Doctor: Bernie Sanders in 'overall very good health'

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DES MOINES, Iowa -- Bernie Sanders is in "overall very good health," according to a letter from his doctor released by the Democratic presidential candidates' campaign Thursday.

The letter from Dr. Brian Monahan, who has been Sanders' physician for 26 years, says Sanders is active in his work and recreational life "without limitation."

Sanders had his last physical exam in November, according to the letter, when his blood pressure was 136/81 and he weighed 179 pounds. His thyroid profile, blood count, colonoscopy, and electrocardiogram were normal.

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Bernie Sanders and Hillary Clinton duking it out during Democratic debates
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Doctor: Bernie Sanders in 'overall very good health'
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt and Democratic presidential candidate, Hillary Clinton interrupt each other during the Univision, Washington Post Democratic presidential debate at Miami-Dade College, Wednesday, March 9, 2016, in Miami. (AP Photo/Wilfredo Lee)
Democratic presidential candidate, Hillary Clinton argues a point as Sen. Bernie Sanders, I-Vt., right, listens during a Democratic presidential primary debate at the University of Michigan-Flint, Sunday, March 6, 2016, in Flint, Mich. (AP Photo/Carlos Osorio)
Democratic presidential candidate, Hillary Clinton makes a point as Sen. Bernie Sanders, I-Vt, reatcs during a Democratic presidential primary debate at the University of Wisconsin-Milwaukee, Thursday, Feb. 11, 2016, in Milwaukee. (AP Photo/Morry Gash)
MILWAUKEE, WI - FEBRUARY 11: Democratic presidential candidate Senator Bernie Sanders (L) and Hillary Clinton participate in the PBS NewsHour Democratic presidential candidate debate at the University of Wisconsin-Milwaukee on February 11, 2016 in Milwaukee, Wisconsin.The debate is the final debate before the Nevada caucuses scheduled for February 20. (Photo by Win McNamee/Getty Images)
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., gestures towards Democratic presidential candidate, former Secretary of State Hillary Clinton during a democratic presidential primary debate at the Gaillard Center, Sunday, Jan. 17, 2016, in Charleston, S.C. (AP Photo/Mic Smith)
Democratic presidential candidate, Hillary Clinton, left, speaks at the NBC, YouTube Democratic presidential debate at the Gaillard Center, Sunday, Jan. 17, 2016, in Charleston, S.C. To the right is Democratic presidential candidate, Sen. Bernie Sanders, I-Vt. (AP Photo/Stephen B. Morton)
Democratic presidential candidate, Hillary Clinton and Democratic presidential candidate, Sen. Bernie Sanders, I-Vt. speak during a break at the NBC, YouTube Democratic presidential debate at the Gaillard Center, Sunday, Jan. 17, 2016, in Charleston, S.C. (AP Photo/Mic Smith)
DURHAM, NH - FEBRUARY 04: Democratic presidential candidates former Secretary of State Hillary Clinton and U.S. Sen. Bernie Sanders (I-VT) during their MSNBC Democratic Candidates Debate at the University of New Hampshire on February 4, 2016 in Durham, New Hampshire. This is the final debate for the Democratic candidates before the New Hampshire primaries. (Photo by Justin Sullivan/Getty Images)
Hillary Clinton, right, speaks to Bernie Sanders during a break at the Democratic presidential primary debate Saturday, Dec. 19, 2015, at Saint Anselm College in Manchester, N.H. (AP Photo/Jim Cole)
Bernie Sanders, left, offers an apology to Hillary Clinton during a Democratic presidential primary debate Saturday, Dec. 19, 2015, at Saint Anselm College in Manchester, N.H. (AP Photo/Jim Cole)
Bernie Sanders, left, speaks to Hillary Clinton after a Democratic presidential primary debate Saturday, Dec. 19, 2015, at Saint Anselm College in Manchester, N.H. (AP Photo/Jim Cole)
Bernie Sanders, left, makes a point as Hillary Rodham Clinton listens during a Democratic presidential primary debate, Saturday, Nov. 14, 2015, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Hillary Rodham Clinton, right, walks by Bernie Sanders during a commercial break at a Democratic presidential primary debate, Saturday, Nov. 14, 2015, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
