Tiotropium Oral Inhalation

Tiotropium oral inhalation is a long-acting bronchodilator (airway opener) used daily to manage chronic breathing conditions. The supported uses are:

• Spiriva Respimat: long-term, once-daily maintenance treatment of bronchospasm (airway tightening) associated with COPD, including chronic bronchitis and emphysema, in adults
• Spiriva Respimat: reducing the frequency of COPD flare-ups (exacerbations) in adults
• Spiriva Respimat: long-term, once-daily maintenance treatment of asthma in patients 6 years of age and older
• Tiotropium oral inhalation is not indicated for relief of sudden (acute) bronchospasm in any of these conditions

Tiotropium works by blocking specific receptors in the smooth muscle lining the airways — specifically a type called M3 muscarinic receptors. When these receptors are blocked, the airway muscles relax and the airways widen, making it easier to breathe. This effect is long-lasting (more than 24 hours) and is largely local, meaning it acts mainly in the lungs rather than broadly throughout the body.

Because it is an anticholinergic agent, it can also affect other body systems that use the same receptors — which is why it can cause side effects like dry mouth or urinary difficulty in some people.

Spiriva Respimat is inhaled through the mouth using its dedicated inhaler device, once daily. The full dose requires two inhalations taken back-to-back — no more than one dose (two inhalations) in any 24-hour period. Food does not affect how tiotropium is absorbed, so timing around meals is not necessary.

• The inhaler must be primed before first use and re-primed if left unused for more than 3 days (one actuation) or more than 21 days (four actuations until cloud is visible)
• Maximum benefit in asthma may take up to 4 to 8 weeks of regular daily use
• No dose adjustment is required for older adults or people with liver problems, but patients with moderate to severe kidney disease should be watched closely
• Always follow your prescriber's instructions — do not adjust your dose on your own

The most commonly reported side effects with tiotropium oral inhalation include:

• Dry mouth
• Sore throat (pharyngitis)
• Cough
• Sinus congestion or sinusitis
• Headache (more common in asthma patients)
• Bronchitis
• Dizziness
• Urinary tract infection
• Palpitations (fluttering or pounding heartbeat)
• Constipation or acid reflux

More serious reactions that require prompt medical attention include sudden allergic reactions (swelling of the lips, tongue, or throat; hives; difficulty breathing), sudden airway tightening after using the inhaler, worsening eye pressure (narrow-angle glaucoma), and difficulty urinating.

• Not a rescue inhaler: Tiotropium opens airways slowly over time — it cannot treat a sudden breathing attack. Always have a fast-acting rescue inhaler (like albuterol) available.
• Allergic reactions: Serious and immediate hypersensitivity reactions — including angioedema (swelling of the mouth, tongue, or throat), hives, and anaphylaxis — have been reported. Stop use immediately and seek emergency care if these occur.
• Paradoxical bronchospasm: In rare cases, the inhaler can cause airways to tighten suddenly right after use. Use a rescue inhaler immediately and stop tiotropium.
• Eye pressure (narrow-angle glaucoma): Tiotropium may worsen this condition. Watch for eye pain, blurred vision, or colored halos and contact a doctor right away if they develop.
• Urinary retention: Tiotropium can make it harder to urinate, especially in people with an enlarged prostate or bladder obstruction. Report difficulty or pain urinating to your doctor immediately.
• Kidney disease: Since the drug is mainly cleared by the kidneys, patients with moderate to severe kidney disease should be monitored closely for anticholinergic side effects.

Tiotropium has a few notable interactions to be aware of:

• Other anticholinergic medications: Using tiotropium together with other anticholinergic drugs can increase side effects such as dry mouth, constipation, urinary problems, and eye pressure — avoid combining them
• Quinidine, ketoconazole, and gestodene: These drugs can inhibit the enzymes (CYP450 2D6 and 3A4) involved in breaking down a portion of tiotropium, which may affect how much of the drug stays in the body
• Tiotropium has been used safely alongside beta-agonist bronchodilators, inhaled steroids, antihistamines, methylxanthines, leukotriene modifiers, and other common respiratory medications without increased adverse effects

This is not a complete list of interactions. Always talk with your doctor or pharmacist before starting, stopping, or changing any medication.

• Do not use tiotropium if you are allergic to tiotropium, ipratropium, atropine, or any ingredient in the product — this is a contraindication
• Tell your doctor if you have narrow-angle glaucoma — tiotropium may worsen it
• Tell your doctor if you have an enlarged prostate (prostatic hyperplasia), bladder-neck obstruction, or any trouble urinating
• Tell your doctor if you have moderate to severe kidney disease — you will need closer monitoring
• If you are pregnant, tell your doctor — poorly controlled asthma in pregnancy increases risk to both mother and baby, so managing asthma safely is important
• If you are breastfeeding, discuss the risks and benefits with your doctor — it is not known whether tiotropium passes into human breast milk
• Spiriva Respimat for asthma is approved for children aged 6 and older; safety and effectiveness in children under 6 have not been established
• Tell your doctor if you have a severe allergy to milk proteins, as the inhalation powder formulation requires extra caution in that case
• Older adults may have reduced kidney clearance of the drug and should be monitored for anticholinergic effects

Taking too much tiotropium can lead to anticholinergic effects — symptoms like dry mouth, blurred vision, constipation, difficulty urinating, or changes in mental status. In one reported case, a patient who inhaled a very large amount over several days experienced altered mental status, tremors, abdominal pain, and severe constipation, and required hospitalization. If an overdose is suspected, stop using the medication and seek medical care right away.

Tiotropium works locally in the lungs to relax airway smooth muscle by blocking M3 muscarinic receptors, resulting in bronchodilation (airway widening) that lasts longer than 24 hours. In some studies using tiotropium inhalation powder, mild changes in the heart's QT interval (an electrical measurement of heart rhythm) were observed in some COPD patients, though other studies did not find this effect, and no patient developed dangerously prolonged QT readings. The bronchodilator effect is dose-dependent and predominantly site-specific — meaning it acts mainly where it is inhaled, in the airways.

After inhalation of Spiriva Respimat, peak tiotropium levels in the blood are reached within 5 to 7 minutes. About 33% of the inhaled dose reaches the bloodstream, while any swallowed portion is poorly absorbed (only 2–3%). The drug is mostly cleared unchanged through the kidneys, and its half-life (the time for half the drug to leave the body) is about 25 hours in COPD patients and about 44 hours in asthma patients after daily inhalation. Steady-state levels — where the drug reaches a stable daily level in the body — are achieved by about day 7 of regular use, with no further buildup after that.

Store at 20°C to 25°C (68° to 77°F); excursions permitted to 15°C to 30°C (59°F to 86°F) . store SPIRIVA capsules in the HANDIHALER device.