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Content Reviewed By:
Dr. Sanjay Mehta
, (MBBS)
Written By:
Ms. Kavita Desai
, (B.Pharm)
Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them.

Psychiatric conditions
Use with cautionModalert 200 can precipitate or worsen psychiatric symptoms in susceptible individuals, including anxiety, agitation, irritability, mania, hallucinations, and suicidal ideation.
No, rash can occur after day 1 to 2 months of starting the medicine. The period can be very variable and cannot be predicted. You should discontinue the use of MODALERT 200MG TABLET 10'S and contact your doctor at the first sign of rash since it cannot be predicted whether the rash is serious or benign.
MODALERT 200MG TABLET 10'S is used to treat excessive sleepiness caused by narcolepsy (a condition that causes excessive daytime sleepiness). MODALERT 200MG TABLET 10'S may help decrease your sleepiness, but it will not cure your sleep disorder. However, one of the common side effects of MODALERT 200MG TABLET 10'S is trouble falling asleep, though it does not occur in everyone. Consult your doctor if you face any issues with sleep.
Yes, MODALERT 200MG TABLET 10'S is more effective than amphetamine. It not only helps to treat excessive sleepiness caused by narcolepsy (a condition that causes excessive daytime sleepiness) but also improves task performance. On comparing, it shows less association with side effects such as excess locomotor activities, anxiety, jitteriness, or rebound effects, which are seen with amphetamine.
MODALERT 200MG TABLET 10'S has a mood enhancing and mood-brightening effect. It has been tried in patients with depression.
MODALERT 200MG TABLET 10'S should be taken strictly as advised by the doctor. It can be taken with or without food. Tablets should be swallowed whole with water.
Yes, MODALERT 200MG TABLET 10'S may cause diarrhea. However, diarrhea and constipation both are equally common side effects associated with this medicine. Other common side effects related to gastrointestinal tract include abdominal pain, nausea, dry mouth, diarrhoea and indigestion.
MODALERT 200MG TABLET 10'S not only has a waking effect (helps in reducing sleepiness) but is also known for its memory-enhancing effects. It has been used in patients with Alzheimer's disease, age-related memory decline and cognitive impairment in schizophrenia.
No, do not stop taking MODALERT 200MG TABLET 10'S on your own without consulting your doctor. Sudden discontinuation of medicine may reduce the effect and with this your sleepiness may also return. Continue taking this medicine for the time recommended by your doctor, except when you experience serious side effects.
It is usually not recommended for long-term use. Studies have shown that long-term use of MODALERT 200MG TABLET 10'S can damage the memory. It also has abuse potential. In addition, its prolonged use can induce stress response (especially if you are misusing and not getting good enough sleep and remaining wakeful for consecutive days). It can also affect your immunity which may make you prone to infection.
MODALERT 200MG TABLET 10'S has abuse potential if used for longer periods. Usually, patients with a history of alcoholism and drug abuse are more likely to become addicted to MODALERT 200MG TABLET 10'S. These patients should be carefully monitored and observed for signs of misuse or abuse (drug seeking behavior).
MODALERT 200MG TABLET 10'S is a prescription medicine and should be taken only as prescribed by the doctor. It may cause serious side effects (e.g., a serious rash or a serious allergic reaction) that may affect your liver or blood cells. Seek immediate medical help on the occurrence of any such side effect as it can endanger life.
Modalert 200 is a prescription medicine containing modafinil, a wakefulness-promoting agent. It is used in adults to manage excessive daytime sleepiness associated with narcolepsy, obstructive sleep apnoea (when residual sleepiness persists despite appropriate treatment such as CPAP), and shift work sleep disorder. It helps you stay awake and reduces the tendency to fall asleep during the day, but it does not cure the underlying sleep disorder or replace adequate sleep.
The exact mechanism of action of modafinil in Modalert 200 is not fully understood. Available data suggest that it increases wakefulness by influencing several neurotransmitter systems in the brain, including dopamine and norepinephrine, and by enhancing activity in wake-promoting regions such as the hypothalamus. It also appears to reduce GABA-mediated inhibitory signals. Unlike classical stimulants, it has relatively less effect on peripheral sympathetic activity at therapeutic doses, but it can still increase heart rate and blood pressure in some individuals.
