--- title: Buy Theo-24 Sr (Theophylline) 200mg Pills Online description: Theo-24 Sr (Theophylline) is a sustained-release bronchodilator for respiratory conditions. Order 200mg pills from our verified online pharmacy. type: product language: en url: https://liabilis.com/order-theo-24-sr-online-en.html availability: in_stock shipping: - type: Standard Airmail price: 10.00 currency: USD area: Worldwide time: 14-21 days - type: Tracked Express price: 30.00 currency: USD area: Worldwide tracking: true time: 5-9 days price_min: 45.9 price_max: 536.74 currency: USD offers: - name: 200mg x 30 pills price: 45.9 - name: 200mg x 60 pills price: 73.44 - name: 200mg x 90 pills price: 99.36 - name: 200mg x 120 pills price: 232.99 - name: 200mg x 180 pills price: 314.99 - name: 200mg x 360 pills price: 536.74 --- # Buy Theo-24 Sr (Theophylline) 200mg Pills Online Theo-24 Sr, containing the active ingredient Theophylline, is a sustained-release bronchodilator medication. It helps treat asthma, chronic bronchitis, and emphysema by relaxing the muscles around bronchial tubes and improving breathing. This sustained-release formulation provides consistent medication levels throughout the day. Our online pharmacy provides reliable access to generic Theo-24 Sr in 200mg sustained-release pills. ## Pricing and Options | Dosage | Pack Size | Price (USD) | Price Per Pill | Status | | :--- | :--- | :--- | :--- | :--- | | **200mg** | 30 pills | **$45.9** | $1.53 | In Stock | | **200mg** | 60 pills | **$73.44** | $1.224 | In Stock | | **200mg** | 90 pills | **$99.36** | $1.104 | In Stock | | **200mg** | 120 pills | **$232.99** | $1.94 | In Stock | | **200mg** | 180 pills | **$314.99** | $1.75 | In Stock | | **200mg** | 360 pills | **$536.74** | $1.49 | In Stock | [Buy Now](https://liabilis.com/order-theo-24-sr-online-en.html) ## Introduction Theo-24 Sr is a generic oral medication that contains the bronchodilator theophylline. Available as a 200 mg pill, it belongs to the class of methylxanthine derivatives and is used to improve airway function in chronic respiratory disorders. The drug works by relaxing airway smooth muscle and enhancing the responsiveness of the respiratory centre to carbon dioxide. Primary therapeutic applications include maintenance treatment of asthma and chronic obstructive pulmonary disease (COPD). Secondary uses may involve adjunct therapy for certain types of nocturnal asthma, although these are not formally approved. ## Quick Reference Facts **Active Ingredient** : Theophylline **Form** : pill 200 mg **Primary Uses** : • Maintenance therapy for asthma • Long-term management of COPD ## What is Theo-24 Sr? Theo-24 Sr is the generic version of medications containing the active compound theophylline. Theophylline has been employed for several decades as a bronchodilator and respiratory stimulant. As a generic product, Theo-24 Sr provides the same pharmacological profile as branded theophylline formulations, such as Theo-Dur and Theophylline EC, while offering a lower-cost alternative. The medication is manufactured by licensed pharmaceutical facilities that comply with international Good Manufacturing Practice (GMP) standards, although specific manufacturer details are not disclosed in publicly available sources. ## How Theo-24 Sr Works Theophylline exerts its therapeutic effect through multiple mechanisms: - **Phosphodiesterase inhibition** - By blocking phosphodiesterase-4, intracellular cyclic AMP levels rise, leading to relaxation of airway smooth muscle and reduced bronchoconstriction. - **Adenosine receptor antagonism** - The drug competitively inhibits adenosine receptors (A1 and A2), diminishing bronchial hyper-responsiveness and preventing reflex bronchoconstriction. - **Respiratory centre stimulation** - Theophylline increases the sensitivity of the medullary respiratory centre to carbon dioxide, improving ventilatory drive, especially in patients with chronic hypoventilation. Onset of action typically occurs within 30 minutes after oral ingestion, with peak plasma concentrations reached in 1-2 hours. The elimination half-life ranges from 6 to 12 hours, depending on age, smoking status, and hepatic function, which influences dosing frequency. Metabolism occurs primarily via hepatic cytochrome P450 enzymes (CYP1A2), making drug-drug interactions an important consideration. ## Conditions Treated with Theo-24 Sr - **Asthma (maintenance therapy)** Theophylline improves airway patency and reduces the frequency of mild-to-moderate asthma attacks, complementing inhaled corticosteroids and β₂-agonists. - **Chronic Obstructive Pulmonary Disease (COPD)** In COPD, the drug provides long-acting bronchodilation, helping to alleviate dyspnea and improve exercise tolerance when used alongside standard