FILE - In this Nov. 14, 2015, file photo, Bernie Sanders makes a point during a Democratic presidential primary debate in Des Moines, Iowa. The Democratic presidential candidates are meeting for their third debate on Dec. 19, with tensions suddenly boiling between Hillary Clinton and her chief rival, Sanders. (AP Photo/Charlie Neibergall, File)
Democratic presidential candidates Hillary Rodham Clinton, left, Bernie Sanders and Martin O'Malley appear before a Democratic presidential primary debate, Saturday, Nov. 14, 2015, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Hillary Rodham Clinton, right, and Sen. Bernie Sanders, of Vermont, speak during the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)
Democratic presidential candidates from left, former Virginia Sen. Jim Webb, Sen. Bernie Sanders, of Vermont, Hillary Rodham Clinton, former Maryland Gov. Martin O'Malley, and former Rhode Island Gov. Lincoln Chafee take the stage before the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)
LAS VEGAS, NV - OCTOBER 13: Democratic presidential candidates Sen. Bernie Sanders (I-VT) (L) and Hillary Clinton take part in a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate. (Photo by Joe Raedle/Getty Images)
Senator Bernie Sanders, an independent from Vermont, left, and Hillary Clinton, former U.S. secretary of state, participate in the first Democratic presidential debate at the Wynn Las Vegas resort and casino in Las Vegas, Nevada, U.S., on Tuesday, Oct. 13, 2015. While tonight's first Democratic presidential debate will probably lack the name-calling and sharp jabs of the Republican face-offs, there's still potential for strong disagreements between the party's leading contenders. Photographer: Josh Haner/Pool via Bloomberg
Sen. Bernie Sanders, of Vermont,, left, and Hillary Rodham Clinton laugh during the CNN Democratic presidential debate, Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)
LAS VEGAS, NV - OCTOBER 13: Democratic presidential candidates U.S. Sen. Bernie Sanders (I-VT) (L) and Hillary Clinton shake hands at the end of a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate. (Photo by Joe Raedle/Getty Images)
LAS VEGAS, NV - OCTOBER 13: Democratic presidential candidates U.S. Sen. Bernie Sanders (I-VT) (L) and Hillary Clinton take part in a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate. (Photo by Joe Raedle/Getty Images)
LAS VEGAS, NV - OCTOBER 13: Democratic presidential candidates U.S. Sen. Bernie Sanders (I-VT) (L) and Hillary Clinton take part in a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate. (Photo by Joe Raedle/Getty Images)
LAS VEGAS, NV - OCTOBER 13: (L-R) Democratic presidential candidates U.S. Sen. Bernie Sanders (I-VT), Hillary Clinton and Martin O'Malley take part in a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate. (Photo by Joe Raedle/Getty Images)
LAS VEGAS, NV - October 13: Bernie Sanders and Hillary Clinton pictured at the 2015 CNN Democratic Presidential Debate at Wynn Resort in Las Vegas, NV on October 13, 2015. Credit: Erik Kabik Photography/ MediaPunch/IPX
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The letter also says that over the years, he has been treated for gout, mild hypercholesterolemia, diverticulitis, hypothyroidism, laryngitis secondary to esophageal reflux, lumbar strain, and that he had superficial skin tumors removed. Sanders had hernia surgery last fall and had a cyst removed on his vocal cord, an experience he writes about in his 1997 autobiography. Both are mentioned in the letter.

He takes levothyroxine, a drug that supplement's hormones produced by the thyroid, and indomethacin, an anti-inflammatory, according to the document.

The letter also states he does not use tobacco and drinks alcohol "infrequently."

Sanders' campaign promised to release his medical records before the Iowa Caucuses, now just four days away, and the 74-year old candidate said his health was a fair issue to discuss. However, his campaign took issue when David Brock, who runs several pro-Hillary Clinton super PACs, considered plans to attack Sanders on his health.

Clinton, who is 68, has already released a similar medical record.

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