PC-SPESBanned Substance

• The adulterants are the whole story here. In February 2002 the California Department of Health Services found warfarin — a prescription blood thinner — in PC-SPES capsules [1][2][4].
  
  BotanicLab voluntarily recalled the product nationwide the same month [2][4]. ^[4]

• Warfarin was not the first finding. In August 2001 an independent lab, Rocky Mountain Instrumental Laboratory, found the synthetic estrogen diethylstilbestrol (DES) in 3 of 6 tested lots from two sources [4].
  
  A third drug, the anti-inflammatory indomethacin, was measured in lots made between 1996 and mid-1999 [4]. ^[4]

• The companion product SPES, marketed for immune support, was separately found to contain the prescription anti-anxiety drug alprazolam (Xanax) [1][2]. ^[1]

• Why these particular drugs mattered so much: men were taking PC-SPES for its estrogen-like effect on PSA and testosterone [4].
  
  The hidden DES delivered exactly that — an unlicensed hormone drug at an unpredictable dose [4]. The hidden warfarin added uncontrolled bleeding risk on top [4]. ^[4]

• One disagreement in the record was never resolved. BotanicLab's own submitted sample tested negative for DES in August 2001 [4].
  
  The independent lab, testing separately-sourced lots from the same period, found DES in half of them [4][9]. ^[4]

• The broader point is not specific to this one product. A botanical blend's ingredient list describes what the maker says went in, not what an analytical lab finds in the capsule [4].
  
  PC-SPES is the case where that gap was measured drug by drug, across years of production [4]. ^[4]

• The two causes could never be separated. PC-SPES's adverse effects came from the herbs' own estrogen-like activity, the hidden prescription adulterants, or both [3][4].
  
  Sources flag this explicitly as unresolved, not as a settled attribution [3][4]. ^[4]

• Because the dominant effect mimicked estrogen therapy, the common side effects mirrored it [4].
  
  Nipple tenderness was reported in 34.8% to 100% of patients across studies, and gynecomastia (breast enlargement) in 8% to 8.7% [4]. ^[4]

• Gastrointestinal and circulatory effects were common too [4].
  
  Diarrhea in 13% to 38.6% of patients, dyspepsia or nausea in 15.7% to 21.7%, and leg cramps or swelling in 2% to 68.5% [4]. ^[4]

• Blood clots are the serious signal. Thromboembolic events were reported in 5% to 6.2% of patients across studies [4].
  
  Case reports document pulmonary embolism, deep vein thrombosis, disseminated intravascular coagulation and abdominal-cavity hemorrhage [1][3][4]. ^[4]

• A 1998 study in the New England Journal of Medicine is stark on this [5].
  
  All 8 of 8 prostate cancer patients taking PC-SPES had breast tenderness and loss of libido, and one developed a superficial venous thrombosis [5]. ^[5]

• Two published case reports go further [3].
  
  One describes an acquired bleeding disorder (coagulopathy) in a patient taking PC-SPES, discussed as possibly contamination-related [3]. A separate one describes disseminated intravascular coagulation associated with its use [3]. ^[3]

• 1996 — PC-SPES goes on sale in the US, over the counter, with no prescription needed [3]. ^[3]

• 1997 — the herbal formula is patented in the United States [4]. ^[4]

• 2001 — allegations of DES contamination begin circulating among prostate cancer patients online [4]. ^[4]

• August 2001 — an independent lab tests 6 lots from 2 sources and finds DES in 3 of them [4].
  
  BotanicLab's own submitted sample from the same period tests negative [4]. ^[4]

• February 28, 2002 — California's health department finds warfarin in PC-SPES and alprazolam in SPES [1][2][4].
  
  BotanicLab voluntarily recalls both products nationwide [1][2][4]. ^[4]

• March 2002 — the FDA issues an additional public warning after the manufacturer's recall [8]. ^[8]

• May 1, 2002 — the FDA's Enforcement Report classifies the recall Class I, its most serious category: a reasonable probability of serious adverse health consequences or death [8]. ^[8]

• June 2002 — BotanicLab shuts down its operations entirely [9].
  
  A class action lawsuit is filed alleging it sold mislabeled dietary supplements [9]. ^[9]

• Today — PC-SPES is not legally available in the United States, because the only company licensed by the patent holder to make it is no longer in business [4][6][7]. ^[4]

No source reviewed establishes a human lethal dose or a toxic threshold specific to PC-SPES [4].

What is documented is contamination levels. Indomethacin measured 1.07 to 13.19 mg/g in lots made from 1996 through mid-1999, and DES 107.28 to 159.27 µg/g in the same lots [4].

Those early lots were 2 to 6 times more antineoplastic and up to 50 times more estrogenic in laboratory testing than lots made after spring 1999, tracking their higher drug content [4].

Serious harm followed ordinary daily use rather than a single overdose. One documented retroperitoneal hemorrhage occurred in a 62-year-old man after about one month of unsupervised use [1]. ^[4]

There is no PC-SPES-specific poison-control protocol, and no established safe or dangerous exposure threshold for accidental ingestion [7][10].

NCI's patient guidance is general: tell every healthcare provider about any dietary supplement, herb, vitamin, mineral or home remedy being taken [7].

In the published bleeding-disorder and DIC case reports, management centred on identifying PC-SPES as the cause, stopping it, and correcting the coagulation abnormality [3].

US Poison Control (National Capital Poison Center) offers free, confidential triage at 1-800-222-1222 or triage.webpoisoncontrol.org [10]. Call 911 immediately if the person collapses, has a seizure, has trouble breathing, or cannot be woken [10]. ^[10]