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Dr. Manoj Kumar
Assistant Prof. Pharmacology
AMCH Ambala cant
 Are anti-infective substances
 Which are use on the skin & mucous membrane or on
inanimate object.
 To reduce or kill microorganisms.
 They are non-selective & some of them are toxic
 These are the substances or medium by removing or
killing all micro-organisms including vegetative form of
bacteria, viruses, fungii, spores, parasite
 Which are present every where responsible for
contamination and infection.
 Destruction or inhibition of growth of all pathogenic
organisms (bacteria, viruses, fungii) on non living surfaces
 But not the spores on the surface or any medium
 If spores are also killed process is Sterlization
 These are substances which inhibit the growth or kill
micro-organisms on living surfaces such as skin & mucous
membrane. It prevent tissue infection
Good antiseptic/disinfectant
1. Rapid acting
2. Chemically stable
3. Cheap & Cidal
4. Non staining & good odour
5. Active against all pathogens
6. Active in presence of pus, blood & exudates
7. Non irritating to tissues / non corrosive
8. Non absorbable
9. Non sensitizing (no allergy)
 Oxidation of bacterial protoplasm
– Potassium permagnate, H202, Halogens
 Co-agulation (denaturation) of bacterial proteins &
disrupt cell membrane
– Phenols, chlorhexidine, alcohols, aldehydes
 Detergent like action ↑ permeability of bacterial cell
membrane
– Cetrimide, soaps
 Phenol derivatives: – phenol, cresol, hexachlorophene, chlorohexylenol
(dettol)
 Alcohols: – Ethanol, Isopropanol
 Aldehyde: – Formaldehyde , Glutaraldehyde
 Oxidizing agents:– Hydrogen peroxide, potassium per magnate.
 Acids: – Acetic acid, boric acid, benzoic acid, salicylic acid
 Halogens:– Iodine, chlorine, chlorophores.
 Metallic salt: – Mercuric compounds, silver nitrate, zinc sulphate, zinc
oxide
 Biguanides:– Chlorhexidine.
 Dyes: – Gentian violet, acriflavine, proflavine
 Quaternary ammonium:– Cetrimide.
 Earliest used antiseptic & germicides
 At 0.2% cidal activity
 Protoplasmic poison, injures microbes, tissues & cells at high
conc causes skin burn
 MOA: – denaturizing bacterial proteins & disrupting bacterial
cell membrane
 USES : – disinfect urine, faeces, pus, sputam, burns.
 Extremely irritating & mild local anaesthetic action
 Methyl Derivative of phenol, less damaging to tissues
than phenol.
 3-10 times more active
 Used for disinfection of utensils, excreta & washing
hands.
 Phenol derivative
 Does not co-agulate proteins,
 Non corrosive, Non irritating to skin
 Poorly water soluble
 Commercial used 4.8 % solution for surgical antisepsis
 Skin cream & soap: 0.8%
 Mouth wash 1%
 Chlorinated phenol act by inhibiting enzymes
 Causing bacterial lysis.
 Commonly use in soap
 Effectively only against Gm+ve
 Slow but persistant action
 >2% preparations banned
 Potassium permagnate: – Purple crystals, highly water soluble,
 Liberates oxygen which oxidizes bacterial protoplasm.
 Used for gargling, irrigating wounds, urethra (condy's lotion
diluted solution of 1:4000 to 1:10,000 )
 High conc cause burns & blistering
 It is also used to disinfect water in ponds.
 Stomach wash in alkaloidal poisoning
 Hydrogen Peroxide: – liberates nascent oxygen which
oxidizes necrotic matter & bacteria.
 Helps in loosening & removing slough, ear wax etc.
 Benzoyl Peroxide: – Widely used drug for acne.
 liberates O2 in presence of water which kills bacteria,
specially anaerobes
 Iodine,
 Iodophores
 Chlorine
 Chlorophores
 Rapidly acting broad spectrum (bacteria, fungi, virus)
 Acts by iodinating and oxidizing microbial protoplasm.
 1:20000 solution kill most vegetative forms even bacterial
spores are kill with higher concentration/longer action
 Used on cuts, degerming skin before surgery, treat ring
worm.
