Buy Theophylline
theophylline
$23.70
- Active ingredient: Theophylline
- Category: Allergy & Asthma
- Delivery time: Airmail (14-21 days) | EMS trackable (5-9 days)
- Prescription: Included
- Availability: In Stock
Generic Theophylline 400mg tablets are available to order from our Singapore pharmacy with dependable delivery. This bronchodilator medication helps open airways by relaxing the muscles around them, providing relief for chronic asthma, bronchitis, and COPD symptoms. Theophylline works by increasing the diameter of the bronchial tubes, making breathing easier for those with respiratory conditions. It serves as a maintenance treatment for adults managing persistent breathing difficulties who need long-term symptom control alongside their respiratory management plan.
Table of contents
- Generic Theophylline Buyer and Patient Handbook in Singapore
- What is Theophylline?
- Who Should Use Theophylline?
- How Does It Work?
- Why Choose Theophylline?
- Dosage, Administration, Lifestyle and Dietary Recommendations
- Recommended Dosage
- How to Take
- Missed Dose
- Overdose
- Special Populations
- Lifestyle & Diet
- Precautions and Warnings
- Drug Interactions
- Potential Side Effects
- Common Side Effects
- Less Common Side Effects
- Serious Side Effects
- Who Should Avoid This Medication?
- Storage Instructions
- Theophylline Alternatives
- Frequently Asked Questions
- How quickly does Theophylline start working?
- Can I take Theophylline with my inhaled corticosteroid?
- Does smoking affect Theophylline levels?
- Is it safe to consume caffeine while on Theophylline?
- What should I do if I experience a headache?
- Can Theophylline be used for acute asthma attacks?
- Why am I required to have blood tests while taking Theophylline?
- Is Theophylline suitable for children?
- Glossary
- Disclaimer
- Theophylline Drug Class
- Theophylline Connected Conditions
- How to order Theophylline from our Online Pharmacy
- Reviews
- Write your review
Generic Theophylline Buyer and Patient Handbook in Singapore
What is Theophylline?
Theophylline is a xanthine bronchodilator used to treat chronic Asthma and certain allergic respiratory conditions. It relaxes airway smooth muscle, improving breathing in patients with persistent symptoms. The drug is approved by the Health Sciences Authority (HSA) and is available as a 400 mg oral tablet.
Who Should Use Theophylline?
- Adults with moderate-to-severe persistent asthma who need additional control beyond inhaled therapy.
- Patients experiencing exercise-induced bronchospasm.
- Individuals with certain allergic airway disorders where a bronchodilator is indicated.
How Does It Work?
Theophylline inhibits phosphodiesterase enzymes, raising intracellular cyclic AMP levels. ↑cAMP → relaxation of airway smooth muscle and reduced inflammatory mediator release. Think of it as “pressing the gas pedal” for the lungs, allowing air to flow more freely. Caution: Theophylline has a narrow therapeutic window; high levels can cause toxicity.
Why Choose Theophylline?
- Generic advantage: Identical efficacy to brand forms at a lower cost.
- Convenient oral dosing for patients who prefer tablets over inhalers for occasional use.
- Off-label uses (e.g., Apnea of Prematurity) should only be considered after professional guidance.
Dosage, Administration, Lifestyle and Dietary Recommendations
Recommended Dosage
- 400 mg tablet taken once daily for most adults (dose may be adjusted based on blood levels).
How to Take
- Swallow whole with a full glass of water.
- Can be taken with or without food; however, a consistent routine helps maintain steady blood levels.
Missed Dose
- If you remember within 12 hours, take the missed tablet.
- If more than 12 hours have passed, skip and resume the regular schedule.
Overdose
- Seek emergency care immediately.
- Symptoms may include Nausea, Vomiting, rapid heartbeat, or Seizures.
Special Populations
- Elderly: Start at a lower dose (e.g., 200 mg) and monitor blood levels.
- Renal or hepatic impairment: Dose reduction is often required.
- Pregnancy & breastfeeding: Use only if clearly needed; discuss risks with a healthcare professional.
Lifestyle & Diet
- Avoid large amounts of caffeine (coffee, tea, cola) as they can increase side-effects.
- Grapefruit juice may raise theophylline levels; limit intake.
- Alcohol can potentiate central nervous system effects-consume sparingly.
Precautions and Warnings
- Monitor blood theophylline concentrations regularly, especially after dose changes.
- Do not combine with strong CYP1A2 inhibitors (e.g., fluoroquinolones, cimetidine) without supervision.
- Use cautiously in patients with cardiac arrhythmias, seizures, or a history of liver disease.
Drug Interactions
| Drug Class | Risk | Action |
|---|---|---|
| Macrolide antibiotics | ↑Theophylline levels | Reduce dose; monitor labs |
| CYP1A2 inhibitors | ↑Toxicity | Lower dose; check symptoms |
| Beta-agonists (inhaled) | Additive cardiac effects | Observe heart rate |
Potential Side Effects
Common Side Effects
- Nausea
- Headache
- Insomnia
Less Common Side Effects
- Tremor
- Palpitations
- Diarrhea
Serious Side Effects
- Seizures
- Severe arrhythmias
- Persistent vomiting (call emergency services)
Who Should Avoid This Medication?
- Known hypersensitivity to theophylline or other xanthines.
- Uncontrolled cardiac arrhythmias.
- Active Peptic Ulcer Disease (risk of irritation).
Storage Instructions
- Keep tablets in a dry place at room temperature (15-30 °C).
- Store away from direct sunlight and moisture.
- Keep out of reach of children.
