NEW YORK (TheStreet) -- Shares of Eli Lilly  (LLY) were sliding in early-afternoon trading on Tuesday after Senator Bernie Sanders (I-VT) criticized the price increase of the company's Humalog insulin.

Why has the price of Humalog insulin gone up 700% in 20 years? It's simple. The drug industry's greed. pic.twitter.com/SUeSbsr2Ka

— Bernie Sanders (@SenSanders) November 1, 2016

The price of Humalog has surged to more than $250 per vial from $21 a vial over the past 20 years, according to the Washington Post. The treatment generated $640.8 million in third-quarter revenue for Eli Lilly.

Drug makers such as Eli Lilly have come under fire recently for drastically hiking the price of certain treatments. 

Separately, TheStreet Ratings team rates the stock as a "buy" with a ratings score of B+.

Eli Lilly's strengths such as its revenue growth and expanding profit margins outweigh the fact that the company has had lackluster performance in the stock itself.

You can view the full analysis from the report here: LLY

TheStreet Ratings objectively rated this stock according to its "risk-adjusted" total return prospect over a 12-month investment horizon. Not based on the news in any given day, the rating may differ from Jim Cramer's view or that of this article's author. 

More from Markets

European Automakers Gain on Reports China Mulling Auto Tariff Reduction

European Automakers Gain on Reports China Mulling Auto Tariff Reduction

Global Stocks Mixed, U.S. Futures Soften as Earnings, Oil, Rates Cloud Sentiment

Global Stocks Mixed, U.S. Futures Soften as Earnings, Oil, Rates Cloud Sentiment

Deutsche Bank Plans 'Significant' Job Cuts as Q1 Profits Slump

Deutsche Bank Plans 'Significant' Job Cuts as Q1 Profits Slump

Samsung Posts Record Q1 But Adds Cautious Voice To Smartphone Demand Forecasts

Samsung Posts Record Q1 But Adds Cautious Voice To Smartphone Demand Forecasts

Boeing Is Back to Cruising Altitude; GM Gets Assist From Amazon -- ICYMI

Boeing Is Back to Cruising Altitude; GM Gets Assist From Amazon -- ICYMI