What are the Side Effects of Clenil?

Clenil modulite, also known generically as beclomethasone, is used to treat asthma. As with most medications, Clenil can cause some users to experience mild to severe side effects.


Clenil is a prescription drug used to prevent asthma attacks. However, once a severe asthma attack occurs, Clenil will not be able to successfully treat the attack. This medication is classified as a corticosteriod. It is widely available both as an inhalant and as an aerosol solution. It works by reducing inflammation and swelling of the patient's airway passages.

Serious Side Effects

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According to Drugs.com, people using Clenil may experience serious side effects, including nausea, loss of appetite, worsening asthma, weight loss, difficulty breathing, severe skin rash and irritation, numbness, bruising and muscle weakness. Report the occurrence of any of these side effects to your doctor immediately. Note that serious side effects can increase if you alter the recommended dose.

Less Serious Side Effects

Less serious, more common side effects include headache, congestion, dry mouth and throat, mouth sores, sinus pressure, sore throat, cough, deepened voice, and dry nose. Though these side effects are less serious than others, always contact your doctor if they become persistent or worsen in severity; increasingly severe side effects may signal a greater medical problem.

Drug Interactions

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Clenil may interact with a number of medications. Always consult a full list of interactions before using Clenil. Drugs that can interact with Clenil include Mifeprex, amoxicillin, Biaxin (clarithromycin), erythromycin, miconazole, Vaprisol and Telzir (fosamprenavir). Severe side effects can arise as a result of interactions with these drugs. Discuss your past and present use of medications with your doctor.


Always take Clenil exactly as prescribed to avoid the increased occurrence of side effects. Clenil may cause harm to a fetus, so discuss with your doctor the dangers of using Clenil while pregnant. Do not administer the drug to children under 5 years of age. The long-term use of steroids may lead to osteoporosis.