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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.
envoya is a tablet containing a combination of cobicistat, elvitegravir, emtricitabine, and tenofovir. Cobicistat reduces the action of enzymes in your liver that break down certain antiviral medicines. This allows the antiviral medicines to be used more safely and effectively at lower doses. Elvitegravir, emtricitabine and tenofovir are antiviral medicines that prevent human immunodeficiency virus (HIV) from multiplying in your body. HIV can cause acquired immunodeficiency syndrome (AIDS). Genvoya is used to treat HIV in adults and children who are at least 12 years old and who weigh at least 55 pounds (25 kilograms). Genvoya is not a cure for HIV or AIDS.
Take Genvoya exactly as prescribed by your doctor. This medicine is usually taken once per day. Follow all directions on your prescription label and read all medication guides or instruction sheets. Take with food. You will need frequent medical tests. Use all HIV medications as directed. Do not change your dose or stop using a medicine without your doctor's advice. Skipping doses could make your virus resistant to medication. Remain under the care of a doctor. Store in the original container at room temperature, away from moisture and heat. Keep the bottle tightly closed when not in use. If you've had hepatitis B, it may come back or get worse after you stop using Genvoya. You may need liver function tests while using Genvoya and for several months after you stop.
Before taking this medicine Some drugs should not be used with Genvoya. Your treatment plan may change if you also use: alfuzosin; cisapride; oral midazolam, or triazolam; rifampin; sildenafil (Revatio, for treating pulmonary arterial hypertension); St. John's wort; antipsychotic medicine - lurasidone, pimozide; cholesterol medication - lomitapide, lovastatin, simvastatin; >ergot medicine - dihydroergotamine, ergotamine, methylergonovine; or seizure medicine - carbamazepine, phenobarbital, phenytoin. Genvoya is a complete combination treatment and should not be used with other antiviral medications, especially those that contain adefovir, cobicistat, elvitegravir, emtricitabine, lamivudine, ritonavir, or tenofovir: Atripla, Biktarvy, Cimduo, Combivir, Complera, Descovy, Epivir, Epzicom, Evotaz, Hepsera, Kaletra, Norvir, Odefsey, Prezcobix, Symfi, Symtuza, Technivie, Triumeq, Trizivir, Tybost, Viekira, and others.
Get emergency medical help if you have signs of an allergic reaction to Genvoya: hives; difficult breathing; swelling of your face, lips, tongue, or throat. Call your doctor at once if you have: kidney problems - swelling, urinating less, feeling tired or short of breath; lactic acidosis - unusual muscle pain, trouble breathing, stomach pain, vomiting, irregular heart rate, dizziness, feeling cold, or feeling very weak or tired; or liver problems - nausea, upper stomach pain, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes). Antiviral medicine can affect your immune system (even weeks or months after you've used Genvoya). Tell your doctor if you have: signs of a new infection - fever, night sweats, swollen glands, cold sores, cough, wheezing, diarrhea, weight loss; trouble speaking or swallowing, problems with balance or eye movement, weakness or prickly feeling; or swelling in your neck or throat (enlarged thyroid), menstrual changes, impotence. Common Genvoya side effects may include: nausea; or diarrhea. This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. Genvoya side effects (more detail)