Modafinil, as a substance, is sold under several brand names, each of which has a slightly different formula. While this does not mean that the differences are considerable, some are of greater quality than others. Also, some brands are available worldwide, while others are only marketed in certain countries.
First of all, it is important to keep in mind that Modafinil is the generic name. The biggest Modafinil products manufacturer is Provigil, which is also considered to be the most popular. The tablets are available anywhere in the world and can be ordered online without a prescription.
Secondly, each of these brands is regulated by governments and health organizations from all over the world, so each is safe to use, provided that they were prescribed to you by a doctor.
Other popular brands are Alerted, Modvigil, Modalert, and Waklert. Each one of these is used in order to treat the symptoms of narcolepsy and other similar illnesses, however, they are slightly different in terms of ingredients, concentration, and pricing. This having been said, they will all be effective, but some individuals may encounter fewer side effects from certain brands than from others. In this respect it is more a matter of trial and error until you find the product that works best for you.
Many reviews from www.buyprovigilonline.com individuals who have used several brands over the course of their treatments show that 200mg Modalert tends to be the most effective at promoting wakefulness without side effects that may appear after using it for extended periods of time. Modvigil is also considered to be effective, however, it is generally more affordable than other brands.