inhaler therapy. - **Bronchial hyper-responsiveness** By dampening airway reactivity, theophylline can lessen episodic bronchospasm triggered by irritants or allergens. ## Is Theo-24 Sr the Right Medication for You? Theo-24 Sr is suitable for adult patients who require long-term bronchodilation and have demonstrated insufficient control with inhaled therapies alone. Ideal candidates include individuals with persistent asthma or moderate-to-severe COPD who are non-smokers or have reduced smoking exposure, as smoking accelerates theophylline clearance. Contraindications encompass uncontrolled cardiac arrhythmias, severe hypertension, active peptic ulcer disease, and known hypersensitivity to methylxanthines. Caution is advised in the elderly, patients with hepatic impairment, and pregnant or lactating women, where dosing adjustments or alternative treatments may be preferable. ## Buying Theo-24 Sr from [our online pharmacy](https://liabilis.com/order-theo-24-sr-online-en.html) ### Why Choose Our Service? Our platform offers a reliable way to obtain theophylline when local pharmacies face stock shortages or when brand-name equivalents are substantially more expensive. By sourcing Theo-24 Sr through a verified network, patients can achieve significant cost savings without compromising therapeutic quality. ### Quality & Safety Assurance We partner with licensed international pharmacies to ensure quality and authenticity. Each shipment is inspected for compliance with regulatory standards, and all products are accompanied by a certificate of analysis confirming potency and purity. ### Pricing & Access Because Theo-24 Sr is a generic formulation, its price is typically close to the manufacturer’s production cost, providing a cheaper alternative to branded theophylline products. This makes long-term therapy more affordable, especially for patients without insurance coverage. ### Discreet Delivery Orders are packaged in plain, unmarked envelopes and dispatched via secure carriers. Express delivery usually arrives within seven days, while standard airmail takes roughly three weeks, ensuring privacy and convenience. ## Use: Dosing, Missed Dose, Overdose - **Standard dosing** - The usual adult dose of Theo-24 Sr is 200 mg taken orally once daily, adjusted based on serum theophylline levels, renal function, and concomitant medications. - **Missed dose** - If a dose is forgotten and it is less than 12 hours until the next scheduled dose, take the missed tablet as soon as remembered. If it is closer to the next dose, skip the missed tablet and resume the regular schedule; do not double-dose. - **Overdose** - Suspected overdose requires immediate medical attention. Symptoms may include nausea, vomiting, cardiac arrhythmias, seizures, or severe tremors. Contact emergency services or a poison-control center promptly. - **Administration tips** - Theo-24 Sr may be taken with or without food; however, a high-fat meal can delay absorption slightly. Avoid excessive caffeine or alcohol, as they increase the risk of toxicity. Patients should not operate heavy machinery until they know how the medication affects them. ## Safety Information ### ⚠️ Who Should Not Take Theo-24 Sr - Individuals with known hypersensitivity to theophylline or other methylxanthines. - Patients with uncontrolled cardiac arrhythmias, severe hypertension, or recent myocardial infarction. - Those with active peptic ulcer disease or severe hepatic impairment. - Pregnant or breastfeeding women unless a specialist advises otherwise. ### Common Side Effects - Nausea, vomiting, and abdominal discomfort (mild, often transient). - Headache and insomnia (related to central nervous system stimulation). - Mild tremor or palpitations; dose adjustment usually resolves these symptoms. ### Serious Side Effects (Seek Immediate Medical Help) - Cardiac arrhythmias such as atrial fibrillation or ventricular tachycardia. - Persistent vomiting leading to dehydration. - Seizures or severe neurological disturbance. - Signs of hypersensitivity: rash, itching, swelling, or difficulty breathing. ### Drug & Food Interactions - **CYP1A2 inhibitors** (e.g., fluoroquinolone antibiotics, cimetidine, zileuton) can raise serum theophylline levels, increasing toxicity risk. - **CYP1A2 inducers** (e.g., smoking, rifampin, carbamazepine) may reduce effectiveness, requiring dose escalation. - **Caffeine** synergizes with theophylline, potentially precipitating tachycardia or insomnia. - **Beta-blockers** may blunt the bronchodilatory effect, necessitating careful monitoring. ## Off-Label and Investigational Uses of Theo-24 Sr - **Nocturnal asthma** - Clinical studies have shown that nighttime theophylline dosing can reduce nocturnal bronchospasm and improve sleep quality. - **Apnea