26 side effects
| Side effect | Frequency | NHS |
|---|---|---|
| Nausea | very common | Feeling sick (nausea) |
| Headache | — | Headaches, Constant headaches, long-lasting confusion or weakness, or frequent muscle cramps |
| Dry mouth | common | A dry mouth |
| Sweating | common | Sweating a lot |
| Insomnia | common | Being unable to sleep |
| Somnolence | common | Feeling sleepy |
| Fatigue | common | Feeling tired or weak |
| Weight changes | — | Losing or gaining weight without trying |
| Menstrual changes | — | Changes in periods, such as heavy bleeding, spotting or bleeding between periods |
| Confusion | — | High temperature, feeling agitated or confused, or trembling and twitching, Constant headaches, long-lasting confusion or weakness, or frequent muscle cramps |
| Muscle cramps | — | Constant headaches, long-lasting confusion or weakness, or frequent muscle cramps |
| Fever | — | High temperature, feeling agitated or confused, or trembling and twitching |
| Agitation | — | High temperature, feeling agitated or confused, or trembling and twitching |
| Tremors | — | High temperature, feeling agitated or confused, or trembling and twitching |
| Hemoptysis | — | Coughing up blood or blood in your pee |
| Hematuria | — | Coughing up blood or blood in your pee |
| Gastrointestinal bleeding | — | Black or red poo or blood in your vomit |
| Gingival bleeding | — | Bleeding from the gums, or bruises that appear without a reason or get bigger |
| Prolonged erection | — | Painful erections that last longer than 2 hours, Painful erections and problems getting an erection and ejaculating |
| Dizziness | — | Severe dizziness or passing out |
| Severe bleeding | — | Bleeding that's severe or you cannot stop |
| Suicidal thoughts | — | Thoughts about harming yourself or ending your life |
| Allergic reaction | rare | Symptoms of a serious allergic reaction |
| Erectile dysfunction | — | Painful erections and problems getting an erection and ejaculating |
| Vaginal bleeding | — | Vaginal bleeding and not reaching orgasm the same way as before |
| Decreased libido | — | Lower sex drive |
2 additional sourcesdidn't return structured side-effect data: Mayo Clinic, MedlinePlus.