Colgin Plus Tablet is used to treat the common cold and allergic symptoms like sneezing, watery eyes, or itchy/watery nose and throat. The common cold is a respiratory illness affecting the nose and throat, mostly caused by viruses known as 'rhinovirus.' The virus attacks the body through the mouth, nose, or eyes and spreads quickly through droplets in the air when a person who is sick sneezes, coughs, or talks.

Colgin Plus Tablet is composed of four medicines, namely: Chlorpheniramine (anti-histamine), Phenylephrine (decongestant), Paracetamol (mild analgesic and antipyretic), and Caffeine (a stimulant).  Chlorpheniramine belongs to the class of antihistamines (anti-allergic drugs) that works by blocking the action of histamine, a substance responsible for causing allergic reactions. Phenylephrine helps in shrinking the blood vessels in the nasal passage, thereby reducing the stuffy nose. Paracetamol is an analgesic (relieves pain) and antipyretic (reduces fever) that works by inhibiting the production of certain chemical messengers in the brain known as 'prostaglandins' responsible for pain and fever. Caffeine acts as a common stimulant, which decreases sleepiness caused by Chlorpheniramine and speeds up the action of all the medicines present in Colgin Plus Tablet .

Your doctor will recommend how often you take Colgin Plus Tablet based on your medical condition. Some people may experience drowsiness, sleepiness, nausea, fatigue, difficulty in sleeping, and headache. Most of these side effects may not require medical attention and resolve gradually overtime. However, if the side effects persist or worsen, consult the doctor.

Inform your doctor if you are pregnant, planning for pregnancy, or breastfeeding before starting Colgin Plus Tablet . If you have high blood pressure (hypertension),  liver or kidney disease, or coronary artery disease (heart disease), avoid using Colgin Plus Tablet as it may worsen your existing condition and symptoms. Consumption of alcohol should be avoided as it may lead to excessive drowsiness and sleepiness. Do not take Colgin Plus Tablet if you have taken any MAO inhibitor (anti-depressant medication like Isocarboxazid, Phenelzine, Selegiline, and Tranylcypromine) in the last 14 days. Intake of more than 4 gm of paracetamol can damage your liver, so it is better to avoid the use of Colgin Plus Tablet in severe liver damage. Cetirizine present in the Colgin Plus Tablet can make you sleepy, so do not drive or operate heavy machinery after taking Colgin Plus Tablet . Phenylephrine present in Colgin Plus Tablet should be used with caution in patients with occlusive vascular disease (nerve/artery blockage), including Raynaud's phenomenon (decreased blood flow to the fingers).

Colgin Plus Tablet is primarily used to treat common cold symptoms and allergic symptoms like sneezing, watery eyes, or itchy/watery nose and throat. It is composed of four medicines: Chlorpheniramine (anti-histamine), Phenylephrine (decongestant), Paracetamol (mild analgesic and antipyretic), and Caffeine (a stimulant). Chlorpheniramine belongs to the class of antihistamines (anti-allergic drugs) that works by blocking the action of histamine, a substance responsible for causing allergic reactions. Phenylephrine helps in shrinking the blood vessels in the nasal passage, thereby reducing stuffy nose. Paracetamol is an analgesic (relieves pain) and antipyretic (reduces fever) that works by inhibiting the production of certain chemical messengers in the brain known as 'prostaglandins' responsible for pain and fever. Caffeine acts as a common stimulant, which decreases sleepiness caused by Chlorpheniramine and speeds up the action of all the medicines present in Colgin Plus Tablet . 

If you are allergic to Colgin Plus Tablet or any other medicines, please tell your doctor. If you are pregnant, it is advised to inform your doctor before using Colgin Plus Tablet . Do not use Colgin Plus Tablet in breastfeeding mothers without a doctor’s advice as it contains caffeine, which may be excreted in breast milk and cause harm to the baby. Colgin Plus Tablet is not recommended for children below 4 years. Please do not take more than the prescribed dose of Colgin Plus Tablet as it may cause liver damage and can be lethal.  If you have high blood pressure, diabetes, hyperthyroidism (overactive thyroid), asthma, chronic obstructive pulmonary disease (COPD), stomach ulcer, enlarged prostate gland,  kidney, liver, heart, or urinary problems, inform your doctor before taking Colgin Plus Tablet . Do not take Colgin Plus Tablet if you have taken an MAO inhibitor (anti-depressant medication) in the past 14 days. Also, avoid intake of chocolate, alcohol, and caffeine-containing beverages like coffee as they may increase the risk of severity of side effects. Do not take Colgin Plus Tablet if you have taken any MAO inhibitor (anti-depressant medication like Isocarboxazid, Phenelzine, Selegiline, and Tranylcypromine) in the last 14 days. Cetirizine present in the Colgin Plus Tablet can make you sleepy, so do not drive or operate heavy machinery after taking Colgin Plus Tablet . Phenylephrine present in Colgin Plus Tablet should be used with caution in patients with occlusive vascular disease (nerve/artery blockage) including Raynaud's phenomenon (decreased blood flow to the fingers).