Tamoxifen citrate increases the chance of having a stroke, which can cause serious medical problems, disability, or death. If you experience any symptoms of stroke, such as weakness, difficulty walking or talking, or numbness, contact your doctor immediately. It is important to bring them to your doctor's attention without delay as they can occasionally indicate the start of something more serious, and could include cancer of the uterus or other changes to the uterus. Tamoxifen citrate may cause cataracts or changes to parts of the eye known as the cornea or retina. Tamoxifen citrate can increase the chance of needing cataract surgery, and can cause blood clots in the veins of the eye.
Tamoxifen citrate can result in difficulty in distinguishing different colors.
If you experience any changes in your vision, tell your doctor immediately. If you are a woman receiving tamoxifen citrate for treatment of advanced breast cancer, and you experience excessive nausea, vomiting or thirst, tell your doctor immediately. Your doctor will evaluate this. This condition may occur shortly after starting tamoxifen citrate and may be associated with a good response to treatment. Many of these side effects happen only rarely.