of prematurity** - Theophylline is sometimes employed to stimulate the respiratory centre in premature infants, although this indication is not approved for adult formulations. - **Pre-operative bronchodilation** - Some anesthesiologists use low-dose theophylline to decrease airway reactivity during surgery. All off-label applications should be undertaken only under direct supervision of a qualified healthcare professional, as safety and efficacy are not formally established by regulatory agencies. ## Storage & Handling - Store Theo-24 Sr tablets at 20-25 °C (68-77 °F) in a dry place, protected from light and moisture. - Keep the container tightly closed and out of reach of children. - Do not use tablets beyond the expiration date printed on the packaging. - Dispose of unused medication according to local hazardous waste guidelines or return to a pharmacy take-back program. ## Frequently Asked Questions **Practical Use & Lifestyle** - **Can I travel internationally with Theo-24 Sr?** Yes, the medication can be carried in personal luggage for personal use. Keep it in its original container and carry a copy of the prescription or a physician’s note if required by customs authorities. - **Will grapefruit juice affect my Theo-24 Sr dose?** Grapefruit inhibits CYP1A2 enzymes, potentially raising theophylline levels and increasing the risk of side effects. It is advisable to avoid large quantities of grapefruit while taking this medication. - **Is it safe to drink alcohol while on Theo-24 Sr?** Alcohol can enhance theophylline’s central nervous system stimulation and may increase the likelihood of nausea or dizziness. Moderate consumption is generally tolerated, but patients should monitor their response. **Product & Formulation Details** - **What do Theo-24 Sr tablets look like?** The 200 mg tablets are round, white to off-white, and bear the imprint “TH24” on one side. Appearance may vary slightly between manufacturing batches. - **Can I split a Theo-24 Sr tablet?** The tablet is not scored, and splitting it may result in uneven dosing. If a lower dose is required, the prescribing clinician should select an appropriate strength. **Regulatory & Safety Nuances** - **Will Theo-24 Sr appear on a standard drug test?** Theophylline is not typically screened for in routine occupational drug tests, but specialized testing can detect it if specifically requested. - **Is Theo-24 Sr safe for older adults?** Elderly patients may have reduced clearance, leading to higher serum concentrations. Dose adjustments and regular monitoring are recommended for this population. - **Can athletes use Theo-24 Sr without violating anti-doping rules?** Theophylline is listed on the World Anti-Doping Agency (WADA) prohibited list when present in urine above a certain threshold. Athletes should consult their sport’s governing body before use. **Scientific & Clinical Curiosity** - **When was theophylline first introduced for respiratory disease?** Theophylline was first isolated in the early 190s and approved for asthma treatment in the 195s, making it one of the oldest bronchodilators still in clinical use. - **How does Theo-24 Sr compare to inhaled bronchodilators?** Oral theophylline provides systemic bronchodilation that can complement inhaled β₂-agonists, especially in patients with poor inhaler technique or persistent symptoms despite inhaled therapy. ## Glossary **Bronchodilator** : A medication that relaxes airway smooth muscle, increasing the diameter of the airways and improving airflow. **CYP1A2** : An enzyme of the cytochrome P450 family responsible for metabolizing many drugs, including theophylline; its activity influences drug levels. **Therapeutic window** : The range of drug concentrations in which a medication is effective without causing unacceptable side effects. **Serum theophylline level** : The concentration of theophylline measured in the blood, used to guide dosing and avoid toxicity. **Pharmacokinetics** : The study of how a drug is absorbed, distributed, metabolized, and excreted by the body. ## Disclaimer The information presented about Theo-24 Sr is intended for general educational purposes only and does not substitute professional medical advice. Decisions regarding treatment-including any off-label use-should be made under the guidance of a qualified healthcare provider. Readers are presumed to be adult individuals capable of making informed health choices. [our online pharmacy](https://liabilis.com/order-theo-24-sr-online-en.html) provides a channel to obtain Theo-24 Sr for those who encounter limited availability through conventional pharmacies or who seek cost-effective generic alternatives. Always discuss with your physician before initiating, adjusting, or discontinuing any medication.