Overview In 1953, Bayer brought the first neuroleptic (
chlorpromazine) onto the German market. In the 1960s, Bayer introduced a pregnancy test,
Primodos, that consisted of two pills that contained
norethisterone (as acetate) and
ethinylestradiol. It detected pregnancy by inducing
menstruation in women who were not pregnant; the presence or absence of menstrual bleeding was then used to determine whether the user was pregnant. The test became the subject of controversy when it was blamed for
birth defects, and it was withdrawn from the market in the mid-1970s. Litigation in the 1980s ended inconclusively. A review of the matter by the
Medicines and Healthcare products Regulatory Agency in 2014 assessed the studies performed to date and found the evidence for adverse effects to be inconclusive. since 1978. In 1978, Bayer purchased
Miles Laboratories and its subsidiaries Miles Canada and
Cutter Laboratories, including product lines
Alka-Seltzer,
Flintstones Chewable Vitamins and
One-A-Day vitamins, as well as Cutter
insect repellent, and Cutter's
Factor VIII business. Factor VIII, a clotting agent used to treat
hemophilia, was produced, at the time, by processing donated blood. In the
early days of the AIDS epidemic, people with hemophilia were found to have higher rates of AIDS, and by 1983 the CDC had identified
contaminated blood products as a source of infection. According to the
New York Times, this was "one of the worst drug-related medical disasters in history". Companies, including Bayer, developed new ways to treat donated blood with heat to decontaminate it, and these new products were introduced early in 1984. In 1997, Bayer and the other three makers of such blood products agreed to pay $660 million to settle cases on behalf of more than 6,000 hemophiliacs infected in United States. But in 2003, documents emerged showing that Cutter had continued to sell unheated blood products in markets outside the US until 1985, including in Malaysia, Singapore, Indonesia, Japan and Argentina, to offload a product it was unable to sell in Europe and the US; it also continued manufacturing the unheated product for several months. Bayer said it did this because some countries were doubtful about the efficacy of the new product. Bayer has been involved in other controversies regarding its drug products. In the late 1990s it introduced a
statin drug, Baycol (
cerivastatin), but after 52 deaths were attributed to it, Bayer discontinued it in 2001. The side effect was
rhabdomyolysis, causing
kidney failure, which occurred with a tenfold greater frequency in patients treated with Baycol in comparison to those prescribed alternate medications of the statin class. Trasylol (
aprotinin), used to control bleeding during major surgery, was withdrawn from the market worldwide in 2007 when reports of increased mortality emerged; it was later re-introduced in Europe but not in the US.
Top-selling pharmaceutical products In 2014, pharmaceutical products contributed €12.05 billion of Bayer's €40.15 billion in gross revenue. In 2019, identified "key growth" products were Xarelto (
rivaroxaban), Eylea (
aflibercept), Stivarga (
regorafenib), Xofigo (
radium-223), and Adempas (riociguat). Top-selling products as of 2014 included: •
Kogenate (
recombinant clotting factor VIII). Kogenate is a recombinant version of clotting factor VIII, the absence or deficiency of which causes the abnormal bleeding associated with
haemophilia type A. Kogenate is one of several commercially available Factor VIII products having equivalent efficacy. •
Xarelto (
rivaroxaban) is a small molecule inhibitor of
Factor Xa, a key enzyme involved in
blood coagulation. In the United States, the FDA has approved rivaroxaban for the prevention of stroke in people with
atrial fibrillation, for the treatment of
deep vein thrombosis and
pulmonary embolism, and for the prevention of deep vein thrombosis in people undergoing hip surgery. Rivaroxaban competes with other newer generation anticoagulants such as
edoxaban,
apixaban, and
dabigatran as well as with the generic anticoagulant warfarin. It has similar efficacy to warfarin and is associated with a lower risk of intracranial bleeding, but unlike warfarin there is no established protocol for rapidly reversing its effects in the event of uncontrolled bleeding or the need for emergency surgery. •
Betaseron (
interferon beta-1b) is an injectable form of the protein
interferon beta used to prevent relapses in the relapsing remitting form of
multiple sclerosis. Betaseron competes with other injectable forms of interferon beta,
glatiramer acetate, and a variety of newer multiple sclerosis drugs, some of which can be taken orally (
Dimethyl fumarate,
teriflunomide, others). •
