Dizziness & somnolence; nausea. Headache, trembling; confusion, mood changes (anxiety, nervousness, euphoria), sleep disorders; vomiting, constipation, dry mouth, diarrhoea, abdominal pain, dyspepsia, flatulence; sweating, pruritus. Tramadol: Postural hypotension, bradycardia, collapse. Paracetamol: Cutaneous hypersensitivity reactions eg, skin rashes, angioedema, SJS/TEN.