Dryness in mouth, Dizziness, Nasopharyngitis (inflammation of the throat and nasal passages), Insomnia (difficulty in sleeping), Dry throat, Increased heart rate, Blurred vision, Glaucoma, Difficulty in urination, Urinary retention, Constipation, Upper respiratory tract infection, Sinus inflammation, Stomach discomfort, Fungal infection of oropharynx, Headache, Tremors, Palpitations, Cough, Voice change, Paresthesia (tingling or pricking sensation), Taste change