Tiotropium 18 mcg

Category- Allopathy

Medicine Highlights

Tiotropium Uses

Tiotropium 18 mcg is a respule solution belonging to the category of histamine antagonists and is used for the management of COPD, emphysema and bronchitis

Tiotropium side effects 

More Common  

1. Body aches or pain 
2. Chills 
3. Constipation 
4. Cough 
5. Decrease in the frequency of urination 
6. Decrease in urine volume 
7. Difficulty in passing urine (dribbling) 
8. Difficulty with breathing 
9. Ear congestion 
10. Feeling of warmth 
11. Fever 
12. Headache 
13. Loss of voice 
14. Painful urination 
15. Redness of the face, neck, arms, and occasionally, upper chest 
16. Runny or stuffy nose 
17. Sneezing 
18. Sore throat 
19. Unusual tiredness or weakness 

Less Common 

1. Chest pain or tightness 
2. Confusion 
3. Dizziness 
4. Dry heaves 
5. Dry mouth 
6. Fainting 
7. Increase in heart rate 
8. Lightheadedness 
9. Pain or tenderness around the eyes and cheekbones 
10. Rapid breathing 
11. Stomach pain or discomfort 
12. Stuffy nose 
13. Sunken eyes 
14. Thirst 
15. Trouble breathing 
16. Vomiting 
17. Wrinkled skin 

How Tiotropium works 

Tiotropium respules work by blocking acetylcholine, a chemical that tightens airway muscles and increases mucus. This action relaxes the airways and reduces mucus, making breathing easier. In short, it keeps the lungs more open and less sticky so air flows better.

Safety Measures and Warning 

Pregnancy

Tiotropium use in pregnancy is generally avoided due to the limited evidence related to safety in pregnancy. Always consult a doctor before using it.

Breastfeeding

Tiotropium enters breast milk in small amounts, and it is safe for use in breastfeeding, but caution is advised, and it should be used only if clearly needed under a doctor’s recommendation.

Tiotropium Interaction with Food Product 

Avoid consuming alcohol and smoking simultaneously, as it may affect the drug’s action and show an effect on the brain, leading to severe drowsiness, sedation, and coma in severe cases.

Tiotropium Interaction with Other Medicines  

Avoid taking Tiotropium 18 mcg with the following medicines, as it may increase or decrease the desired effect, or in worse cases, it could be fatal:

Tiotropium Chemical Structure

IUPAC (International Union of Pure and Applied Chemistry)/ Chemical name

[(1R,2R,4S,5S)-9,9-dimethyl-3-oxa-9-azoniatricyclo [3.3.1.02,4] nonan-7-yl] 2-hydroxy-2,2-dithiophen-2-ylacetate; bromide hydrate

Intake routine/cycle

Daily dose

Take Tiotropium exactly as your doctor recommends. The dose may change based on your condition and how well you respond. Do not take more than prescribed without consulting your doctor.

Missed Dose

If you forget to take your medicine, take the medication as soon as you remember. If it’s nearly time for your next dose, skip the missed one and continue with your regular schedule. Always consult the doctor before making any changes to your dosage.

Overdose

It is not recommended to use more than 18 mcg of tiotropium per day, as it may cause severe overdosing effects like dry mouth, stomach upset, and irritation. Immediately seek medical attention and meet the doctor if necessary.

Storage

1. Store the medicine at room temperature. 
2. Keep away from sunlight and moisture. 
3. Keep out of reach of children. 

Directions for use 

1. Take Tiotropium exactly as prescribed by your doctor, at the same time each day. 
2. Do not stop taking Tiotropium without your doctor’s approval, even if you feel better. 
3. If you forget to take Tiotropium, take it as soon as you remember. If it’s almost time for your next dose, skip the missed dose. 

Tiotropium Summary 

The tiotropium 9 mcg inhaler is an anticholinergic bronchodilator medicine used mainly for COPD (chronic obstructive pulmonary disease), emphysema, and bronchitis. The drug works by blocking acetylcholine receptors, which decreases secretions and opens the airways. Common side effects include dry mouth, constipation, blurred vision, dizziness, and difficulty urinating. Food does not interfere with its action, but taking the medication along with alcohol and sedatives can worsen side effects. People with glaucoma, urinary retention, severe stomach or bowel blockage, or heat intolerance should avoid tiotropium. Taking more than 18 mcg of this medication can cause overdosing effects like severe dry mouth, confusion, blurred vision, hot flushed skin, muscle weakness, seizures, or breathing problems and requires emergency care.

FAQ’s

What are the uses of tiotropium inhalers?

Tiotropium inhalers are primarily used in the management of chronic obstructive pulmonary disease (COPD). They work as long-acting bronchodilators, relaxing airway muscles to reduce narrowing, ease symptoms like coughing, wheezing, and breathlessness, and improve long-term lung function when taken regularly.

What are the side effects of tiotropium?

Tiotropium can cause side effects such as dry mouth, constipation, blurred vision, urinary retention, and drowsiness. Some people may also experience headaches, dizziness, or upper respiratory tract infections, while rare but serious effects include bowel obstruction or difficulty urinating, which require medical attention.

What is the drug class of tiotropium?

Tiotropium belongs to the anticholinergic (antimuscarinic) drug class and is used to treat chronic obstructive pulmonary disease.

What are tiotropium interactions with other drugs?

Tiotropium interacts with many drugs, especially other anticholinergics, antihistamines, tricyclic antidepressants, and antipsychotics. These combinations can intensify side effects like dry mouth, constipation, blurred vision, or urinary retention. Over 200 interactions are documented, with some major ones requiring strict medical supervision.

Reference 

1. Drugs.com. Tiotropium inhalation: Uses, Side Effects & Warnings [Internet]. Cerner Multum; 2025 Aug 4 [cited 2026 Feb 28]. Available from. 
2. Farghaly S, Johnston B. Tiotropium (Spiriva): Uses, Side Effects, Interactions, Pictures, Warnings & Dosing [Internet]. WebMD; 2024 Aug 14 [cited 2026 Feb 28]. Available from. 
3. Merative, Micromedex®. Tiotropium (inhalation route): Side effects & dosage [Internet]. Mayo Clinic; 2026 Jan 31 [cited 2026 Feb 28]. Available from. 
4. Tashkin DP, Celli B, Senn S, Burkhart D, Kesten S, Menjoge S, et al. A 4-year trial of tiotropium in chronic obstructive pulmonary disease. N Engl J Med [Internet]. 2008 Oct 9 [cited 2026 Feb 28]; 359(15):1543–5 4. Available from. 
5. PubChem [Internet]. Bethesda (MD): National Library of Medicine (US), National Center for Biotechnology Information; 2004-. PubChem Compound Summary for CID 11431811, Tiotropium Bromide Monohydrate; [cited 2026 Feb. 28]. Available from. 

Siva Krishna Adithya Bhumireddy

Siva Krishna Adithya Bhumireddy completed a Bachelor of Pharmacy from GIET School of Pharmacy, affiliated with Andhra University, and from his 3rd year of graduation, he was working as a freelance medical and publication writer. Having expertise in systematic reviews and clinical research. With his keen interest and skills in research and documentation practices, he also reviewed more than 150 manuscripts from international journals like Elsevier, Springer Nature, and Sage Journals, and all the manuscripts were indexed and appeared in PubMed, Scopus, and Web of Science databases, and he received honorary recognition letters and certificates from all of them. Siva Krishna Adithya also published a few systematic, narrative reviews and a few chapters of international expertise.