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There are two main types of sinus infections or sinusitis: acute (short-term) sinusitis and chronic (long-term) sinusitis.1,2 Both acute and chronic sinusitis can be caused by a variety of different factors.1,2

Acute sinusitis:1

  • Symptoms last for 4 weeks or less
  • Is usually caused by a viral infection or bacterial infection.


If you get sinusitis often (more than 4 times a year), it’s known as recurrent acute sinusitis.1

Chronic sinusitis:

  • Symptoms last for more than 12 weeks2
  • May be caused by an obstruction in the sinuses that prevents mucus from clearing out properly, such as a deviated septum (where the wall between your nasal passages is displaced to one side)2,3
  • May be caused by medical issues such as nasal polyps (painless growths), which can also prevent mucus from clearing properly.2,4

Risk factors for sinus infections

If you’re prone to allergies like hay fever, or if you have a history of upper respiratory tract infections, you have a higher risk of getting an acute sinus infection.1

If you have a weak immune system or a history of allergies and/or asthma, you may be more vulnerable to chronic sinus infections.2 Smoking can also increase your risk of chronic sinusitis.2

The treatment for acute and chronic sinusitis will depend on what caused the infection, and how severe the symptoms are.1,2

Find out more about how to treat the symptoms of sinusitis.

  1. Acute sinusitis. BMJ Best Practice. August 19, 2021. Accessed September 20, 2021.
  2. Chronic sinusitis. BMJ Best Practice. August 4, 2020. Accessed September 20, 2021.
  3. Deviated septum - symptoms and causes. Mayo Clinic. Accessed September 23, 2021. symptoms-causes/syc-20351710.
  4. Nasal polyps: symptoms, causes, treatment & prevention. Cleveland Clinic. Accessed September 23, 2021.
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).

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