Modasmart 400 mg is a high strength wakefulness-promoting medication containing modafinil. It is used to treat excessive daytime sleepiness associated with Narcolepsy, Shift Worker Sleep Disorder and Sleep apnea. While 400 mg is the maximum recommended daily dose for adults, it carries a higher risk of side effects.
MECHANISM OF ACTION
The exact mechanism of modafinil is not yet known. The following key brain systems are involved for excessive sleep disorders:
- Dopamine: Blocks the dopamine transporter, raising the extracellular dopamine levels.
- Norepinephrine & Serotonin: Increases activity of wakefulness centers.
- Orexin/ Hypocretin: Activates the wake-promoting orexin system in the hypothalamus.
- GABA (gamma aminobutyric acid) & Glutamate: Decreases inhibitory GABA and increases excitatory glutamate release.
KEY FEATURES
| About Modasmart 400 mg | |
| Drug class: Wakefulness promoting agent | |
| Chemical class: Diphenylmethanes |
| Product details | |
| Composition | Active ingredient:
Inactive ingredients:
|
| Dosage Form | Tablet |
| Route of administration | Oral |
| Packaging | Blister Pack |
| Pack size | 10*10 |
| Strength | 400 mg |
| Used for | Excessive sleep disorder |
| Approximate Onset of action | 30 to 60 minutes |
| Duration of action | 10 to 12 hours |
| Shelf life | 24 months after the manufacturing date |
| Storage Instructions | Store at room temperature away from sunlight and moisture |
USES
Modasmart 400 mg is used for:
- Obstructive Sleep apnea
- Narcolepsy
- Shift Worker Sleep Disorder
- Reduces fatigue
- Improves focus, concentration, etc.
DOSAGE
Modasmart 400 mg is a high strength dose and should be used only as and when prescribed by the healthcare provider. Do not exceed the limit prescribed by the physician as it can lead to overdose.
SIDE EFFECTS
- Gastrointestinal: Nausea, diarrhea, constipation, indigestion
- Sleep disturbances: Insomnia or difficulty staying asleep
- Psychological: Anxiety, nervousness and restlessness
- Physical: Headache, nervousness, back pain and stuffy nose
- Psychiatric: Mania, hallucinations, suicidal thoughts
- Cardiovascular: Chest pain, faster heart rate, irregular heartbeats
INTERACTIONS
Hormonal Birth Control
- Birth control pills, implants, and patches: Modafinil induces CYP3A4 liver enzymes, which can clear estrogen and progestin from your body too quickly.
Medications Affected by Liver Enzyme
- Cyclosporine: Modafinil can lower blood levels of this immune-suppressing drug.
- Omeprazole, diazepam: Levels may be increased; increased risk of adverse effects.
Stimulants and CNS Drugs
- Amphetamines or methylphenidate: Combined use increases strain on the heart.
- Other stimulants: modafinil and other stimulants like armodafinil when used in combination can lead to overdose.
Alcohol and Substances
- Alcohol: Can cause unpredictable physical or mental reactions.
PRECAUTIONS & WARNINGS
- If you experience a severe skin rash, hypersensitivity symptoms, or symptoms that could indicate Stevens-Johnson syndrome, toxic epidermal necrolysis, DRESS, angioedema, or anaphylaxis, stop taking modafinil right away and get medical help.
- Don’t drive or operate heavy machinery until you know how modafinil affects you, because in some people it may affect your ability to pay attention and make decisions.
- Use caution or avoid using it if you have angina, heart disease, had a recent heart attack, left ventricular hypertrophy, or mitral valve prolapse.
- Avoid it if you are allergic to modafinil or any other ingredient in the medication.
- Modafinil may decrease the effectiveness of hormonal contraceptives during treatment and for up to one month after you stop the medicine; consider using another non-hormonal method of birth control.
- If modafinil is being used to treat obstructive sleep apnea, continue CPAP therapy as directed and have your doctor routinely assess your CPAP adherence and daytime sleepiness.
CONCLUSION
Modasmart 400 mg is a modafinil-based prescription medicine used to help manage excessive daytime sleepiness associated with conditions such as narcolepsy, obstructive sleep apnea, and shift work sleep disorder. Use the medication only under the supervision of a healthcare provider as it carries the risk of overdose.








Kevin Brooks –
Modasmart 400 mg delivers strong and long-lasting alertness. It helps me stay focused, motivated, and productive during extended work hours. The effect feels smooth with no major side effects when taken responsibly. Very effective for high mental demand days.