce the immune response to some vaccines. Consult your doctor regarding vaccination timing.
📦 Storage Guide
✅ DO
Store at 20°C to 25°C (68°F to 77°F)
❌ DON'T
Do not freeze
✅ DO
Keep in original carton to protect from light
❌ DON'T
Do not use if solution is discolored or contains particles
✅ DO
Use immediately after dilution
❌ DON'T
Do not store diluted solution for later use
✈️ Traveling with This Medicine
This medicine is given in a hospital setting, so travel advice is limited. If you are prescribed fosphenytoin for home infusion (rare), carry it in its original packaging with the prescription label. Keep it at room temperature and protect from light. Carry a copy of your prescription and a letter from your doctor explaining the need for the injection. Check with airlines and customs about carrying injectable medications. For international travel, ensure you have enough supply and a plan for administration by a healthcare professional.
💰 Cost Analysis & Savings
👥 Real Patient Stories
Educational, anonymized scenarios. Individual results may vary.
💬 Questions Patients Often Ask
A: When given intravenously, fosphenytoin starts working within 10 to 30 minutes. The effect can last for 12 to 24 hours.
A: No, fosphenytoin is typically given in a hospital or clinic setting where vital signs and heart rhythm can be monitored. Home administration is not recommended.
A: The most serious side effects include severe low blood pressure, slow heart rate, irregular heart rhythms, and severe allergic reactions. These require immediate medical attention.
A: Fosphenytoin may harm the unborn baby. It should be used during pregnancy only if the potential benefit justifies the risk. Discuss with your doctor.
🤔 Common Patient Concerns
🔄 Substitutes for fosolin 150mg injection
View AllAlternative brands with exact same active ingredient:
-
Rapitoin 150mg InjectionEmcure Pharmaceuticals Ltd ₹30.94 66.7% CHEAPER
-
fosphen 150mg injectionIntas Pharmaceuticals Ltd ₹47.81 48.5% CHEAPER
Medical Note: Always consult your doctor before switching medications.
🛑 Myths vs. Facts
- Myth: Fosphenytoin is the same as phenytoin.
Fact: Fosphenytoin is a prodrug that is converted to phenytoin in the body. It is more water-soluble and can be given intramuscularly, but its active form is phenytoin. - Myth: Fosphenytoin can be given rapidly for faster effect.
Fact: Fosphenytoin must be infused slowly to avoid severe cardiovascular reactions such as low blood pressure and arrhythmias. - Myth: Fosphenytoin is safe for everyone with seizures.
Fact: It is contraindicated in certain heart conditions and should be used with caution in liver or kidney disease.
🔄 Alternative Options
Generic Alternatives
- Fosphenytoin sodium injection
Brand Alternatives
- Fosolin 150mg injection