These maximum strength capsules get to the root cause of congested sinuses by relieving sinus pressure, pain and tension effectively. Capsules with phenylephrine hydrochloride, caffeine and paracetamol, help relieve the symptoms of pain and congestion caused by sinusitis, which include stuffy nose, blocked sinuses, headache, fever, aches and pains. The capsules can also relieve tiredness and drowsiness.