The grades of 4 Pharmaceuticals stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

This week, Heska Corporation (HSKA) pushes up from a B to a A rating. Heska Corporation discovers, develops, manufactures, and markets companion animal health products, primarily for dogs, cats, and horses. The company also gets A’s in sales growth, operating margin growth, and earnings growth. For more information, get Portfolio Grader’s complete analysis of HSKA stock.

Pfizer Inc. (PFE) is seeing ratings go up from a C last week to a B this week. Pfizer Inc. is a research-based, global pharmaceutical company that discovers, develops, manufactures, and markets medicines for humans and animals. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of PFE stock.

This is a strong week for Juniper Pharmaceuticals, Inc. (JNP). The company’s rating climbs to B from the previous week’s C. For more information, get Portfolio Grader’s complete analysis of JNP stock.

AcelRx Pharmaceuticals, Inc. (ACRX) gets a higher grade this week, advancing from a C last week to a B. AcelRx Pharmaceuticals, Inc. focuses on the development and commercialization of therapies for the treatment of acute and breakthrough pain. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of ACRX stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.