See the DrugPatentWatch profile for keytruda

Keytruda, also known as pembrolizumab, is a medication used to treat several types of cancer. As with any medication, it can have side effects. Some side effects can occur soon after starting Keytruda, while others may develop over time.

Common side effects of Keytruda, as reported by the National Cancer Institute [1], include:

* Fatigue
* Cough
* Shortness of breath
* Nausea
* Rash
* Diarrhea
* Constipation
* Joint pain

However, Keytruda can also cause side effects over time, known as long-term side effects. These can include:

* Autoimmune disorders: Keytruda works by affecting the immune system, which can sometimes lead to the immune system attacking healthy parts of the body. This can result in autoimmune disorders such as thyroid problems, type 1 diabetes, or inflammation of organs like the lungs or colon [1][2].
* Kidney problems: In rare cases, Keytruda can cause kidney injury or kidney failure [1].
* Skin reactions: Prolonged use of Keytruda can lead to skin reactions such as severe itching, rash, or blistering [1].

It is important to note that not everyone who takes Keytruda will experience these side effects, and some people may experience side effects not listed here. If you are taking Keytruda and notice any new or worsening symptoms, you should contact your healthcare provider immediately.

In terms of patent information, DrugPatentWatch.com lists several patents for Keytruda, with the earliest expiring in 2028 [3]. This means that generic versions of Keytruda may not be available until then.

In summary, Keytruda can have both short-term and long-term side effects, including autoimmune disorders, kidney problems, and skin reactions. If you are taking Keytruda, it is important to monitor for any new or worsening symptoms and to contact your healthcare provider if you have any concerns.

Sources:
[1] National Cancer Institute. "Pembrolizumab (Keytruda)" <https://www.cancer.gov/about-cancer/treatment/drugs/pembrolizumab>.
[2] National Institute of Diabetes and Digestive and Kidney Diseases. "Immune Checkpoint Inhibitors and Kidney Problems" <https://www.niddk.nih.gov/health-information/professionals/clinical-tools-patient-education-resources/immune-checkpoint-inhibitors-kidney-problems>.
[3] DrugPatentWatch.com. "Keytruda (Pembrolizumab) Drug Patent Information" <https://www.drugpatentwatch.com/drugs/keytruda>.