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    Viagra warnings


    Viagra (sildenafil) doses must be low when the drug is used with HIV protease inhibitors (especially ritonavir), because these antiretrovirals reduce the metabolism of sildenafil in the liver, resulting in abnormally high blood levels which can cause adverse effects. The combination does not seem to affect blood levels of protease inhibitors. Sildenafil, used to treat erectile dysfunction, is supplied as tablets in three doses: 25, 50, and 100 mg, and is taken 1/2 an hour to 4 hours before intercourse. Doctors often start with 50 mg, then lower or raise the dose if needed. According to an April 21 "Backgrounder for HIV Treatment Advocates" from Pfizer Inc., "Given the magnitude of the interaction between sildenafil and protease inhibitors, ongoing discussions with the FDA indicate that a maximum single dose of 25 mg of sildenafil in a 48 hour period should not be exceeded in patients receiving these agents concurrently." There are other medications which require caution if used with sildenafil (and some which must not be combined at all). Patients should obtain this information from a medical professional, or from a recent copy of the official labeling of the drug. [Note: The current labeling, dated February 1999, is considerable less cautious than the Pfizer backgrounder quoted above. buy dapoxetine in india Consequently each individual patient should be assessed by a doctor before a decision is made to prescribe Viagra. The doctor will take into account current and past medical history including any medications being taken. Here we will take a look at the factors which may render Viagra unsuitable. The level at which you drink alcohol and whether or not you use recreational drugs can impede on your ability to obtain an erection. In order to minimise the potential health risks associated with alcohol consumption, the NHS advises that adults should not drink more than 14 units over the course of one week. It is also pertinent to mention that sustained alcohol misuse can permanently damage the arteries that supply blood to the penis. Drinking alcohol or taking drugs when using Viagra can reduce its efficacy.

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    Learn about Viagra Sildenafil Citrate may treat, uses, dosage, side effects, drug interactions, warnings, patient labeling, reviews, and related medications. what is kamagra oral jelly Read info on who should not take Viagra. Which health factors and medical conditions are contraindications. Which other drugs might conflict or interact with. Viagra Precautions and Warnings There are many precautions and warnings for Viagra to be aware of. For example, among the conditions you should let your healthcare provider know about before you take Viagra are leukemia, sickle cell anemia, high blood pressure, and liver disease or liver failure.

    This is not a list of all drugs or health problems that interact with Viagra (sildenafil tablets (erectile dysfunction)). Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Viagra (sildenafil tablets (erectile dysfunction)) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor. WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect: All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Viagra, the first medication produced to treat erectile dysfunction (ED) was approved in 1998. It quickly gained notoriety and is still the top selling prescription medication produced by the pharmaceutical giant Pfizer. In Viagra’s peak sales year of 2012, revenue from Viagra has been reported at over $2 billion with about 8 million prescriptions written. As many as 45 million men have used Viagra in its decade and a half lifespan. Viagra is the brand name of the generic medication sildenafil. It was first patented as a heart medication for angina but early clinical studies showed that it was not effective for that use. The studies also showed that it had a side effect – increased numbers of erections in men.

    Viagra warnings

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    Therefore, treatments for erectile dysfunction, including VIAGRA, should not be generally used in men for whom sexual activity is inadvisable because of their. do metformin cause weight loss Viagra Dosage and AdministrationDosage Forms and StrengthsContraindicationsWarnings and PrecautionsAdverse ReactionsDrug InteractionsUse in Specific PopulationsOverdosageViagra DescriptionViagra - Clinical PharmacologyNonclinical ToxicologyClinical StudiesHow Supplied/Storage and HandlingPatient Counseling InformationPatient Information When VIAGRA is co-administered with an alpha-blocker, patients should be stable on alpha-blocker therapy prior to initiating VIAGRA treatment and VIAGRA should be initiated at the lowest dose see DOSAGE AND ADMINISTRATION, WARNINGS AND PRECAUTIONS, CLINICAL PHARMACOLOGY.

     
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