Fareston Side Effects
Treatment with Fareston may cause side effects in some people. Studies have shown that hot flushes, sweating, and nausea are some of the most commonly reported problems. Research has also shown that this prescription medicine can cause potentially serious complications, such as changes in vision, depression, and confusion, which should be reported to your healthcare provider right away.
As with any medicine, Fareston® (toremifene citrate) can cause side effects. However, not everyone who takes the medication will have problems. In fact, most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or are treated easily by you or your healthcare provider.
(This article covers many, but not all, of the possible side effects with Fareston. Your healthcare provider can discuss a more complete list with you.)
Fareston has been studied extensively in clinical trials. In these studies, the side effects that occurred in a group of people taking the drug were documented and then compared to those that occurred in a similar group of people taking a different breast cancer medication called tamoxifen (Nolvadex®, Soltamox®). As a result, it was possible to see what side effects occurred, how often they appeared, and how they compared with the other medicine.
In these studies, the most common Fareston side effects included:
- Hot flushes -- in up to 35 percent of women
- Sweating -- up to 20 percent
- Increases in certain liver enzymes (found using standard blood tests) -- up to 19 percent
- Nausea -- up to 14 percent
- Vaginal discharge -- up to 13 percent
- Cataracts -- up to 10 percent
- Dry eyes -- up to 9 percent
- Dizziness -- up to 9 percent
- Edema (swelling due to fluid retention) -- up to 5 percent
- Vomiting -- up to 4 percent
- Abnormal vision -- up to 4 percent
- Increase in blood calcium levels (hypercalcemia) -- up to 3 percent
- Vaginal bleeding -- up to 2 percent.