Indmark Biotech Pvt Ltd

Ambroxol + Guaifenesin + Levocetirizine + Menthol is a combination of four medicines: Ambroxol , Guaifenesin , Levocetirizine and Menthol which relieve cough with mucus. Ambroxol is a mucolytic which thins and loosens mucus (phlegm), making it easier to cough out. Guaifenesin is an expectorant which works by decreasing the stickiness of airway secretions and helps in their removal from the airways. Levocetirizine is an antiallergic which relieves allergy symptoms like runny nose, watery eyes and sneezing.

Chlorpheniramine, dextromethorphan, and phenylephrine is a combination medicine used to treat cough, runny or stuffy nose, sneezing, itching, and watery eyes caused by allergies, the common cold, or the flu.

LEVOSALBUTAMOL 1MG+AMBROXOL 30MG +GUAIPHENESIN 50 MG : Ambroxol + Levosalbutamol + Guaifenesin is a combination of three medicines: Ambroxol , Levosalbutamol and Guaifenesin, which relieves cough with mucus. Ambroxol is a mucolytic which thins and loosens mucus (phlegm), making it easier to cough out

Ambroxol+Guaifenesin+Terbutaline is used in the treatment of cough with mucus. Ambroxol + Guaifenesin + Terbutaline is a combination of three medicines: Ambroxol , Guaifenesin and Terbutaline, which relieves cough with mucus. Ambroxol is a mucolytic which thins and loosens mucus (phlegm), making it easier to cough out.

Cyproheptadine+Tricholine Citrate is used as appetite stimulant. Cyproheptadine + Tricholine Citrate is a combination of two medicines: Cyproheptadine and tricholine citrate which revives appetite. Cyproheptadine is an appetite stimulant.

StayHappi Magaldrate+Simethicone 400mg/20mg Oral Suspension. StayHappi Magaldrate+Simethicone 400mg/20mg Oral Suspension is a combination medicine used in the treatment of acidity, stomach ulcer, bloating. It neutralizes excessive acid in the stomach and helps in easy passage of gas.

This medication is a laxative used to treat constipation. It may help to increase the number of bowel movements per day and the number of days you have a bowel movement. Lactulose is a colonic acidifier that works by increasing stool water content and softening the stool. It is a man-made sugar solution.

Lycopene Antioxidant Multivitamin and Multimineral Syrup are used to treat and prevent vitamin deficiency caused by poor eating habits, problems affecting the body's ability to absorb nutrition from food, or increased need for vitamins, and minerals due to stress, or certain illness.

It may be used to treat conditions caused by low calcium levels such as bone loss (osteoporosis), weak bones (osteomalacia/rickets), decreased activity of the parathyroid gland (hypoparathyroidism), and a certain muscle disease (latent tetany).

Ferrous Ascorbate & Folic Acid syrups are good for all those who suffer from low haemoglobin, pregnant & lactating women, loss of appetite and those with anaemia etc. It is a synthetic form of iron and vitamin C. The medicines help prevent spine bifida in an unborn fetus and iron deficiency anaemia. Folate, is a form of folic acid, folacin, and vitamin B9. It is used in dietary supplements and fortified foods. The syrup can be used by adults and children as well. It helps produce and maintain new cells especially red blood cells in the body.

Sucralfate+Oxetacaine is used in the treatment of acidity, heartburn and stomach ulcers. Sucralfate + Oxetacaine is a combination of two medicines: Sucralfate and Oxetacaine / Oxethazaine. Sucralfate is a medication to treat ulcers.

This medication is a multivitamin and iron product used to treat or prevent vitamin deficiency due to poor diet, certain illnesses, or during pregnancy.

Ginseng Extract 42.5 mg, Ginko Biloba 20 mg, Green Tea Extract 10 mg, GarlicExtract 2 mg, Grape Seed Extract 10 mg, Guggul 5 mg, Glycyrriza Glabra 5 mg,Green Coffe Bean 10 mg & Ginger Root Extract 10 mg Syrup

iindmark Biotech Pvt Ltd is a growing PCD Pharma company in Bihar and is committed to increase access to high-quality healthcare by developing, producing and marketing affordable pharmaceutical products in Domestic Market . We have a very well designed PCD Pharma program to provide PCD franchise to our customers. Your search for best PCD Pharma company ends here. The company focuses on providing high quality, affordably priced products to its customers and supports all these with dedicated customer service. Thinking about propaganda pharma companies you should think about Indmark Biotech.

