For the ACSI Retail and Consumer Shipping Report 2020-2021, the researchers conducted interviews with 70,767 customers who were chosen at random and contacted via email between Jan. 13 and Dec. 27, 2020. Respondents were asked to evaluate their recent experiences with the largest retailers in the U.S., from department stores to supermarkets to gas stations to drug stores. The survey data was used to estimate customer satisfaction based on expectations, perceptions of quality, and perceptions of value, and then each chain was scored on a 100-point scale. For this ranking, Best Life pulled the stores from the “health and personal care” section of the report to determine the least reliable drug store in the U.S. Read on to find out what it is. RELATED: This Is the Least Popular Clothing Store in the U.S., According to Data. ACSI score (out of 100): 77 Maintaining an ACSI score of 77, the same rating it earned the year prior, CVS was the highest scoring drug store on this list. That said, plenty of customers have complaints about their experiences shopping at the chain. “My insurance requires me to get my prescriptions from CVS. I’m seriously considering getting different insurance because it’s always an ordeal,” a frustrated customer wrote on ConsumerAffairs. “I wait 30-60 minutes in an angry line while one tech moves at a glacial pace. I’ve tried repeatedly to get through to a pharmacist on the phone but had to give up after 45 minutes or more on hold. It’s always an exercise in frustration.” ACSI score (out of 100): 76 Kroger’s ACSI score dropped two points from the year prior. And while it still earned the second highest score on this list, not all customers are satisfied with their experience at the pharmacy. “I transferred my prescriptions to Kroger pharmacy after my pharmacy closed,” a verified reviewer recently wrote on ConsumerAffairs. “From the very first encounter with their staff, I found them rude, impatient, and condescending.” RELATED: This Is the Least Trusted Grocery Chain in the U.S., According to Data. ACSI score (out of 100): 74 It may be one of the most well-known names in the drug store chain industry, but Walgreens only scored a 74 on the most recent ACSI report, one point lower than it did the year prior. “I just had to switch to another pharmacy because my prescription wasn’t ready after I was told earlier that it was,” a frustrated verified reviewer wrote on ConsumerAffairs after learning their prescription medication wouldn’t be available for two months. “I’m not supposed to go one week without them, let alone two months. I find this unacceptable and it shows that the well-being of monthly customers [isn’t] being taken care of. Use at your own risk.” ACSI score (out of 100): 73 Shoppers turn to Walmart for just about everything, including health and beauty products and prescription medication. However, picking up the latter isn’t always the smoothest process, it seems. “My insurance only reimbursed specialty drugs through them, so I had to fill here for about two years. Every month you have to call in and speak to a rep who transfers you to a pharmacist who second guesses the doctor’s prescription,” one Walmart pharmacy customer wrote on ConsumerAffairs. “Sometimes you have to get your prescription resent because they do not keep good records of what happened in [the] months prior.” For more retail rankings sent straight to your inbox, sign up for our daily newsletter.  ACSI score (out of 100): 72ae0fcc31ae342fd3a1346ebb1f342fcb Albertsons tied for the lowest ACSI score of all the drug stores on this list. Among consumer complaints about the chain are the store’s high prices and inattentive staff. “I avoid this store whenever possible,” wrote one dissatisfied customer in a review on Sitejabber. “Checkers [talk] amongst themselves, [are] not the least bit interested in the long lines, and truly don’t care. Prices are about 30 percent higher than their competition. I can’t find half the items I need, but they are available elsewhere.” For more retail rankings sent straight to your inbox, sign up for our daily newsletter.  ACSI score (out of 100): 72 Rite Aid shares the honor of lowest ACSI score on this list with Albertsons. The two least trusted drug store chains also have certain problems in common, according to consumers—especially when it comes to their employees. “Staff is usually somewhat friendly but uninterested and unengaged,” a Rite Aid customer wrote on ConsumerAffairs. “They just don’t care. It’s best not to need anyone who works there unless it’s a question about where something is.” RELATED: This Is the Least Trusted Retailer in the U.S. Right Now, Data Shows.