Omfattende og akutte allergiske reaktioner med blodtryksfald og/ eller åndedrætsbesvær (anafylaktiske reaktioner), vrangforestillinger, ophidselse, nedsat fysisk styrke, depression, angst, konfusion, seksuelle forstyrrelser, abstinenssymptomer, koordinationsforstyrrelser, epileptiske anfald (inklusive kloniske og tonisk- kloniske krampeanfald), nedsat synsstyrke, svækket åndedræt (respirationsdepression), respirationsstop (apnø), smertefuld oppustethed, tarmforstoppelse, smerter i urinblæren, nedsat vandladning (nedsat urinudskillelse).
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).