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The Journal of the American Board of Family Medicine 19:566-578 (2006)
© 2006 American Board of Family Medicine

Original Research

Use of Herbal Remedies by Hispanic Patients: Do They Inform Their Physician?

Laura Howell, MD, Komal Kochhar, MBBS, MHA, Robert Saywell, Jr, PhD, MPH, Terrell Zollinger, DrPH, Julie Koehler, PharmD, Christina Mandzuk, BSE, Brittany Sutton, MPH, Javier Sevilla-Martir, MD and Deborah Allen, MD

Department of Family Medicine, Indiana University School of Medicine, Indianapolis, IN
Cincinnati Children’s Hospital, Cincinnati, OH
Butler University, Indianapolis, IN

Correspondence: Corresponding author: Robert M. Saywell, Jr., Department of Family Medicine, Indiana University School of Medicine, 1110 West Michigan Street, Long Hospital 247, Indianapolis, IN 46202-5102 (E-mail: rsaywell{at}iupui.edu)


   Abstract
Top
 Notes
 Abstract
Methods
 Results
 Discussion
 References
 
Purpose: This study measured the knowledge and use of herbs among Hispanics and assessed their experiences when discussing herb use with their physician.

Methods: Self-administered questionnaires were collected from 620 Hispanic patients seeking treatment in urban health centers.

Results: Most (80.3%) reported using herbs. Herb users were more comfortable speaking Spanish (91.9% vs 80.2%) and had been in the United States less than 5 years (47.0% vs 29.4%). More users considered herbs as drugs (60.5% vs 39.6%). Users were more aware that herbs could harm a baby if taken during pregnancy (56.4% vs 36.0%). The majority did not know the English name for 23 of the 25 herbs. A majority indicated their physician was unaware of their herb use. Few (17.4%) responded that their physicians asked about herb use. Only 41.6% thought their physician would understand their herb use, and 1.8% believed their physician would encourage continued use. There were no significant differences between herb users and nonusers in their perception of patient-physician communication levels.

Conclusion: Primary care physicians need to be aware that most Hispanic patients are likely to use herbs. It is important to initiate and encourage discussion of their patient’s interest in and use of these therapies.

The use of complementary and alternative medical therapies (CAM) has dramatically increased in the United States over the past 2 decades. The percentage of Americans using CAM increased from 33.8% to 42.1% from 1990 to 1997,1,2 and it is believed that the percentage has since increased. Most patients consider herbal remedies to be as safe and effective as patented medicines and continue to use various types of CAM.3

The sale of herbal medicines is growing by approximately 20% per year and is the largest growth area in retail pharmacy, far exceeding conventional medicine.4 Educated, young to middle-aged, non-black, and financially well-off women are more likely to use CAM.1–3,5–8 Of those regularly taking prescription medicines, nearly 20% concurrently take at least one herb, a high-dose multivitamin, or both.2,9 Patients generally report using CAM to augment their conventional medical care rather than as a result of their dissatisfaction with mainstream medicine.5,10

Herbal remedies are generally marketed in the United States as dietary supplements and are regulated as such under the 1994 Dietary Supplement Health and Education Act.9 In contrast to conventional drugs, herbal remedies do not undergo rigorous clinical trials and postapproval surveillance to define their effectiveness and relative safety. Consequently, clinical practitioners generally do not have available to them the scientific data needed to weigh the risks and benefits of herbal remedies as they do for conventional pharmaceutical medications.4 There is evidence to suggest that herbal remedies may contain ingredients that can worsen medical problems and interact with specific prescription medications.