No. Modalert 200 (modafinil) is classified as a wakefulness-promoting agent rather than a classical psychostimulant. While both modafinil and amphetamine-based medicines can increase alertness, modafinil generally has a different pharmacological profile, with less pronounced effects on peripheral catecholamines at usual doses. It tends to have a lower risk of cardiovascular stimulation and dependence compared with amphetamines, but it can still cause insomnia, anxiety, elevated blood pressure, and has some potential for misuse. It should therefore be used only under medical supervision.
No. Modalert 200 is approved for specific sleep-related conditions and is not intended for cognitive enhancement or performance improvement in healthy individuals. Using modafinil without a medical indication increases the risk of side effects such as anxiety, insomnia, palpitations, mood changes, and potential psychological dependence. It may also mask underlying health problems causing fatigue. Off-label or recreational use is strongly discouraged and may be illegal in some jurisdictions.
Common side effects reported with Modalert 200 include headache, nausea, decreased appetite, dry mouth, abdominal discomfort, diarrhoea or constipation, dizziness, nervousness, anxiety, irritability, and difficulty sleeping. Some people may experience palpitations or a mild increase in blood pressure. These effects are often mild to moderate and may improve as treatment continues. If side effects are persistent, troublesome, or suddenly worsen, you should contact your healthcare professional for assessment and possible adjustment of therapy.
Although uncommon, serious adverse reactions can occur. Stop Modalert 200 and seek urgent medical attention if you develop a widespread rash, blistering of the skin or mucous membranes, peeling skin, fever with rash, swollen lymph nodes, or signs of multiorgan involvement, as these may indicate severe skin reactions such as Stevens–Johnson syndrome. Also seek immediate help if you notice chest pain, shortness of breath, irregular heartbeat, severe anxiety or agitation, hallucinations, mania, suicidal thoughts, or signs of severe allergic reaction such as facial swelling, difficulty breathing, or throat tightness.
Use of Modalert 200 during pregnancy is generally not recommended unless the potential benefit clearly outweighs the potential risk to the fetus. Some data suggest an increased risk of congenital malformations with modafinil exposure in early pregnancy, although evidence is limited. Women who are pregnant, planning pregnancy, or who become pregnant while taking modafinil should discuss alternative options with their healthcare provider as soon as possible. Effective contraception should be used during treatment and for a period after stopping, as advised by the prescriber.
Yes. Modalert 200 can induce certain liver enzymes (particularly CYP3A4), which may reduce the effectiveness of hormonal contraceptives such as combined oral pills, patches, implants, and some intrauterine systems. This can increase the risk of unintended pregnancy. Women of childbearing potential using Modalert 200 should use an alternative or additional non-hormonal contraceptive method, such as condoms or a copper intrauterine device, during treatment and for a period after discontinuation, as recommended by their healthcare professional.
Caution is required when prescribing Modalert 200 to individuals with a history of cardiovascular disease, including uncontrolled hypertension, arrhythmias, ischemic heart disease, or structural heart abnormalities. Modafinil can cause small increases in blood pressure and heart rate, and in susceptible patients this may be clinically significant. Before starting therapy, your doctor may assess your cardiovascular status and may monitor blood pressure and heart rate periodically during treatment. In patients with serious or unstable heart conditions, Modalert 200 may be contraindicated or used only with specialist supervision.
Concomitant use of Modalert 200 and alcohol is not recommended. Alcohol can unpredictably interact with modafinil, potentially worsening side effects such as dizziness, impaired judgment, mood changes, and reduced coordination. In some individuals, alcohol may blunt the wakefulness-promoting effect, while in others it may increase disinhibition or risk-taking behaviour. For safety, you should avoid or strictly limit alcohol intake while on Modalert 200 and discuss any alcohol use with your healthcare provider.
Modafinil has a lower potential for dependence compared with classical stimulants, but misuse and psychological dependence have been reported, particularly at high doses or in individuals with a history of substance use disorders. Some people may experience fatigue, low mood, or sleep disturbances after abrupt discontinuation, especially after prolonged or high-dose use. To minimize risks, Modalert 200 should be used only as prescribed, and any decision to stop or change the regimen should be made in consultation with a healthcare professional, who may recommend gradual dose reduction in some cases.
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