Modafinil can cause anxiety, paranoia and jitteriness. Because of this, those with mental health issues such as anxiety, depression or a history of psychosis should be extremely cautious when using it.
As the effects of modafinil can last for over 12 hours, any adverse effects might last a long time and so can become particularly uncomfortable and harmful. It is therefore a good idea to start with a low dose to get a better idea of the level of the users’ tolerance.
It has been shown that modafinil can reduce the effectiveness of the oral contraceptive pill. This reduced effect can also last 1-2 months after taking modafinil.
Modafinil can also cause a decrease in appetite. Users should therefore ensure they are eating consistently throughout the day, and it is especially important that you are keeping well hydrated because dehydration can cause loss of strength, stamina and the exacerbation of common symptoms of stimulants such as anxiety, headaches, jitteriness and dizziness.
In order to counter the possible effect of insomnia, it is best to take modafinil at least 8 to 10 hours before the user plans on sleeping to ensure the main effects have sufficiently worn off.
It is also illegal to supply modafinil without a prescription. However, many sellers advertise modafinil for sale without a prescription. These sellers are unregulated and so it is not possible to guarantee that it will definitely be modafinil that is being sold. As a result, users should always test their drugs before using them.