Studies have estimated that the prevalence of herb use in the United States may be as high as one third1,2,5,6,11 and adverse reactions to herbs are probably under-recognized and under-reported.4,12 Oral use of herbs constitutes a greater potential for significant health risk than non-ingested treatment modalities because many herbs may be therapeutic at a low dose but toxic at higher doses. In addition, interactions between herbs and drugs may increase or decrease the pharmacological or toxicological effects of either component in addition to the synergistic therapeutic effects that may complicate the dosing of long-term medications.13

Effective physician-patient communication is vital to reduce the dangers of herb-drug interactions. Physicians with an open mind to CAM may be more likely to hear from their patients about their herb use as studies show that as many as one half to two thirds of patients do not tell their physicians about their use of herbs.1,3 Knowledge and mutual respect are the foundations of negotiating conflicts that arise from approaching an illness from 2 different belief and value systems.14 Recent literature suggests the importance of providing training in CAM to medical students and residents and encouraging them to communicate these issues with patients.4,8,15 One study shows that physicians’ exhibit better question-asking skills with non-Hispanic white patients, compared with Hispanic patients, and that patient ethnicity did not influence patient reported use or physician-patient communication about CAM.8 It was also observed that resident physicians with less clinical experience were more likely to ask patients one or more questions about their use of CAM.8

Even though herb use has increased over the past decade, the number of US pharmacy schools offering courses addressing their use has declined.15 According to one study, only 9 of 77 pharmacy colleges maintain pharmacognosy as a course in their curricula.15,16 As a result, today’s pharmacy school graduates may not be adequately equipped to respond to their patients’ request for information on herbs.15 Over one-half (52.0%) of the patients purchased their herbs in drugstores or groceries, where pharmacists would be available, but none of them received any herb information from the pharmacist.17 Another study found that more practicing pharmacists, compared with pharmacy students, felt that pharmacists should not become practitioners of CAM (26.6% vs 0.0%).18 This underscores the need for physicians to recognize an even greater responsibility to provide their patients with reliable information about herbs and to be particularly cognizant of the need to do so for their Hispanic population.

Given the potential for adverse reactions and interactions associated with herbs, it is important to identify the prevalence of herb use in specific populations and whether herb users routinely inform their primary care physician of such use. Several studies have indicated that the Hispanic population, as an ethnic group, exhibits high usage of CAM.7,19 One study revealed that Mexican-American women were 3 times more likely to use herbs than the general population.19 Another study in New Mexico showed that 77% of surveyed Hispanics used herbs, compared with 47% of non-Hispanic whites.7 Specific reasons why Hispanics may be more likely to use herbs are not clearly understood.

Ferguson and Candib20 concluded that minority patients, especially those not proficient in English, were less likely to establish rapport with physicians, less likely to receive sufficient medical information, and less likely to be encouraged to participate in medical decision making. Elder et al3 suggested that patients seek CAM because they cannot afford traditional medications. A distrust of physicians or physicians’ negative responses to herb use has also been identified as a reason Hispanic patients’ turn to herbs.5 Studies have also found that some patients believe that herb use, when combined with traditional therapy, may result in more optimal health outcomes.3

Numerous researchers14,17,21–28 have examined the unique cultural health beliefs of Hispanic patients, including the use of folk healing or herbs. However, few studies17,19,29,30 have actually surveyed Hispanic patients regarding their attitudes about herbs and their comfort level when discussing such remedies with their physicians. No studies have been conducted in Indiana, a Midwestern state with a rapidly growing Hispanic population. The goals of this study were to 1) assess Hispanic patients’ knowledge about herbs, 2) explore the underlying reasons why these patients may be more likely to use herbs than the general population, 3) examine patients’ comfort levels with discussing their herb use with their physicians, and 4) determine the extent to which physicians inquire about their patients’ herb use.