Yasmin / Yaz birth control pills are part of a group of birth control pill products based on the
progestin drospirenone. Yaz is approved in the United States for the prevention of pregnancy, to treat symptoms of premenstrual dysphoric disorder in women who choose an oral contraceptive for contraception, and to treat moderate acne in women at least 14 years of age who choose an oral contraceptive for contraception. The FDA conducted a safety review regarding the potential of Yaz and other drospirenone-containing products to increase the risk of blood clots; Yaz and Yasmin were associated with the deaths of 23 women in Canada, leading
Health Canada to issue a warning in 2011. Although conflicting results were obtained in different studies, the FDA added a warning to the label in 2012 that Yaz and related products may be associated with an increased risk of clotting relative to other birth control pill products. Subsequently, a meta analysis suggested that birth control pills of the class Yasmin belongs to raise the risk of blood clots to a greater extent than some other classes of birth control pills. •
Nexavar (
sorafenib) is a kinase inhibitor used in the treatment of liver cancer (
hepatocellular carcinoma), kidney cancer (
renal cell carcinoma), and certain types of
thyroid cancer. •
Trasylol (
Aprotinin) Trasylol is a trypsin inhibitor used to control bleeding during major surgery. In a 2006 meeting called by the FDA to review the drug's safety, Bayer scientists failed to reveal the results of an ongoing large study suggesting that Trasylol may increase the risks of death and stroke. According to a FDA official who preferred to remain anonymous, the FDA learned of the study only through information provided to the FDA by a whistleblowing scientist who was involved in it. The study concluded Trasylol carried greater risks of death, serious kidney damage, congestive heart failure and strokes. On 15 December of the same year, the FDA restricted the use of Trasylol, and in November 2007, they requested that the company suspend marketing. In 2011, Health Canada lifted its suspension of Trasylol for its originally approved indication of limiting bleeding in coronary bypass surgery, citing flaws in the design of the studies that led to its suspension. This decision was controversial. In 2013, the European Medicines Agency lifted its suspension of the Trasylol marketing authorization for selected patients undergoing cardiac bypass surgery, citing a favorable risk-benefit ratio. •
Cipro (
ciprofloxacin) Ciprofloxacin was approved by the
US Food and Drug Administration (FDA) in 1987. Ciprofloxacin is the most widely used of the second-generation quinolone antibiotics that came into clinical use in the late 1980s and early 1990s. In 2010, over 20 million outpatient prescriptions were written for ciprofloxacin, making it the 35th-most commonly prescribed drug, and the 5th-most commonly prescribed antibacterial, in the US. •
Rennie antacid tablets, one of the biggest selling branded over-the-counter medications sold in Great Britain, with sales of £29.8 million.
Agricultural Bayer produces various fungicides, herbicides, insecticides, and some crop varieties. •
Fungicides are primarily marketed for
cereal crops, fresh produce, fungal with bacteria-based pesticides, and control of
mildew and
rust diseases.
Nativo products are a mixture of trifloxystrobin
tebuconazole.
XPro products are a mix of
bixafen and
prothioconazole, while
Luna contains
fluopyram and
pyrimethanil. •
Herbicides are marketed primarily for field crops and orchards.
Liberty brands containing
glufosinate ( Liberty or Basta) are used for general weed control.
Capreno containing a mixture of
thiencarbazone-methyl and
tembotrione is used for grass and broad-leaf control. •
Insecticides are marketed according to specific crop and insect pest type. Foliar insecticides include
Belt containing flubendiamide, which is marketed against
Lepidopteran pests, and
Movento containing
spirotetramat, which is marketed against
sucking insects.
Neonicotinoids such as
clothianidin and
imidacloprid are used as systemic seed treatments products such as Poncho and Gaucho. In 2008, neonicotinoids came under increasing scrutiny over their environmental impacts starting in Germany. Neonicotinoid use has been linked in a range of studies to adverse ecological effects, including
honey-bee colony collapse disorder (CCD) and loss of birds due to a reduction in insect populations. In 2013, the European Union and a few non EU countries restricted the use of certain neonicotinoids.
Parathion was discovered by scientists at IG Farben in the 1940s as a
cholinesterase inhibitor insecticide.
Propoxur is a
carbamate insecticide that was introduced by Bayer in 1959. ==Acquisitions==