Generalised acute allergic reactions with a fall in the blood pressure and/ or difficulty in breathing (anaphylactic reactions), delusional ideas, states of excitement, loss of physical strength, depression, anxiety, confusion, sexual dysfunction, withdrawal symptoms, coordination disturbances, seizures (including clonic and grand mal seizures), diminished visual acuity, impaired respiration (respiratory depression), respiratory arrest (apnoea), painful bloating, block of the digestion channel, urinary bladder pain, passing water less than normal (reduced urine excretion).