Buscopan Side Effects

Many of the listed undesirable effects can be assigned to the anticholinergic properties of Hyoscine-N-butylbromide (Buscopan).
Anticholinergic side effects of Hyoscine-N-butylbromide (Buscopan) are generally mild and self-limited.
Tablet: Adverse events have been ranked under headings of frequency using the following convention: Very common ≥ 1/10); common ≥ 1/100 to < 1/10); uncommon ≥ 1/1000 to <1/100); rare ≥1/10000 to <1/1000); very rare (<1/10000); not known (cannot be estimated from the available data).
Immune system disorders: Not known*: anaphylactic shock, anaphylactic reactions, dyspnoea, and other hypersensitivity.
Cardiac disorders: Uncommon: tachycardia.
Skin and subcutaneous tissue disorders: Uncommon: skin reactions (e.g. urticaria, pruritus), abnormal sweating. Not known*: rash, erythema.
Renal and urinary disorders: Rare: urinary retention.
* This adverse reaction has been observed in post-marketing experience. With 95% certainty, the frequency category is not greater than uncommon (3/1,368) but might be lower. A precise frequency estimation is not possible as the adverse drug reaction did not occur in a clinical trial database of 1,368 patients.
Injection: Immune system disorders: Anaphylactic shock including fatal outcome, anaphylactic reactions, dyspnoea, skin reactions (e.g. urticaria, rash, erythema, pruritus) and other hypersensitivity.
Cardiac disorders: Tachycardia.
Gastrointestinal disorders: Dry mouth.
Skin and subcutaneous tissue disorders: Dyshidrosis.
Renal and urinary disorders: Urinary retention.
Eye disorders: Accommodation disorders, mydriasis, increased intraocular pressure.
Vascular disorders: Blood pressure decreased, dizziness, flushing.