Generic Depakote is used for controlling certain types of seizures in the treatment of epilepsy. It is also used to treat the manic phase of bipolar disorders (manic-depressive illness) and to prevent migraine headaches.
Generic Imitrex is used for the treatment of migraine headaches with or without aura (eg, flashing lights, wavy lines, dark spots). An aura is a strange feeling or visual disturbance that warns you of an attack. It is not used to prevent migraines.
Generic Inderal is used for treating high blood pressure or atrial fibrillation. It is used in patients with angina to decrease angina frequency and increase exercise tolerance; to decrease the risk of heart death in certain patients who have survived a heart attack; to manage certain types of tremors, a heart condition called hypertrophic subaortic stenosis, or certain symptoms of pheochromocytoma (an adrenal tumor). It is also used to prevent migraine headaches.
Generic Inderal LA is used for treating high blood pressure or atrial fibrillation. It is used in patients with angina to decrease angina frequency and increase exercise tolerance; to decrease the risk of heart death in certain patients who have survived a heart attack; to manage certain types of tremors, a heart condition called hypertrophic subaortic stenosis, or certain symptoms of pheochromocytoma (an adrenal tumor). It is also used to prevent migraine headaches.
Generic Maxalt is used for treating acute migraine headache with or without aura (flashing lights, wavy lines, dark spots) in adults. It should not be used to prevent migraines or cluster headaches. It works by narrowing dilated blood vessels in the brain, relieving migraine headaches.
Relpax is a headache medicine that narrows blood vessels around the brain. Relpax also reduces substances in the body that can trigger headache pain, nausea, sensitivity to light and sound, and other migraine symptoms. Relpax is used to treat migraine headaches.
Generic Topamax is used for treating seizures in certain patients. It may be used alone or with other medicines. It is also used to prevent migraine headaches.
Zomig is a headache medicine that narrows blood vessels around the brain. Zomig also reduces substances in the body that can trigger headache pain, nausea, sensitivity to light and sound, and other migraine symptoms. Zomig is used to treat migraine headaches. Zomig will only treat a headache that has already begun. It will not prevent headaches or reduce the number of attacks. Zomig should not be used to treat a common tension headache, a headache that causes loss of movement on one side of your body, or any headache that seems to be different from your usual migraine headaches. Use this medication only if your condition has been confirmed by a doctor as migraine headaches.
Typically, a pharmaceutical company will develop a drug and then have the exclusive right to produce that medication until the patent runs out. Once the patent has expired, the drug can be produced by a competitor at a fraction of the cost. 4RX sell generics that are identical to the brand name albeit at a much lower price. More about generics here