| Abdominal cramp | common | — | Abdominal cramp | Stomach cramps | — | Abdominal cramps or pain |
| Abdominal pain | — | stomach pain or swelling | stomach pain | — | Stomach pain | Abdominal cramps or pain |
| Allergic reaction | rare | hives | hives or welts, itching, rash | Itching, skin rash, or pale red bumps on the skin called hives | Serious allergic reaction | Allergic reaction |
| Bloating | — | — | bloating | — | — | Bloated abdomen |
| Bloody diarrhea | — | — | — | — | — | Bloody diarrhea |
| Bloody stools | — | bloody stools | blood in the stools | Blood in your poop or black poop | — | Bloody stool |
| Breathing problems | — | wheezing | trouble breathing | Breathing problems or wheezing | — | Trouble breathing |
| Cardiac arrest | — | — | cardiac arrest | — | — | — |
| Chest pain | — | — | chest pain or discomfort | — | — | Chest pain |
| Constipation | common | constipation | Constipation | Constipation | Constipation | Constipation |
| Confusion | — | confusion | — | — | — | — |
| Cough | — | — | cough | — | — | — |
| Death | — | — | death | — | — | — |
| Dehydration | — | — | — | dehydration | — | — |
| Dependence | — | — | — | — | — | Dependence |
| Difficulty breathing | — | difficulty breathing | trouble breathing | Breathing problems or wheezing | — | Trouble breathing |
| Difficulty swallowing | — | — | trouble swallowing | Trouble swallowing or throat tightness | — | — |
| Difficulty urinating | — | inability to urinate | decrease in urine volume | — | Urination difficulties | Urinary retention |
| Dizziness | common | dizziness | Dizziness | Dizziness | — | Dizziness |
| Drowsiness | — | drowsy | drowsiness | Drowsiness or tiredness | — | Drowsiness |
| Dry mouth | — | — | dryness of mouth | — | — | Dry mouth |
| Euphoria | — | — | — | — | — | Euphoria |
| Fainting | — | fainting | fainting | Dizziness, feeling lightheaded, or fainting | Fainting | Fainting |
| Fatigue | common | fatigue | tiredness | Drowsiness or tiredness | — | — |
| Fever | — | fever | fever | Fever or general ill feeling | — | — |
| Flatulence | common | — | Flatulence | — | Farting | — |
| Gas | — | — | — | — | — | Gas and indigestion |
| Headache | common | — | Headache | — | Headaches | — |
| Heart palpitations | — | — | palpitations | — | — | Heart palpitations |
| Heart problems | rare | — | — | heart problems | — | Heart problems |
| Hives | rare | hives | hives or welts, itching, rash | Itching, skin rash, or pale red bumps on the skin called hives | — | — |
| Hoarseness | — | — | hoarseness | — | — | — |
| Indigestion | — | — | indigestion | — | — | Gas and indigestion |
| Irregular heartbeat | — | irregular heartbeat | irregular or slow heartbeat | Racing heart | — | Irregular heartbeat |
| Itching | rare | itching | itching | Itching, skin rash, or pale red bumps on the skin called hives | — | — |
| Joint pain | — | — | joint or muscle pain | Joint pain | — | — |
| Lightheadedness | — | lightheadedness | — | Dizziness, feeling lightheaded, or fainting | — | Lightheadedness |
| Loss of appetite | — | — | loss of appetite | — | — | — |
| Nausea | common | nausea | nausea or vomiting | Nausea | Feeling sick (nausea) | Nausea |
| Necrotizing enterocolitis | — | — | — | — | — | Necrotizing enterocolitis |
| Pain | — | — | — | — | — | Pain |
| Palpitations | — | — | palpitations | — | — | Palpitations |
| Rash | uncommon | rash | Rash | Itching, skin rash, or pale red bumps on the skin called hives | — | — |
| Red skin lesions | — | red, peeling or blistering skin | red skin lesions, often with a purple center | — | — | — |
| Respiratory depression | — | — | — | — | — | Respiratory depression |
| Seizures | — | — | — | — | — | Seizures |
| Shortness of breath | — | shortness of breath | — | — | — | Shortness of breath |
| Skin peeling | — | red, peeling or blistering skin | blistering, peeling, loosening of skin | — | — | — |
| Sore throat | — | — | sore throat | — | — | — |
| Stomach cramps | common | — | — | Stomach cramps | — | Abdominal cramps or pain |
| Stomach discomfort | — | — | — | — | — | Stomach discomfort |
| Stomach pain | — | stomach pain or swelling | stomach pain | — | Stomach pain | — |
| Stomach upset | — | — | stomach upset | — | — | — |
| Swelling | — | — | swelling of hands, face, or mouth | Swelling of the face, lips, mouth, tongue, or throat | — | Swelling |
| Toxic megacolon | — | — | — | — | — | Toxic megacolon |
| Torsades de Pointes | — | — | Torsades de Pointes | — | — | — |
| Trouble breathing | — | wheezing | trouble breathing | Breathing problems or wheezing | — | Trouble breathing |
| Unconsciousness | — | unresponsiveness | unconsciousness | — | — | — |
| Unresponsiveness | — | unresponsiveness | — | — | — | — |
| Urinary retention | — | inability to urinate | decrease in urine volume | — | Urination difficulties | Urinary retention |
| Vomiting | — | nausea | nausea or vomiting | Nausea or vomiting | — | Nausea and vomiting |
| Weakness | — | — | unusual tiredness or weakness | — | — | Sudden weakness |
| Wheezing | — | wheezing | — | Breathing problems or wheezing | — | — |
| Withdrawal symptoms | — | — | — | — | — | Withdrawal symptoms |