Methylcobalamin With Multivitamin,multimineral & Zinc Syrup

NIMESULIDE and PARACETAMOL is prescribed mainly to treat pain and get relief from discomfort caused by conditions like tooth pain, arthritis, period pain and other types of short-term pains.

Iron, Methylcobalamin, Calcium With Multivitamin, Multimineral & AntioxidantsSyrup

L-lysine With Vitamin B-complex In Therapeutic Dosage Syrup

It is used to treat various bacterial infections of the respiratory system (like pneumonia, bronchitis, tonsillitis, pharyngitis and sinusitis), skin infections (like acne and rosacea), ear infections, and sexually transmitted infections.

Cefuroxime is used to treat certain infections caused by bacteria, such as bronchitis(infection of the airway tubes leading to the lungs); gonorrhea (a sexually transmitted disease); Lyme disease (an infection that may develop after a person is bitten by a tick); and infections of the skin, ears, sinuses, throat, tonsils,, and urinary tract. Cefuroxime is in a class of medications called cephalosporin antibiotics. It works by stopping the growth of bacteria.

It is used to treat various bacterial infections of the respiratory system (like pneumonia, bronchitis, tonsillitis, pharyngitis and sinusitis), skin infections (like acne and rosacea), ear infections, and sexually transmitted infections

Aceclofenac 50mg + Paracetamol 125mg / 5ml belongs to a class of drugs called non-steroidal anti-inflammatory drugs (NSAIDS). The medicine helps to lower the body temperature (fever) and reduce pain as well as inflammation, etc. It works effectively for both infants and children.

This medication is a multivitamin and iron product used to treat or prevent vitamin deficiency due to poor diet, certain illnesses, or during pregnancy.

Chlorpheniramine Maleate + Paracetamol + Phenylephrine helps relieve symptoms of cold and flu such as headache, sore throat, runny nose, muscular pain, and fever. It may cause dizziness and sleepiness.

Etoricoxib helps to reduce the pain and swelling (inflammation) in the joints and muscles of people 16 years of age and older with osteoarthritis, rheumatoid arthritis, ankylosing spondylitis and gout.

Cefpodoxime Proxetil 50mg Dry Syrup kills the infection-causing bacteria in your body. This medicine is used to treat many different types of infections such as those of the brain (meningitis), lungs (pneumonia), ear, abdomen, urinary tract, bones and joints, skin, blood, and heart.

Cefoprox 100mg Dry Syrup kills the infection-causing bacteria in your body. This medicine is used to treat many different types of infections such as those of the brain (meningitis), lungs (pneumonia), ear, abdomen, urinary tract, bones and joints, skin, blood, and heart.

Amoxyclav 200mg/28.5mg Syrup is an antibiotic medicine that helps treat bacterial infections of the ear, nose, throat, chest, lungs, teeth, skin, and urinary tract.

Amoxycillin works by stopping the growth of bacteria. Clavulanic Acid reduces resistance and enhances the activity of Amoxycillin against bacteria. This combination medicine can be used to treat many different bacterial infections such as ear, sinus, throat, lung, urinary tract, skin, teeth, joints, and bones

Ofloxacin+Metronidazole+Simethicone is used in the treatment of diarrhea. Ofloxacin + Metronidazole + Simethicone is a combination of three antibiotics: Ofloxacin , Metronidazole and Simethicone which treat diarrhoea. Ofloxacin kills bacteria by preventing them from reproducing and repairing themselves.

Suprax (cefixime) for Oral Suspension is a cephalosporin antibiotic used to treat many different types of infections caused by bacteria.

Cefixime is used to treat a wide variety of bacterial infections. This medication is known as a cephalosporin antibiotic. It works by stopping the growth of bacteria. This antibiotic treats only bacterial infections

Mefenamic Acid+Paracetamol is used for pain relief and fever. It relieves pain and inflammation in conditions like rheumatoid arthritis, osteoarthritis and menstrual pain. It is also used to treat mild to moderate pain. Mefenamic Acid + Paracetamol is a combination of two medicines: Mefenamic Acid and Paracetamol

Levocetirizine+Montelukast 2.5mg/4mg Syrup is commonly prescribed in children to treat symptoms of allergy such as runny nose, sneezing, itching, swelling, congestion, and watery eyes. It may also help in the treatment of asthma and skin allergies.