 Adverse effect: cause burns & blisters
 Known as povidine iodine.
 Non toxic, nonirritating, non staining prolonged
germicidal action.
 Used on boils, furunculosis, burns, ulcers, tinea,
disinfecting endoscopes & surgical instruments, surgical
scrubbing, non specific vaginitis.
 Rapid action and Potent germicide 0.1 to 0.25 ppm kill
most pathogens.
 Kills pathogens in 30 sec.
 Used to disinfect urban water supplies.
 More active in acidic or neutral medium
(1) Chlorinated lime (bleaching powder)
– obtained by action of chlorine on lime.
– used to disinfect drinking water & swimming pools
(2) Sodium hypochlorite
– Powerful disinfectant used in dairies for milk cans.
– Too Irritant to be used as antiseptic.
– Root canal therapy in dentistry
 Chlorhexidine: (Savlon) Acts by disrupting bacterial cell
membrane & denaturation of bacterial proteins
 Non irritant, more active against gram+ve bacteria.
 Used in for surgical scrub, neonatal bath, mouth wash &
general skin antiseptic.
 Most widely used antiseptic in dentistry 0.12-0.2% oral
rinse or 0.5 -1 % tooth paste
 Antiseptics cetrimide
 Detergents:- Cidal to bacteria, fungi & viruses.
 Act by altering permeability of cell membrane
 Efficiently remove dirt and grease
 Widely used as antiseptics & disinfectants for surgical
instruments, gloves etc
 Combined with chlorhexidine (savlon)
 Anionic detergents
 Weak antiseptics with cleansing action
 Washing with soap & warm water one of the most effective
methods of preventing disease transmission
 Affect only Gm+ bacteria
 Ethanol – Antiseptic, cleansing agent at 40-90% conc.
 Act by precipating bacterial proteins
 Recommended for decontamination of hands in the health
care & personal hygiene
 Irritant, should not be applied on mucous membrane, ulcers
 Open wounds produce burning sensation .
 Used for fumigation.
 37 % aqueous solution called as formalin.
 Protoplasmic poison , denaturants proteins.
 Used for preserving dead tissues.
 Use as antiseptic restricted due to bad odour & irritation
 Glutaraldehyde :- is a better sterlizing agent
 Broad spectrum activity against bacteria, fungi & viruses
 Boric acid :- weak antiseptic , bacteriostatic.
 Used for mouth wash, irrigation eyes,
 Boroglycerine pant use stomatitis and glossitis.
 Adverse effect: systemic absorption cause vomiting,
abdominal pain diarrhoea, visual disturbance & kidney
damage.
SILVER COMPOUNDS
 Silver sulphadiazine :- is active against pseudomonas seen in
burns patient.
 Silver nitrate :- rapidly kill & highly active against gonococci -
1% solution used
ZINC COMPOUNDS
 Zinc Salts:- used as eye wash, ear drops, acne.
 Calamine and zinc sulfate:- Mild antiseptic, insoluble
Gentian violet:- Active against (gram + ve), bacteria, fungi
 Used on chronic ulcers, furunculosis, bed sores, ring
worms infected, eczema.
Acriflavine and proflavine:-
 Active against gram +ve bacteria & gonocci
 Suitable for chronic ulcers & wounds
 Do not retard healing, non irritant
 These are drugs used to kill parasites that live on body
surfaces
 Lice → cause pediculosis (hair infection)
 Mites → cause scabies(skin infection)
(1) PERMETHRIN
(2) LINDANE
(3) BENZYL BENZOATE
(4) IVERMECTIN
(5) CROTAMITON
(6) SULFUR
(7) DICOPHANE (DDT)
 Broad spectrum causes neurological paralysis in insects.
 100 % cure rate nearly
 Single application needed in most cases.
 Few patients experience itching ,burning.
 first drug of choice for scabies & pediculosis.
Scabies: apply all over the body except face & head .
Wash after 8- 12 hrs.
Head lice:- massage about 30 g in to scalp & wash after 10
min.