   Methods
Top
 Notes
 Abstract
 Methods
Results
 Discussion
 References
 
A patient survey was conducted between October 2003 and February 2004 at 5 urban health centers in Indianapolis, IN, that treat high numbers of Hispanic patients. The patients were approached in the waiting room of health clinics by bilingual research assistants. The research assistants identified the Hispanic patients visually by their ethnic appearance and asked each of them (if older than 18 years of age) to participate. At no time did the research assistants examine patients’ medical records or ask medical staff the ethnicity of patients. It is not known how many patients refused to participate. All self-identified Hispanic patients over the age of 18, who visited the study clinic sites during the data collection period were asked by bilingual research assistants to complete a survey as they waited to see their physician. The survey instrument included questions about the patient’s demographic information, familiarity with various specific herbs, attitudes toward and beliefs about herbs, and the patient’s comfort level when discussing herb use with their physician. The survey instrument was initially created in English, and then translated into Spanish by an individual with a medical background whose first language was Spanish. It was then given to another medically experienced individual fluent in Spanish who translated it into English to ensure concept equivalency. The Spanish version of the survey instrument was also examined by numerous members of the Indianapolis Hispanic community to ensure that questions were asked appropriately and with cultural sensitivity. Research assistants interviewed patients if they were unable to read the survey instrument. Survey completion was voluntary, no incentives were provided, and the subjects were assured that their responses would be kept confidential. The study received Indiana University Institutional Review Board approval in May 2003.

Completed questionnaires were scanned into an electronic data file, verified by a research assistant and analyzed using SPSS version 12.0.1. Descriptive statistics including mean, median, and frequency distribution were calculated. {chi}2 tests were performed to determine significant statistical differences. Values of P less than .05 were considered statistically significant.


   Results
Top
 Notes
 Abstract
 Methods
 Results
Discussion
 References
 
Demographic and Clinical Characteristics
A total of 620 Hispanic individuals completed the herb use questionnaire. The herbs used in the survey instrument were chosen by a consensus of numerous Hispanic individuals interviewed in the community as to what were the most common herbs used. Most often, the respondents were female (78.7%), unemployed (56.8%), uninsured (69.7%) and had lived in the United States for less than 5 years (43.9%). One half (58.9%) of the respondents were in their 20s, whereas approximately one tenth (12.2%) were over age 40. More than one half (53.0%) did not have a high school degree, and nearly one half (48.8%) lived with their spouse. More than one fourth (25.4%) had at least one child living in their household with a mean household size of 4.16. More than four fifths (89.2% and 89.9%, respectively) were most comfortable reading and speaking Spanish rather than English. Less than one third (29.8%) had not seen a physician in the past year, whereas more than one third (35.5%) had seen a physician at least 3 times in the past year. A majority (90.1%) had not seen a curandero or hierbero in the past year.

Use of Herbal Remedies
Four fifths (80.3%) responded that they were currently taking or had taken an oral herbal remedy in the past. Two thirds (59.6%) had taken between 6 and 15 different herbs during their lifetime. One third (30.7%) indicated they obtained their herbs from a Hispanic grocery store. Some indicated that herbs were most often used to treat cough (26.3%), stomach pain (24.9%), sore throat (20.3%), menstrual cramps (19.1%), headache (8.8%), and chest pain (7.2%).

Participants were asked about their use and knowledge of the English names for 25 commonly used herbs for treatment purposes (not as food seasonings) and whether their physicians were aware of their use, as shown in Table 1. More than half of the respondents reported that they had used at least 1 of 10 herbs among the 25 listed. The 10 most commonly used herbs were cinnamon, cloves, cumin, chamomile, garlic, onion, grass syrup, aloe vera, oregano, and lemon. The majority of respondents did not know the English name for 23 of the 25 herbs on the list. The 2 herbs for which the majority knew the English name were spider milkweed and bitter gourd. A vast majority of the respondents indicated that their doctors were unaware of their herb use.


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  		Table 1. Use and Physician Knowledge of My Herbal Use

 
Table 2 presents the demographic characteristics of the herb users and non-users. Of the 8 variables included in the analysis, only 2—language and duration of residence in the United States—were significantly different between the 2 groups. Herb users were more comfortable speaking Spanish than English (91.9% vs 80.2%) and more often lived in the United States for less than 5 years (47.0% vs 29.4%). The remaining 6 characteristics: gender, age, education level, employment status, health insurance coverage, and number of physician visits in the past year were not significantly different between the herb users and nonusers. Two multiple logistic regression models were developed to determine the extent to which demographic characteristics explain the use of herbal remedies and whether or not the individual informed their physician of their herb use. None of the findings were found to be statistically significant.