It is used for mild to moderate pain including headache, migraine, nerve pain, toothache, sore throat, period pains and general aches and pains. It is also used to help reduce a fever (high temperature).

Ceftriaxone is a prescription medicine used to treat the symptoms of infections such as intra-abdominal infection, ear infection, pelvic inflammatory disease, prosthetic joint infection, meningitis, sexually transmitted diseases and as surgical prophylaxis

Ceftriaxone injection is used to treat certain infections caused by bacteria such as gonorrhea (a sexually transmitted disease), pelvic inflammatory disease (infection of the female reproductive organs that may cause infertility), meningitis (infection of the membranes that surround the brain and spinal cord),

Levofloxacin is used to treat infections of the sinuses, skin, lungs, ears, airways, bones, and joints caused by susceptible bacteria.

Ceftriaxone+Sulbactam 1000mg/500mg Injection can be used to treat many different bacterial infections such as ear, sinus, throat, lung, urinary tract, skin and soft tissues.

DOMPERIDONE+PANTOPRAZOLE is a widely used medicine to treat peptic ulcers and gastroesophageal reflux disease (GERD). DOMPERIDONE+PANTOPRAZOLE prevents the release of stomach acid and relieves symptoms of food pipe lining inflammation (esophagitis), and gastroesophageal reflux disease (GERD), or heartburn.

Diclofenac Potassium 50 mg Paracetamol 325 mg Chlorzoxazone 250 mg Tablet. It is a pain reliever prescribed to treat a wide variety of conditions. The combination of medications makes it useful for relieving inflammation, relaxing muscle, and reducing both fevers and pains.

Pantop 40 MG Injection is a medicine that contains pantoprazole. It is used to treat conditions caused due to excessive acid production in your stomach. Stomach and duodenal ulcers, gastroesophageal reflux disease (GERD), and Zollinger-Ellison syndrome are certain conditions associated with high levels of stomach acid.

Diclofenac+Paracetamol+Serratiopeptidase is used for pain relief. It relieves pain in conditions like headache, mild migraine, muscle pain, joint pain, dental pain, osteoarthritis, rheumatoid arthritis or period pain.

Amikacin Sulphate 500mg Injection is an antibiotic used to prevent or treat a wide variety of bacterial infections. These may include infections of the urinary tract, bones, and joints, lungs (eg. pneumonia), brain, blood, among others. It is also used in hospitalized patients to prevent infections.

Cefixime is used to treat certain infections caused by bacteria such as bronchitis (infection of the airway tubes leading to the lungs); gonorrhea (a sexually transmitted disease); and infections of the ears, throat, tonsils, and urinary tract. Cefixime is in a class of medications called cephalosporin antibiotics.

Numylin 1500mcg Injection 2ml contains methylcobalamin, a form of vitamin B12, which helps to protect the nerves from damage and also helps to promote blood cell production. It regulates body functions, such as cell multiplication, blood formation, and protein synthesis.

Esdom-DSR Capsule is a prescription medicine used to treat gastroesophageal reflux disease (Acid reflux) and indigestion by relieving the symptoms such as heartburn, stomach pain, or irritation.

This medicine is used for treating or preventing vitamin deficiency. Deficiency of vitamins may cause anemia and other nerve problems

RABEPRAZOLE SODIUM + DOMPERIDONE is a gastrointestinal medicine composed of Rabeprazole (stomach acid reducer) and Domperidone (nausea/vomiting reducer). Together they reduce the amount of acid your stomach makes and decrease the symptoms of nausea and vomiting.

This medication is used to treat a wide variety of bacterial infections. This medication is known as a cephalosporin antibiotic. It works by stopping the growth of bacteria. This antibiotic treats only bacterial infections.

This medication is used alone or with other medications to prevent nausea and vomiting caused by cancer chemotherapy. It is also used to prevent and treat nausea and vomiting after surgery. It works by blocking one of the body's natural substances (serotonin) that causes vomiting.

It prevents newly hatched insect larvae (worms) from growing or multiplying in your body. Albendazole is used to treat certain infections caused by worms such as pork tapeworm and dog tapeworm.

