What is a common side effect of oral contraceptive pills?

Oral contraceptive pills (OCPs) can commonly cause nausea, which is often attributed to the hormonal changes these medications introduce into the body. The combination of estrogen and progestin in many OCPs can lead to gastrointestinal disturbances, especially when a new regimen is started. This side effect is typically dose-dependent and may become less pronounced after the initial months of use as the body adjusts to the hormones.

While other side effects like weight gain, skin rashes, and hair loss can happen, they are less commonly associated with OCPs compared to nausea. Weight gain is often a controversial side effect discussed in relation to OCPs, with some users reporting weight changes, but comprehensive studies have shown that the effect is not as directly linked to OCPs as nausea is. Skin rashes can occur in some users, but they are typically not a widespread reaction. Hair loss can also occur, although it is rare and often related to different hormonal factors.

Thus, nausea stands out as a common and expected side effect among users of oral contraceptive pills, particularly during the early stages of use.