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
- Sleepiness
- Difficulty concentrating
- Feeling tired
- Lightheadedness
- Dizziness
- Headache
- Dry mouth
- Nausea
- Vomiting
- Constipation
- Sweating
- Fast heart rate
- Anxiety
- Restlessness
- Nervousness
- Tremor
- Irritability
Less Common Side Effects
- Weakness
- Injuries from accidental falls
- Raised body temperature
- Confusion
- Difficulty sleeping
- Rash
- Diarrhea
- Stomach pain
- Sensitivity to light
- Blurry vision
- Muscle pain
- Backache
Promethazine Vc With Codeine serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Accidentally taking too much (overdose): not responding to sound or touch, slowed breathing, extreme sleepiness, slow heartbeat, upper right-sided stomach pain, dark urine, cold or clammy skin, yellowing of your skin or eyes
- Opioid withdrawal: anxiety, suicidal thoughts, restlessness, runny nose, yawning, sweating, chills, wide pupils, irritability
- Dangerously slow breathing: trouble breathing; bluish-colored lips, fingers, or toes
- Neuroleptic malignant syndrome (NMS): fever, sweating, stiff muscles, confusion, not aware of your surroundings, fast or irregular heartbeat
Source: DailyMed
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