Aidy Bryant's character on Shrill' discovers the Plan B pill is not as effective for women over a certain weight. "It's not on the FDA black box warning; that's why a lot of people don't know about it," Pollock says. "It's not on the package insert, not a lot of pharmacists know about it.."Dr. Pollock tells her patients about this. Though many doctors see the accessibility of the pill as a positive, many also acknowledge most women do not end up talking with a doctor before buying. "The more we educate our patients about it, the more they're going to understand how it works," she says.