Diphenhydramine: Sedation, lassitude, dizziness, hypotension, muscular weakness, GI disturbances, headache, blurred vision, tinnitus, elation or depression, irritability, dry mouth, heaviness & weakness of hands. Ephedrine: Giddiness, sweating, thirst, tachycardia, precordial pain, palpitations, difficulty in micturition, tremors, anxiety, restlessness, insomnia.