Theophylline Alternatives
| Name | Class | Key Difference |
|---|---|---|
| Salbutamol inhaler | Short-acting β2-agonist | Rapid relief, inhaled route |
| Montelukast tablets | Leukotriene receptor antagonist | Oral, anti-inflammatory, no bronchodilation |
| Formoterol inhaler | Long-acting β2-agonist | Twice-daily dosing, inhaled |
Frequently Asked Questions
How quickly does Theophylline start working?
Effects may appear within 30 minutes to 2 hours, but full steady-state benefit usually requires several days of consistent dosing.
Can I take Theophylline with my inhaled corticosteroid?
Yes, the two drugs work via different mechanisms and are often prescribed together for better asthma control.
Does smoking affect Theophylline levels?
Smoking induces metabolism, potentially lowering drug concentration; dose adjustment may be needed.
Is it safe to consume caffeine while on Theophylline?
Moderate caffeine intake is generally acceptable, but high amounts can increase side-effects; limit to 1-2 cups of coffee per day.
What should I do if I experience a headache?
Stay hydrated and assess for other symptoms. If headaches are persistent or severe, consult a healthcare professional.
Can Theophylline be used for acute asthma attacks?
It is not a rescue medication; keep a fast-acting inhaler for sudden symptoms.
Why am I required to have blood tests while taking Theophylline?
Because the therapeutic range is narrow, blood monitoring ensures the dose remains effective without toxicity.
Is Theophylline suitable for children?
Pediatric use is limited and requires weight-based dosing; a specialist should determine suitability.
Glossary
- Bronchodilator: A medication that relaxes airway muscles to improve airflow.
- Cyclic AMP (cAMP): A cellular messenger that promotes muscle relaxation in the lungs.
- Therapeutic window: The blood concentration range where a drug is effective without causing harmful effects.
Disclaimer
This handbook provides general information about Theophylline and is not a substitute for professional medical advice. Off-label uses require careful consideration and should be discussed with a qualified health professional. Our service offers educational resources only; users remain responsible for their health decisions. Always consult a licensed practitioner before starting or changing any medication regimen.
Theophylline Drug Class
Theophylline Connected Conditions
How to order Theophylline from our Online Pharmacy
To order Theophylline on our online pharmacy, all you need to do is select the required dosage and quantity of pills above. The cost of the selected pack will appear automatically. Next, add the chosen amount to your cart by clicking the Add to Cart button. You can either continue shopping for more medications or head to the checkout. At the Checkout, finalize your purchase through our secure payment gateway.
Theophylline / Theophylline pills are made using high-quality generic ingredients and are subject to strict quality control in line with WHO and Health Sciences Authority (HSA) standards. However, please note that Theophylline pills are dispatched from outside Singapore due to prescriptions issued overseas.
Disclaimer: The content on this website is provided solely for informational purposes and is not intended to replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with any questions or concerns regarding your health, and never disregard or delay seeking professional advice based on the information presented here. Use of this website does not create a doctor-patient relationship, and in the event of a medical emergency, please contact your local emergency services immediately. Our website assumes no responsibility or liability for any errors or omissions in the content provided.
Reviews
Just started on the 400mg dose for my asthma, been about a week. The breathing is definitely easier, like noticeably. But man, the jitters. Feels like I downed four shots of espresso on an empty stomach. I wake up sweating a bit too. My doctor said it'll wear off, but right now I feel permanently caffeinated. Thinking of breaking the pill in half for a few days, maybe?
This is my fifth year on Theophylline. It controls my nighttime shortness of breath perfectly. The key hack? Avoid caffeine and black tea entirely, especially in the afternoon. If your levels get too high, you get the awful headache and nausea. I take mine exactly 12 hours apart, split 200mg morning and 200mg evening. Consistency is everything with this stuff, it's not a rescue inhaler.
They put me on this when they couldn't stabilize my levels with just inhalers. It works, truly. I can jog now without feeling like I'm drowning. But the indigestion is brutal. I have to take the pill right dead center after a big meal, usually rice and chicken. If I take it on an empty stomach, I get heartburn so bad I think I'm having a heart attack. Be prepared for stomach issues.
My doctor switched me to this because of issues with corticosteroids. My breathing improved 80%, fantastic, really. But my sleep quality went down the drain. Absolute insomnia. I lay there with my heart thumping. Hack: I started taking a magnesium supplement about three hours after my evening dose. It helps calm the nervous system down and I actually get REM sleep now. Without the magnesium, forget it.
I tolerate the 400mg okay, mostly. Helps keep my airways open consistently. But I've noticed I get extremely moody and irritable sometimes, almost like PMS but all the time. My wife pointed it out. It's hard to tell if it's the drug or just life, but the timing coincides with when I started. It's a huge trade-off for clear lungs.
Just started, day three. My heart rate feels elevated, like constantly between 95 and 105 bpm. It's unnerving. My brain feels fizzy, too, like a constant low-level electrical hum. And the smell sensitivity! Everything smells sharp. The breathing is better, yes, but the cognitive side effects are making me question if it's worth it. Does this "brain buzz" ever stop?
I've been on this for years to manage chronic bronchitis. It works for the shortness of breath, but it absolutely tanks my stomach lining. I take PPIs religiously now. Another weird side effect: massive diuretic effect. You will basically pee out everything you drink. Tip: Always bring two water bottles everywhere, one for water, one for electrolytes, because you'll need them.
Theophylline is great for maintaining breathing function, but it ruined my relationship with coffee. One tiny cup of black coffee or even certain dark chocolates, and I get full-blown palpitations, tremors, and migraine. It felt like an overdose. So, watch your diet very closely! It's really effective, but you need to commit to a caffeine-free life. Absolutely critical.