A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.
The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.
Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.
AMPYRA® (dalfampridine) Extended Release Tablets, 10 mg, is the first and only brand prescription medicine indicated to help improve walking in adults with multiple sclerosis (MS). This was demonstrated by an increase in walking speed.
Inactive ingredients: colloidal silicon dioxide, hydroxypropyl methylcellulose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, and titanium dioxide.
IMPORTANT SAFETY INFORMATION Do not take AMPYRA if you: •have ever had a seizure, •have certain types of kidney problems, or •are allergic to dalfampridine (4-aminopyridine), the active ingredient in AMPYRA. Take AMPYRA exactly as prescribed by your doctor. Before taking AMPYRA, tell your doctor if you: •have kidney problems or any other medical conditions •are taking compounded 4-aminopyridine •are taking any other prescription or OTC medicines, such as cimetidine •are pregnant or plan to become pregnant. It is not known if AMPYRA will harm your unborn baby. •are breast-feeding or plan to breast-feed. It is not known if AMPYRA passes into your breast milk. You and your doctor should decide if you will take AMPYRA or breast-feed. You should not do both.
What are the possible side effects of AMPYRA? AMPYRA may cause serious side effects, including: ? serious allergic reactions. Stop taking AMPYRA and call your doctor right away or get emergency medical help if you have: o shortness of breath or trouble breathing o swelling of your throat or tongue o hives See “What is the most important information I should know about AMPYRA?” The most common side effects of AMPYRA include: ? urinary tract infection ? trouble sleeping (insomnia) ? dizziness ? headache ? nausea ? weakness ? back pain ? problems with balance ? multiple sclerosis relapse ? burning, tingling or itching of your skin ? irritation in your nose and throat ? constipation ? indigestion ? pain in your throat