Piptaz 4000 mg/500 mg Injection is a combination of two medicines. It is used to treat bacterial infections like tonsillitis, sinusitis, otitis media, respiratory tract infections, urinary tract infections, boils, abscesses, cellulitis, wound infection, bone infection and oral cavity infections

Defcort 6 Tablet gives relief in inflammatory conditions that affect muscles and joints such as arthritis and ankylosing spondylitis. It also helps manage other inflammatory conditions such as asthma, inflammatory bowel disease, uveitis, ulcerative colitis, and allergies

ARGISEN-P L-arginine is used for heart and blood vessel conditions including congestive heart failure (CHF), chest pain, high blood pressure, and coronary artery disease.

It is a pain reliever prescribed to treat a wide variety of conditions. The combination of medications makes it useful for relieving inflammation, relaxing muscle, and reducing both fevers and pains. It is commonly used to patients suffering from severe headaches, arthritis, swelling or skeletal muscle injuries.

Energy Drink (Orange Flavour)

DROTAVERINE+MEFENAMIC ACID is a combination medicine used to treat abdominal pain, muscle pain, migraine headache, functional bowel disorders, dysmenorrhea (menstrual cramps), heavy bleeding during periods, renal colic pain, and pain after surgery.

The Vanilla Sugar-Free Whey Protein helps to reduce postprandial glucose. The GRD Whey has immune-enhancing properties and helps strengthen the immune system. GRD Sugar-Free Powder is useful in maintaining a healthy gut. It promotes satiety and helps in weight reduction.

Rabeprazole is used to treat duodenal ulcers, gastroesophageal reflux disease (GERD), and Zollinger-Ellison syndrome, a condition where the stomach produces too much acid. It may also be used together with antibiotics (eg, amoxicillin, clarithromycin) to treat ulcers associated with infections.

The powerful combination of herbs alleviates joint pain, muscle trauma, sprains, arthritis, sciatica, osteoarthritis, lumbago, gout, and soft tissue injuries. It is also ideal for athletes, it helps relax muscles and recover from sports-related injuries.

Rabeprazole Sodium & Domperidone Tablet is a combination medicine used to treat gastroesophageal reflux disease (Acid reflux) and peptic ulcer disease by relieving the symptoms of acidity such as heartburn, stomach pain, or irritation

Herbal Tonic For Kidney & Urinary Stone

Pantoprazole reduces the amount of acid your stomach makes. It's used for heartburn, acid reflux and gastro-oesophageal reflux disease (GORD) – GORD is when you keep getting acid reflux. It's also taken to prevent and treat stomach ulcers.

Liver Tonic is purely a herbal formulation with no side effects, its a highly effective ayurvedic medicine used in various type ofLiver Disorderslike alcoholic liver disease, enlarge and fatty liver, high cholesterol levels, constipation, skin diseases anddigestion related issues etc.

Montelukast Sodium And Levocetirizine Hydrochloride Tablet are used in the treatment for conditions like sneezing, runny nose, hay fever, skin allergies, etc. The medication contains two drugs: Levocetirizine (antiallergic) & Montelukast (leukotriene antagonist).

Alkaliser Syrup is a medicine used in the treatment of gout and kidney stones. It stops the production of uric acid in the body and reduces the episodes of gout attack and prevent kidney stones.

Utrowel is beneficial in menstrual irregularities, abnormal uterine discharges and pre-menstrual cramps, common issues faced by women today. It is also useful in female infertility.

Diclofenac sodium 1.0mg,diclofenac diethylamine 1.16%,oleum lini 3.0%,methylsalicylate 10.0% & menthol 5.0% Ge

Ofloxacin+Ornidazole+Itraconazole+Clobetasol is used in the treatment of Skin infections. Ofloxacin + Ornidazole + Itraconazole + Clobetasol is a combination of four medicines: Ofloxacin , Ornidazole , Itraconazole and Clobetasol

Cefixme 100mg Tablet is an antibiotic belonging that is used to treat a variety of bacterial infections. It is effective in infections of the respiratory tract (eg. pneumonia), urinary tract, ear, nasal sinus, throat, and some sexually transmitted diseases .

