The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
- Weight gain (25%)
- Sleepiness (21%)
- Dry mouth (13%)
- More appetite (11%)
Less Common Side Effects
- Having low energy
- Sleepiness
- Dizziness
- Headache
- Nausea
- Constipation
- Trouble staying still
Lybalvi serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Seizures
- Neuroleptic malignant syndrome: fever, sweating, stiff muscles, confusion, not aware of your surroundings, fast or irregular heartbeat
- Difficulty swallowing: Choking when eating
- Uncontrolled muscle movements (tardive dyskinesia): involuntarily sticking out your tongue, puffing out your cheeks, puckering your mouth, lip smacking, chewing, and foot tapping
- Dangerously high blood sugar: frequently thirsty, needing to urinate often, tiredness, nausea, vomiting, difficulty breathing, having fruity breath, having dry mouth
- Serious infections: fever, headache, chills, body aches, cough, weakness
- Serious allergic and skin reactions: hives, blisters, skin reddening or peeling, swelling of the lips or tongue, difficulty breathing
Source: DailyMed
The following Lybalvi side effects have also been reported
Side effects that you should report to your care team as soon as possible:
- Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
- High blood sugar (hyperglycemia)—increased thirst or amount of urine, unusual weakness or fatigue, blurry vision
- High fever, stiff muscles, increased sweating, fast or irregular heartbeat, and confusion, which may be signs of neuroleptic malignant syndrome
- High prolactin level—unexpected breast tissue growth, discharge from the nipple, change in sex drive or performance, irregular menstrual cycle
- Infection—fever, chills, cough, or sore throat
- Low blood pressure—dizziness, feeling faint or lightheaded, blurry vision
- Pain or trouble swallowing
- Rash, fever, and swollen lymph nodes
- Seizures
- Stroke—sudden numbness or weakness of the face, arm, or leg, trouble speaking, confusion, trouble walking, loss of balance or coordination, dizziness, severe headache, change in vision
- Trouble passing urine
- Uncontrolled and repetitive body movements, muscle stiffness or spasms, tremors or shaking, loss of balance or coordination, restlessness, shuffling walk, which may be signs of extrapyramidal symptoms (EPS)
Side effects that usually do not require medical attention (report these to your care team if they continue or are bothersome):
- Constipation
- Dizziness
- Drowsiness
- Dry mouth
- Headache
- Upset stomach
- Weight gain