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  		Table 2. Demographic Characteristics of Herb Users and Nonusers

 
Knowledge and Use of Herbs
Table 3 shows that the overall knowledge about herbs was lacking among the participants. More than half of the respondents felt that herbs were drugs (58.2%) and that some herbs could harm a baby if taken during pregnancy (54.3%). Herb users were significantly more likely than nonusers to know that herbs are drugs (60.5% vs 39.6%) and that herbs could harm a baby if taken during pregnancy (56.4% vs 36.0%). One third believed that some herbs could interact with prescription medications (35.1%) and that herbs were not safe to use during pregnancy, compared with prescription or over-the-counter drugs (35.3%).


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  		Table 3. Knowledge/Behavior about Herbal Remedies

 
More than two thirds (66.0%) indicated that a family member recommended they take herbs. Four in 10 (44.0%) indicated they had given their children or grandchildren herbs. Herb users were significantly more likely than nonusers to reveal that a family member recommended that they take herbs (69.7% vs 39.7%) and that they provide herbs to their children or grandchildren (46.0% vs 23.1%).

Physician Communication and Perceived Attitudes
Approximately three fourths (72.7%) indicated that they were able to communicate easily with their doctors, as shown in Table 4. However, nearly three fourths (73.7%) of the respondents reported that their doctors did not ask them about their use of herbs, and a majority (90.2%) indicated that their doctor never recommended they take herbs. Majority felt their physician took time to listen to them at each appointment (83.8%); understood their cultural background (58.9%); and worked with them to improve their health (74.1%). More than two thirds (71.6%) indicated that if they went to a curandero for treatment, they would tell their doctor about it. Three fourths (77.6%) felt that "they can tell their doctor anything." There were no significant differences noted between the user and nonuser groups.


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  		Table 4. Physician Communication

 
When asked what they tell their doctors about their use of herbs, one sixth (15.0%) responded that "I would tell my doctor about all the remedies that I use." When asked what would happen if they told their doctors that they use herbs, only 4 in 10 (41.8%) indicated that their doctor would understand their herb use. More than one-quarter (25.9%) responded that their doctors would not know what the herb was used for and 20.5% thought that their doctor would tell them to stop using all herbs. One in 10 (10.5%) believed that their doctor would encourage them to continue using herbs; few (1.4%) thought their doctors would ridicule them for using herbs.

Some of the more commonly used herbs and their potential drug interactions are presented in Table 5.32–34


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  		Table 5. Examples of Selected Herb Use and Drug Interactions

 

   Discussion
Top
 Notes
 Abstract
 Methods
 Results
 Discussion
References
 
The majority of Hispanics who participated in the survey were herb users and it seems that their physicians were generally unaware of their herb use. The herb users tended to be more comfortable speaking Spanish rather than English and had been in the United States for less than 5 years indicating that they may have problems communicating with their physician and/or may not have a good understanding of the health care system in the United States. The fact that many did not know the English term for the herbs they use is further evidence of the existence of a barrier to achieving appropriate communications with their physician. Gordon14 found that newly arrived Hispanics who were primarily from rural areas were more likely to hold traditional beliefs and values, whereas US-born Hispanics were likely to have more assimilated attitudes, which may explain the higher rate of herb use in recent immigrants.