Ketoconazole IP 2.00% w/w, Iodochlorhydroxyquinoline IP 1.00% w/w,tolnaftate IP 1.00% w/w, Neomycin Sulphate IP Eq to neomycin 0.10% w/w &Clobetasol propionate IP 0.05% w/w Cream

Cefixime is used to treat certain infections caused by bacteria such as bronchitis (infection of the airway tubes leading to the lungs); gonorrhea (a sexually transmitted disease); and infections of the ears, throat, tonsils, and urinary tract. Cefixime is in a class of medications called cephalosporin antibiotics.

Cefixime is also sometimes used to treat sinus infections in penicillin allergic patients, pneumonia, shigella (an infection that causes severe diarrhea), salmonella (an infection that causes severe diarrhea), and typhoid fever (a serious infection that is common in developing countries). Talk to your doctor about the risks of using this medication for your condition.

Cefixime Trihydrate is an oral third generation cephalosporin antibiotic used to treat infections caused by bacteria such as pneumonia; bronchitis; gonorrhea; and ear, lung, throat, and urinary tract infections.

Fluconazole capsule is used for the treatment of mucosal candidiasis (oropharyngeal, oesophageal), invasive candidiasis, cryptococcal meningitis and the prophylaxis of candidal infections in immunocompromised patients

Methylprednisolone is used to treat conditions such as arthritis, blood disorders, severe allergic reactions, certain cancers, eye conditions, skin/kidney/intestinal/lung diseases, and immune system disorders

Levofloxacin is used to treat a variety of bacterial infections. This medication belongs to a class of drugs known as quinolone antibiotics. It works by stopping the growth of bacteria. This antibiotic treats only bacterial infections

Oflox 200 Tablet is an antibiotic that helps treat bacterial infections. It is used in treating infections of the urinary tract, nose, throat, skin and soft tissues, and lungs (pneumonia). It cures the infection by stopping the further growth of the causative bacteria.

Genericart Ofloxacin+Ornidazole 200mg/500mg Tablet is a combination of two antibiotics. It is used in the treatment of bacterial and parasitic infections. It effectively treats a wide range of bacterial infections that may occur in the teeth, lungs, gastrointestinal infections, urinary and genital tract.

Amoxicillin/clavulanic acid is a combination penicillin-type antibiotic used to treat a wide variety of bacterial infections. It works by stopping the growth of bacteria. This antibiotic treats only bacterial infections

It is used to treat bacterial infections like, tonsillitis, sinusitis, otitis media, respiratory tract infections, urinary tract infections, boils, abscesses, cellulitis, wound infection, bone infection, and oral cavity infections. The medicine works by killing the harmful bacteria that cause infections.

Levocetirizine is used to relieve runny nose; sneezing; and redness, itching, and tearing of the eyes caused by hay fever, seasonal allergies, and allergies to other substances such as dust mites, animal dander, and mold. It is also used to treat symptoms of hives, including itching and rash

Nimelide Plus 100 mg/325 mg Tablet is a combination medicine that helps in relieving pain. It is used to relieve pain and inflammation in conditions like rheumatoid arthritis, ankylosing spondylitis, and osteoarthritis. It is also used to relieve fever, muscle pain, back pain, toothache, or pain in the ear and throat.

Ondansetron is used to prevent nausea and vomiting caused by cancer chemotherapy, radiation therapy, and surgery. Ondansetron is in a class of medications called serotonin 5-HT3 receptor antagonists. It works by blocking the action of serotonin, a natural substance that may cause nausea and vomiting

Calcium Carbonate 1250 mg & Vitamin D3 250 for the treatment of vitamin D and calcium deficiency. It is used for the treatment of osteoporosis or bone-related disorders. It is also used in special populations like the elderly, pregnant, breastfeeding who need vitamin D and calcium supplements

Ferrous Ascorbate+Folic Acid+Zinc is used in the treatment of iron deficiency. Ferrous Ascorbate + Folic Acid + Zinc is a combination of three nutritional supplements. Ferrous Ascorbate is a combination of iron and vitamin C. Iron replenishes the iron stores in your body and corrects iron deficiency anemia

This medication is used to treat a wide variety of bacterial infections. This medication is known as a cephalosporin antibiotic. It works by stopping the growth of bacteria. This antibiotic treats only bacterial infections.

CETIRIZINE+PARACETAMOL+PHENYLEPHRINE is primarily used to treat the common cold and allergies symptoms such as runny nose, blocked nose, sneezing, congestion, pain & fever.

