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MD Pharmacology, MBBS
Last updated
23 Jan 2026 | 10:15 AM (IST)

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Synasma 100mg Injection

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Product introduction

Synasma 100mg Injection is used to treat and prevent symptoms of asthma and chronic obstructive pulmonary disorder (a lung disorder in which the flow of air to the lung is blocked). It helps in relaxing the muscles of the air passages, thus widening it and making it easier to breathe.

Synasma 100mg Injection is given as an injection by the doctor. The dose and duration of your treatment will depend on what you are being treated for and the severity of your condition. Get the injection for as long as it is prescribed to you. Do not miss any doses, in case you missed a dose, get it as soon as you remember it. Your doctor may get regular blood tests to check for medicine levels in the blood. 

The most common side effects of this medicine include vomiting, headache, nausea, and stomach upset. If these bother you or appear serious, let your doctor know. There may be ways of reducing or preventing them. Generally, it is advised not to consume alcohol or do not smoke while on treatment. You must avoid high caffeinated products like coffee, tea, and dark chocolates as it enhances drug side effects.

Before taking this medicine, let your doctor if you have kidney or liver disease or if you have heart-related problems. Your doctor should also know about all other medicines you are taking as many of these may make this medicine less effective or change the way it works. Inform your doctor if you are pregnant or breastfeeding before starting the treatment. 


Benefits of Synasma Injection

In Asthma

Asthma is a lung condition where the airways become swollen and narrow, leading to breathing difficulties, wheezing, and coughing. Synasma 100mg Injection helps relax the airway muscles and reduces inflammation, making it easier to breathe and preventing asthma attacks.

In Chronic obstructive pulmonary disease (COPD)

Chronic obstructive pulmonary disease (COPD) is a long-term disease that causes airflow blockage and breathing problems. Synasma 100mg Injection improves airflow by opening up the airways and easing breathing. It helps reduce symptoms like shortness of breath, coughing, and chest tightness, allowing better daily functioning.

Side effects of Synasma Injection

Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them

Common side effects of Synasma

  • Headache
  • Nausea
  • Upset stomach
  • Vomiting

How to use Synasma Injection

Your doctor or nurse will give you this medicine. Kindly do not self administer.

How Synasma Injection works

Synasma 100mg Injection is a bronchodilator. It works by relaxing the muscles of the airways and widens airways. This makes breathing easier.

Safety advice

Alcohol
CONSULT YOUR DOCTOR
It is not known whether it is safe to consume alcohol with Synasma 100mg Injection. Please consult your doctor.
Pregnancy
SAFE IF PRESCRIBED
Synasma 100mg Injection is generally considered safe to use during pregnancy. Animal studies do not indicate harmful effects. However, there are limited human studies.
Breast feeding
CONSULT YOUR DOCTOR
Information regarding the use of Synasma 100mg Injection during breastfeeding is not available. Please consult your doctor.
Driving
SAFE
Synasma 100mg Injection does not usually affect your ability to drive.
Kidney
CAUTION
Synasma 100mg Injection should be used with caution in patients with kidney disease. Dose adjustment may be needed.
Liver
CAUTION
Synasma 100mg Injection should be used with caution in patients with severe liver disease. Dose adjustment may be needed.

What if you forget to take Synasma Injection?

If you missed a dose of Synasma 100mg Injection, consult your doctor.

All substitutes

For informational purposes only. Consult a doctor before taking any medicines.
Synasma 100mg Injection
₹12.7/Injection
Doxoril 100mg Injection
Macleods Pharmaceuticals Pvt Ltd
₹11.01/injection
29% cheaper

Quick tips

  • You have been prescribed Synasma 100mg Injection for prevention and treatment of asthma and chronic obstructive pulmonary disease (COPD).
  • It does not work right away and should not be used to relieve sudden breathing problems. Always keep a fast-acting (rescue) inhaler with you.
  • Your doctor may take regular blood test to monitor potassium level and the level of this medicine in your body.
  • Notify your doctor if you have ever been diagnosed with kidney, liver or heart disease, or if you have a smoking history. Your dose may need to be adjusted.
  • Do not discontinue use without consulting your doctor, even if you feel better.