Elder et al3 pointed out that the main reason given for using herbs, alone or in combination with prescribed medications, was a belief that herbs would be effective. Many of those who communicated with their physician spoke of acceptance and control, but those who did not communicate with their physician mentioned traditional medicine’s limitations and the narrow-mindedness of their physicians.3 Patients who chose to reveal details about their herb use did so because they perceived their physician would be respectful, open-minded, and willing to listen to them.31 Patients found it easier to discuss their use of CAM when they believed that their physician expected them to be using herbs.31 On the other hand, patients who chose not to reveal their herb use with their physician gave several reasons for their decision, such as the impression that their physician would be disinterested in their herb use; the anticipation of a negative response; the conviction that their physician would be unwilling or unable to contribute useful information; and the impression that their physician perceives herbs to be irrelevant in the biomedical treatment course.31 In addition, patients may feel intimidated by their physicians and perceive a sense of disapproval with regard to their physician’s views on their use of CAM.35 Similar concerns were expressed by participants in this study. The majority of respondents noted that their physician would not know what the herbs were used for, and one fourth felt that their physician would ridicule them for using herbs.

Eisenberg et al1 noted that 70% of patients do not reveal their herb use to their allopathic practitioners. The current study indicated that for some herbs, this percentage may be much higher, as only 15% indicated that they would tell their doctor about all the herbs they use whereas three fourths replied that they could "tell their doctor anything." Providing herb use information to ones’ physician was not considered important to the patient; only one third of the respondents were aware that herbs could interact with prescription medication. Regardless of whether patients plan to inform their provider about herb use or not, the onus is on providers to ask the question of their patients.36

This study presents the findings of a survey and is subject to the limitations of self-reported data. Most of the survey items were value neutral. However, undoubtedly the respondents would want to appear to be knowledgeable and may have misstated their actual herb use. In addition, because this survey was administered in health care clinics, the responses to items relating to physician communication may have over-represented the level of communication between providers and patients.

Approximately one fourth of the participants who answered the first few pages of the survey did not complete the last part. There are at least 2 plausible reasons for the dropoff in response. The respondents may have tired of answering the questions and quit. Secondly, some questions in the last part dealt with their perspective of the physician’s attitude about herb use; thus, the respondents may not have wanted to answer these questions for fear that their responses may become known to their physician. Consequently, the proportion who felt that their physician will not support their herb use may actually be higher. Because this study surveyed a convenience sample of Hispanics, the responses of these subjects may not be representative of the general population of Hispanics in Indiana. Those who attend health clinics may be less likely to use herbs, thus the estimates of prevalence in this study may be conservative.

Primary care practitioners need to understand the extent and patterns of herbal use by their multiethnic patients and efforts to elicit information from patients about herbal use maybe warranted.37 It is important to initiate and encourage open, honest discussion about their patients’ interest in or use of herbs. Assessments should start with a thorough drug history, which should include inquiry into the use of dietary supplements including herbs. Pharmacists should strive to provide information routinely on the potential intrinsic effects and interactions of herbs with prescribed medications. Therefore, more continuing education programs and drug information resources about herbal medications must be made available to pharmacists as consumer use continues to escalate.38 In addition, therapy guidelines should be clearly defined as increased knowledge of these adverse factors can help design safer pharmacologic and herbal regimens for individual patients, thus minimizing adverse reactions and promoting good health. Lastly, physicians and consumers are encouraged to report suspected adverse effects of herbal products through the Food and Drug Administration Medwatch system (www.fda.gov or 1-800-FDA-1088)4,9 and available at http://www.cfsan.fda.gov/~dms/supplmnt.html.

It is an obligation of clinicians to elicit information on the use of herbs that may influence their patients’ health and to provide information on safe and effective treatment options. It is paramount for clinicians to be aware of known or potential herb–drug interactions to adequately treat their patients. Both physicians and consumers must become more educated about the safe and effective use of herbs. Asking patients about supplement use during an initial history should be made a central component of patient care and medication use monitoring.35


   Notes
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 Notes
Abstract
 Methods
 Results
 Discussion
 References
 
Funding: This study was funded in part by the Marion County Health Department (Indianapolis, IN).

This study was presented as a poster session at the 2005 American Public Health Association, Annual Meeting and Exposition, Philadelphia, PA, on December 10–14, 2005.

Conflict of interest: none declared.

Received for publication March 20, 2006. Revision received June 9, 2006. Accepted for publication June 12, 2006.


   References
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 Abstract
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 References
 

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