It looks like you are using an older version of Internet Explorer which is not supported. We advise that you update your browser to the latest version of Microsoft Edge, or consider using other browsers such as Chrome, Firefox or Safari.


Congestion is a feeling of "stuffiness", blockage or restricted airflow.1 It's often a symptom of illnesses that affect the upper respiratory tract, like the common cold or a sinus infection (sinusitis).1 These conditions usually make your body produce too much mucus, making your nose and sinuses feel clogged or blocked.2,3


The symptoms that come with nasal and/or sinus congestion depend on the underlying issue that’s causing it.4-6 All the conditions below can cause mucus build-up which leads to congestion, but each one has a different set of common symptoms:4-6



Find out more about colds and flu and mucus congestion:

Find out more about sinus infections and congestion:

Treating sinus and nasal congestion

When your nose and sinuses get plugged up with thick or sticky mucus, certain medications can help you. For example, mucolytics are medications that make the mucus thinner and less sticky, so it’s easier to blow out, leaving your nasal passages clear.8

Did you know? Clearing out the mucus can also prevent another infection from developing in your sinuses.9
  1. Meltzer EO, Caballero F, Fromer LM, et al. Treatment of congestion in upper respiratory diseases. Int J Gen Med. 2010;3:69-91.
  2. Medical definition of congestion. MedicineNet. Accessed August 4, 2021.
  3. Nasal congestion - definition. Mayo Clinic. Accessed August 4, 2021.
  4. Allergies or sinus infection: how to tell the difference. Healthline. 2018. Accessed August 4, 2021.
  5. Common cold - symptoms and causes. Mayo Clinic. Accessed June 14, 2021. causes/syc-20351605.
  6. Influenza (flu) - symptoms and causes. Mayo Clinic. Accessed June 14, 2021.
  7. Are sinus infections contagious? WebMD. Accessed September 21, 2021.
  8. Kryukov AI, Turovsky AB, Izotova GN, et al. Treatment of acute sinusitis. Russian Medical Journal. 2012;9:485-488.
  9. Knowles MR, Boucher RC. Mucus clearance as a primary innate defense mechanism for mammalian airways. J Clin Invest. 2002;109(5):571-577.
Sidebar References
  1. Sandoz SA (Pty) Ltd. ACC® 600 Professional information. V1.0 (02/11/2021), approved 26 October 2021 (oral powder) and 02 November 2021 (effervescent tablets).
  2. Sandoz SA (Pty) Ltd. ACC® 20 mg/ml ORAL SOLUTION Professional information. V1 (07/10/2021), approved 05 October 2021.
  3. Sandoz SA (Pty) Ltd. ACC® 200 Professional information. V10 (16/08/2022), approved 08 July 2020.

[S1] ACC® 20 mg/ml Oral Solution. Reg. No.: 48/10.3/0261. Composition: Each 1 ml of ACC 20 mg/ml ORAL SOLUTION contains 20 mg acetylcysteine. ATC Code: R05C B01.

[S1] ACC® 200 (effervescent tablets). Reg. No.: 29/10.2.2/0753. Composition: Each ACC 200 effervescent tablet contains: 200 mg acetylcysteine. Pharmacological Classification: A10.3 Medicines acting on the respiratory system – other.

[S1] ACC® 600 (effervescent tablets). Reg. No.: 45/10.3/0229. Composition: Each effervescent tablet contains 600 mg acetylcysteine. [S1] ACC® 600 ORAL POWDER. Reg. No.: 51/10.3/0816. Composition: Each sachet contains 600 mg of acetylcysteine. ATC Code: R05CB01.

For full prescribing information refer to the Sandoz Professional Information approved by the South African Health Products Regulatory Authority (SAHPRA).

Contact Us
Sandoz SA (Pty) Ltd, Reg. No. 1990/001979/07,
Magwa Crescent West,
Waterfall City,
Jukskei View,
Tel: +27 (11) 347 6600.
SANCAL Customer Call Centre: 0861 726 225.
Reporting of AEs: or [email protected]