The most common side effects of Fybogel are wind (flatulence) and bloating. These effects usually occur because of the sudden increase in fibre in your diet and typically improve after a few days[1][3][5][7].
Other reported mild side effects include:
- Stomach-ache or stomach rumbles
- Feeling sick (nausea)
- Abdominal discomfort or distension
- Constipation or diarrhoea (less common)
Most people experience either no side effects or only minor ones[1][2][7].
Mild allergic reactions can occur, especially if you have had previous allergies or are regularly exposed to the powder (for example, if you are a carer or healthcare worker). Symptoms may include:
- Itchy eyes, nose, or skin
- Skin rash or redness
- Running nose
- Redness of the eye
If you experience any mild allergic reactions, stop taking Fybogel and consult your doctor or pharmacist[1][5][7].
Serious allergic reactions (anaphylaxis) are rare but require immediate medical attention. Warning signs include:
- Sudden swelling of lips, mouth, throat, or tongue
- Difficulty breathing, wheezing, or tightness in the chest/throat
- Skin turning blue, grey, or pale
- Severe confusion, drowsiness, or loss of consciousness
- Severe skin reactions: rash, blistering, or peeling skin
If you suspect a serious allergic reaction, call emergency services immediately[1][3][5].
Potential serious gastrointestinal effects can result if Fybogel is not taken with enough liquid, which can lead to:
- Bowel or oesophageal obstruction (blockage)
- Difficulty swallowing
- Chest pain or vomiting
To reduce this risk, always take Fybogel with plenty of water[5][6][8]. Seek immediate medical advice if you experience these symptoms.
Rarely, Fybogel can also cause:
- Blockage of the gut, especially in people with certain bowel conditions or if taken without adequate fluid
- Skin conditions such as rash and itching
- Intestinal or oesophageal blockage
Consult your doctor or pharmacist if symptoms persist or if you are concerned about any side effects[1][3][5].
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