Chlorpheniramine Maleate + Paracetamol + Phenylephrine helps relieve symptoms of cold and flu such as headache, sore throat, runny nose, muscular pain, and fever. It may cause dizziness and sleepiness.

This product is used to treat high blood pressure (hypertension). Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. This product contains 2 medications: telmisartan and amlodipine. Telmisartan is an angiotensin receptor blocker (ARB) and amlodipine is a calcium channel blocker

Aceclofenac+Paracetamol+Chlorzoxazone 100mg/325mg/250mg Tablet is a combination medicine that is used to relieve pain, inflammation, and swelling in conditions that affect muscles.

Aceclofenac+Paracetamol 100mg/325mg Tablet is a pain-relieving medicine. It is used to reduce pain and inflammation in conditions like rheumatoid arthritis, ankylosing spondylitis, and osteoarthritis. It may also be used to relieve muscle pain, back pain, toothache, or pain in the ear and throat

Aceclofenac 100 mg, Paracetamol 325 mg & Serrtiopeptidase 15 mg Tablet is a pain-relieving medicine. It is used to reduce pain and inflammation in conditions like rheumatoid arthritis, ankylosing spondylitis, and osteoarthritis. It may also be used to relieve muscle pain, back pain, toothache, or pain in the ear and throat

Levocetirizine+Montelukast 2.5mg/4mg Tablet. StayHappi Levocetirizine+Montelukast 2.5mg/4mg Tablet is commonly prescribed in children to treat symptoms of allergy such as runny nose, sneezing, itching, swelling, congestion, and watery eyes. It may also help in the treatment of asthma and skin allergies

Azithromycin is an antibiotic that fights bacteria. Azithromycin is used to treat many different types of infections caused by bacteria, such as respiratory infections, skin infections, ear infections, eye infections, and sexually transmitted diseases.

ALPHA LIPOIC ACID+FOLIC ACID+MECOBALAMIN+PYRIDOXINE (VITB6) consists of four supplements, namely: Mecobalamin, Alpha lipoic acid, Folic acid, and Pyridoxine

Azithromycin is used to treat certain bacterial infections, such as bronchitis; pneumonia; sexually transmitted diseases (STD); and infections of the ears, lungs, sinuses, skin, throat, and reproductive organs.

DOXYCYCLINE+LACTIC ACID BACILLUS contains Doxycycline and Lactic acid bacillus. DOXYCYCLINE+LACTIC ACID BACILLUS is used to treat bacterial infections such as urinary tract infections, intestinal infections, respiratory infections, eye infections, gum infections, and sexually transmitted infections (like gonorrhoea, syphilis)

prebiotics and probiotics are effective for treating diarrhea, irritable bowel syndrome, allergic disorders, and even the common cold.

Itraconazole is used to treat a variety of fungal infections. It belongs to a class of drugs known as azole antifungals. It works by stopping the growth of fungi.

Domperidone+Omeprazole 10mg/20mg Capsule is a prescription medicine used to treat gastroesophageal reflux disease (Acid reflux) and peptic ulcer disease by relieving the symptoms such as heartburn, stomach pain, or irritation.

Vitamin D helps control parathyroid hormone and the levels of certain minerals (such as calcium, phosphorus) that are needed for building and keeping strong

This medication is a multivitamin and iron product that treat or prevent vitamin deficiency

Calcium citrate maleate 500 mg, Calcitrol 0.25 mcg, Vitamin K27 45 mcg, EPA90, DHA 60, Mecobalamin 750 mcg, Folic Acid 400 mcg & boron 1.5 mg SoftgelCapsules

Fatty Acid, Green Tea Extract, Ginkgo Biloba, Ginseng, Grape Seed Extract, Antioxidants, Vitamins, Minerals & Trace ElementsFatty Acid, .

Ginseng with Multivitamin, Multiminerals & Antioxidants Softgel Capsules. This multivitamin and iron supplement is intended to treat or prevent vitamin insufficiency caused by a poor diet, certain illnesses, or pregnancy

FUNGAL DIASTASE+PEPSIN helps in relieving digestive disorders like indigestion, heartburn, gas, and abdominal discomfort. It contains two digestive enzymes, namely: Fungal diastase and Pepsin