Fact Box

Chemical Class
Xanthine derivative
Habit Forming
No
Therapeutic Class
RESPIRATORY
Action Class
Xanthine Derivatives- Respiratory

Interaction with drugs

Taking Synasma with any of the following medicines can modify the effect of either of them and cause some undesirable side effects
If concurrent use is essential, watch out for symptoms such as nausea, vomiting, headache, dizziness, stomach pain, insomnia, irritability, tremors or flushing and consult your doc... More
If concurrent use is essential, watch out for symptoms such as nausea, vomiting, headache, dizziness, stomach pain, insomnia, irritability, tremors or flushing and consult your doc... More
If concurrent use is essential, watch out for symptoms such as nausea, vomiting, headache, dizziness, stomach pain, insomnia, irritability, tremors or flushing and consult your doc... More
If concurrent use is essential, watch out for symptoms such as nausea, vomiting, headache, dizziness, stomach pain, insomnia, irritability, tremors or flushing and consult your doc... More
If concurrent use is essential, watch out for symptoms such as nausea, vomiting, headache, dizziness, stomach pain, insomnia, irritability, tremors or flushing and consult your doc... More

FAQs

What is Synasma 100mg Injection?

Synasma 100mg Injection is a new generation long-acting oral bronchodilator. It is a methyxanthine derivative.

How does Synasma 100mg Injection work?

Synasma 100mg Injection inhibits an enzyme called phosphodiesterase which results in bronchodilation (dilation or widening of the airways in the lungs by relaxing the surrounding smooth muscle). It is used for the treatment of asthma and chronic obstructive pulmonary disease (COPD). COPD is a lung disease characterized by chronic obstruction of lung airflow that interferes with normal breathing and is not fully reversible. Synasma 100mg Injection relieves the breathlessness and cough thereby providing symptomatic relief.

Is Synasma 100mg Injection antibiotic?

Synasma 100mg Injection is not an antibiotic. Synasma 100mg Injection is a bronchodilator used for the treatment of asthma and chronic obstructive pulmonary disease (COPD).

Is Synasma 100mg Injection a steroid?

Synasma 100mg Injection is not a steroid. Synasma 100mg Injection is a bronchodilator used for the treatment of asthma and chronic obstructive pulmonary disease (COPD).

What is Synasma 100mg Injection used for?

Synasma 100mg Injection is a bronchodilator used for the treatment of asthma and chronic obstructive pulmonary disease (COPD). It helps to relieve breathlessness and cough thereby providing symptomatic relief.

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Tata 1mg's sole intention is to ensure that its consumers get information that is expert-reviewed, accurate and trustworthy. However, the information contained herein should NOT be used as a substitute for the advice of a qualified physician. The information provided here is for informational purposes only. This may not cover everything about particular health conditions, lab tests, medicines, all possible side effects, drug interactions, warnings, alerts, etc. Please consult your doctor and discuss all your queries related to any disease or medicine. We intend to support, not replace, the doctor-patient relationship.

References

  1. PubChem. Doxofylline. [Accessed 01 Apr. 2019] (online) Available from:External Link
  2. Central Drugs Standard Control Organisation (CDSCO). [Accessed 01 Apr. 2019] (online) Available from:External Link
  3. Leeford. Doxofylline [Product Information]. [Accessed 25 Jul. 2024] (online) Available from: External Link

Marketer details

Name: Sun Pharmaceutical Industries Ltd
Address: Plot no 107/108,Namli block , Ranipool, East Sikkim 737135 || Khasra No. 1335-1340,Near EPIP- I, Vill - Bhatoli Kalan ,Baddi, Solan, Himachal Pradesh, 173205
Country of origin: India

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