Shares of

Dialysis Corp. of America

( DCAI) were among the best-performing health-related stocks Tuesday, rising 10% after the company posted solid second-quarter results.

The company, which manages freestanding kidney hemodialysis centers, earned $444,000, or 5 cents a share, on sales of $11.1 million. A year ago the company earned $388,000, or 4 cents a share, on sales of $9.6 million. For the first six months of the year, the company earned $769,000, or 8 cents a share, on sales of $21.8 million. Shares were recently trading up $1.70 to $18.85.

ViroPharma

(VPHM)

rose 26% after the company raised prices on its Vancocin capsules in the U.S. Wholesalers will now pay $242.10 for a 20-unit package of 125 milligram capsules, up from $195.76. A 20-unit package of 250 milligram capsules will increase to $446.32, up from $368.86. The price increase, which was not factored into the company's financial guidance issued on Aug. 2, is effective immediately. In response to the price increases, Piper Jaffray raised its price target on the stock to $18 from $16. Shares were trading up $2.86 to $13.85.

Shares of

Kosan Biosciences

( KOSN) fell 2% after the company terminated its 4.5 million share offering. The company said that it cancelled the stock sale "in light of the decline in its share price" after announcing that two of its anti-cancer agents would undergo protocol changes. On Monday, shares of Kosan fell 17% after the company said "amendments are being made in response to five patients that showed EKG changes without clinically significant consequences after infusion of 17-AAG." As part of the amended protocols, clinical investigators will obtain electrocardiograms prior to treatment with 17-AAG or DMAG, and after infusion in the initial cycle of therapy, the company said. Shares were recently trading down 16 cents to $7.19.

Lifeway Foods

(LWAY) - Get Report

fell 9% after the maker of kefir milk drinks posted second-quarter earnings. The company earned $556,845, or 7 cents a share, on sales of $5.1 million. A single analyst polled by Thomson First Call was expecting earnings of 7 cents a share. A year ago the company earned $432,109, or 5 cents a share, on sales of $4 million. Regarding the cost of milk, which is the company's largest cost-of-goods-sold component, the company said prices still remain at relatively high historical levels, but the price has flattened out and "looks to be fairly steady going forward." Shares were trading down $1.47 to $15.43.

Other health care volume movers included

Pfizer

(PFE) - Get Report

, down 7 cents to $26.13;

Eyetech Pharmaceuticals

( EYET), up 75 cents to $15.15;

Elan

(ELN)

, down 6 cents to $8.18;

Amgen

(AMGN) - Get Report

, down 22 cents to $80.37;

Merck

(MRK) - Get Report

, down 10 cents to $30.56;

Johnson & Johnson

(JNJ) - Get Report

, down 26 cents to $63.09; and

Schering-Plough

( SGP), down 19 cents to $21.55.