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How to Read a Package Insert

August 2013

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Warnings and Precautions

This section discusses serious side effects that may occur in people who take this medicine. It is important that you pay attention to these warnings so you will recognize any symptoms that could suggest a serious problem.

If especially severe or life-threatening problems have been found, there may be a "Boxed Warning" on the first page of the package insert. As the name suggests, this information is clearly shown using capital letters surrounded by a black box so it will not be overlooked.

Before you start taking an HIV drug with Warnings that might affect you, your health care provider is likely to explain what the Warnings mean and tell you what you should watch for so that any problems can be caught early. Call your provider or pharmacist right away if you ever have a question or concern about a warning or symptoms you experience when taking the drug.

Adverse Reactions

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This section lists all the side effects that were reported in people who took this medicine while it was being tested. Side effects, also called adverse reactions, are effects that are different from what the drug was developed to do. These effects are usually grouped according to the body system affected (e.g., liver, skin, stomach), the group of people tested (e.g., adults, children), and perhaps also by how many people reported having each side effect.

These lists of "adverse events" can look frightening because they include so many problems, ranging from minor to life-threatening. The thing to remember is that this section lists everything that happened to hundreds or thousands of people (and sometimes also animals when the drug was in the early phases of testing) regardless of whether these events actually had any connection to the medicine. You may experience some of the side effects on the list or none at all. Even the effects listed as being most frequent do not affect everyone who takes the medicine.

Your health care provider probably will mention some of the side effects that you should watch for, but every person is different and it is impossible to tell in advance what you will experience. If you tend to have problems with one body system (such as your skin or stomach), you may be particularly interested in seeing how many people had problems in that area. Many side effects that are troublesome during the first days or weeks that you take the medicine may disappear later.

Drug Interactions

This section lists the effects that this medicine may have on other prescription or over-the-counter medicines you may be taking. This section also might warn that you should not take this medicine with a particular food or other product (such as an antacid).

It is a good idea to look through this section to see if it lists any medicines or other products that you use regularly. Be sure your health care provider knows about all the medications you are taking even if you only use them occasionally -- this includes over-the-counter drugs, prescription drugs, street drugs, supplements, and herbs.

Use in Specific Populations

This section tells what is known about the safety and effectiveness of the drug when used by certain groups. Specifically, it tells whether it is safe for use by nursing or pregnant mothers, children ("Pediatric Use"), and older people ("Geriatric Use"). Sometimes it may say that not enough information is available. This does not mean that it is unsafe in these groups of people, just that not enough research studies have been done.

Overdosage

This section describes what the results of taking too much of the medicine, or an overdose of the medicine are likely to be and how it should be treated. This kind of information is mainly useful to medical personnel. If you suspect an overdose of medication, you should contact a poison control center or emergency room right away.

Description

This section gives the chemical name of the drug and a diagram of its chemical make up. It tells whether it is in tablet form, capsules, liquid, or powder, and how it should be given -- by mouth or by injection. It also lists all inactive ingredients such as fillers, artificial colors, or flavorings. If you have food sensitivities, this is where you can check to see if there are ingredients that may cause you problems.

Clinical Pharmacology

This section tells how the medicine works in the body to fight HIV. It also tells whether studies in different groups of people found any differences in how it works for treatment-experienced patients (people who have taken HIV drugs before), treatment-naive patients (those who have never taken HIV drugs before), women, children, and elderly people.

While there is no specific section of the package insert dedicated solely to women, information pertaining to women (for example, indications for use in pregnant or breastfeeding women, dosing adjustments by weight, drug interactions with birth control pills or hormone replacement therapy) may be found in various sections throughout the package insert.

This section also describes how the drug is processed in and eliminated from your body. If you have a special problem like kidney or liver disease, this is one of the sections your health care provider will look at while deciding whether to prescribe this type of medicine for you, and if so, how much to give.

Nonclinical Toxicology

This section describes the cancer-causing tendencies of the drug as well as its abilities to cause cells to change, or mutate. This section may also include information on the drug's effect on fertility. Often, some or all of this information is based on animal studies or studies of human cells (not real people).

Clinical Studies

This section lists the results of studies or clinical trials that were done to show the drug's effectiveness in different groups of people. The results listed often compare the drug in question to another drug and show the difference in effectiveness between the two. The descriptions of the studies also include information on how long the study was conducted, how many people participated, and basic characteristics of study participants (e.g., age, race, prior use of HIV drugs).

References

This section is rarely included and refers the reader to other scientific sources of information.

How Supplied/Storage and Handling

This section lists all the available forms of this medicine, including tablets or capsules of various doses and perhaps liquids, and powder. Each one is described by color, shape, and markings, so you can be sure of which one you are taking. When reading the package insert for Fuzeon (an HIV drug which is injected into the body), this section will take about how to reconstitute, or mix, the powdered drug with sterile water.

This section also gives storage instructions. This is where you find out whether to keep the drug in the refrigerator or not. It also tells whether pills may be damaged from heat, light, or moisture. For example, there is usually a recommendation against leaving the medicine out in temperatures over 30ºC (86ºF). So, if you pick up your prescription from the pharmacy on a hot day, do not leave it in the car while you run other errands!

Patient Counseling Information

This section lists key information for health care providers to use in talking to patients about how to use the drug. Depending on the drug, this section can include information on correct dosing, likely side effects, and possible drug interactions. When you get a new medicine, this section can be a good one to read. It highlights the information your health care provider should talk over with you. If you have any questions about what is in this section, or you do not remember your provider telling you what is in this section, stop and ask your provider or pharmacist.


How Should I Use the Package Insert?

The package insert is a good source of information to use in addition to instructions your health care provider, nurse, or pharmacist may have given you. It is a good idea to review the package insert for any new medicine and to look at it again if anything about your health changes. If you have any questions after reading it, contact your provider or pharmacist for an explanation.

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This article was provided by The Well Project. Visit The Well Project's Web site to learn more about their resources and initiatives for women living with HIV. The Well Project shares its content with TheBody.com to ensure all people have access to the highest quality treatment information available. The Well Project receives no advertising revenue from TheBody.com or the advertisers on this site. No advertiser on this site has any editorial input into The Well Project's content.
 
See Also
HIV Medications: When to Start and What to Take -- A Guide From TheBody.com
More on HIV Medications

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