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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.
Tagrisso is a cancer medicine that interferes with the growth and spread of cancer cells in the body. Tagrissois used to treat non-small cell lung cancer that is positive for an abnormal EGFR gene. You doctor will test you for this gene. Tagrisso is sometimes given when the cancer has spread to other parts of the body (metastatic) or to help prevent your lung cancer from coming back after your tumor(s) has been removed by surgery.
Tagrisso may cause lung problems that may lead to death. Symptoms may be similar to those symptoms from lung cancer. Tell your doctor right away if you have any new or worsening lung symptoms, including trouble breathing, shortness of breath, cough, or fever.
Get emergency medical help if you have signs of an allergic reaction to Tagrisso (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning eyes, skin pain, red or purple skin rash with blistering and peeling). Call your doctor at once if you have: skin redness or purple spots that don't turn pale when pressed, and that still look red or bruised after 24 hours (may appear on your arms, legs, buttocks, or midsection); redness, rash, or blisters on the palms of your hands or the soles of your feet; new or worsening cough or trouble breathing; fast or pounding heartbeats; swelling in your lower legs, weight gain, feeling short of breath; a light-headed feeling, like you might pass out; low blood cell counts - fever, chills, tiredness, mouth sores, skin sores, easy bruising, unusual bleeding, pale skin, cold hands and feet; or eye problems - vision changes, watery eyes, increased sensitivity to light, eye pain or redness.