| Side Effect | Description |
| Breast tenderness and enlargement | Progesterone therapy, including Utrogestan, can cause breast tenderness, soreness, and enlargement due to its effects on breast tissue development. |
| Mood changes | Some individuals may experience mood swings, irritability, or changes in emotional well-being while taking Utrogestan therapy. |
| Fatigue | Fatigue or feelings of lethargy may occur as a side effect of Utrogestan therapy. |
| Headaches | Headaches are a common side effect of progesterone therapy, including Utrogestan use. These headaches may range from mild to moderate in severity. |
| Nausea | Nausea or gastrointestinal discomfort may occur as a side effect of Utrogestan therapy, though this is usually mild and transient. |
| Changes in libido | Some individuals may experience changes in libido (sex drive) while taking Utrogestan therapy. |
| Fluid retention | Progesterone therapy can lead to fluid retention, causing swelling or bloating in the hands, feet, or other parts of the body. |
| Weight changes | Some individuals may experience changes in body weight or distribution as a side effect of Utrogestan therapy. |
| Skin changes | Progesterone therapy may cause changes in skin texture, including increased softness or oiliness, as well as changes in pigmentation. |
| Menstrual-like bleeding | Some individuals may experience breakthrough bleeding or spotting while taking Utrogestan therapy, particularly if they have not undergone surgical removal of the gonads. |
| Sleep disturbances | Progesterone therapy may affect sleep patterns in some individuals, leading to insomnia or disrupted sleep. |
| Rare allergic reactions | Although rare, some individuals may experience allergic reactions to Utrogestan, including rash, itching, swelling, or difficulty breathing. Immediate medical attention is necessary if any signs of an allergic reaction occur. |