 Broad spectrum insecticide which kills lice & mites by
penetrating their chitinous cover & affecting nerves system
 Properties similar to permethrin.
 Cure rate low & resistance seen.
Disadvantage:-
 Lipid soluble CNS toxicity like vertigo, convulsions seen.
 Application similar to permithrin.
 If Combination with benzyl benzoate is more effective.
 Oily liquid with aromatic smell.
 Cure rate 76–100% second application required after 24 hrs.
 Toxicity is low, Application similar to permethrin.
 Use has declined due to skin irritation.
 Contraindication in children because of neurological
symptoms & skin irritation.
 Combination with lindane highly effective.
 Effective scabicide, pediculocide & antipruritic
 Low cure rates
 Better results if applied for twice at 24 hr interval & washed
off days after that
 Less irritation & toxicity
 May be preferred in children as second choice
 Scabicide, weak pediculocide, antiseptic, fungicide & keratolytic.
 These is dissolve cuticle of itch mite and kill it.
 Scrubbing bath (open burrows) ointment is massaged over body
(below the neck) for 3 consecutive days
Disadvantages:
 (a) Treatment is messy.
 (b) Produces bad odour—socially unacceptable
 (c) Repeated applications are required.
 Popular insecticide for mosquitoes, flies and other pests.
 Used in dust or watery suspension form
 Pediculosis & scabies 1–2% lotion or ointment is applied &
washed off after 12–24 hours.
 Poorly absorbed through skin cause rashes, muscle
weakness, tremor.
 Very high doses produce convulsions & neurotoxin
 It gets stored in body fat & induces microsomal enzymes.
 Combination with benzyl benzoate is more effective.
 Anti helminthic drug which has been recently found
effective against scabies & pediculosis.
 A single 0.2 mg/kg ( 12mg in adults)
 Has 91- 100 % cure rate.
 Contra indicated in children 5yrs, pregnant & lactating
women.
antiseptic and disinftive

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antiseptic and disinftive

  • 1. Dr. Manoj Kumar Assistant Prof. Pharmacology AMCH Ambala cant
  • 2.  Are anti-infective substances  Which are use on the skin & mucous membrane or on inanimate object.  To reduce or kill microorganisms.  They are non-selective & some of them are toxic
  • 3.  These are the substances or medium by removing or killing all micro-organisms including vegetative form of bacteria, viruses, fungii, spores, parasite  Which are present every where responsible for contamination and infection.
  • 4.  Destruction or inhibition of growth of all pathogenic organisms (bacteria, viruses, fungii) on non living surfaces  But not the spores on the surface or any medium  If spores are also killed process is Sterlization
  • 5.  These are substances which inhibit the growth or kill micro-organisms on living surfaces such as skin & mucous membrane. It prevent tissue infection
  • 6. Good antiseptic/disinfectant 1. Rapid acting 2. Chemically stable 3. Cheap & Cidal 4. Non staining & good odour 5. Active against all pathogens 6. Active in presence of pus, blood & exudates 7. Non irritating to tissues / non corrosive 8. Non absorbable 9. Non sensitizing (no allergy)
  • 7.  Oxidation of bacterial protoplasm – Potassium permagnate, H202, Halogens  Co-agulation (denaturation) of bacterial proteins & disrupt cell membrane – Phenols, chlorhexidine, alcohols, aldehydes  Detergent like action ↑ permeability of bacterial cell membrane – Cetrimide, soaps
  • 8.  Phenol derivatives: – phenol, cresol, hexachlorophene, chlorohexylenol (dettol)  Alcohols: – Ethanol, Isopropanol  Aldehyde: – Formaldehyde , Glutaraldehyde  Oxidizing agents:– Hydrogen peroxide, potassium per magnate.  Acids: – Acetic acid, boric acid, benzoic acid, salicylic acid  Halogens:– Iodine, chlorine, chlorophores.  Metallic salt: – Mercuric compounds, silver nitrate, zinc sulphate, zinc oxide  Biguanides:– Chlorhexidine.  Dyes: – Gentian violet, acriflavine, proflavine  Quaternary ammonium:– Cetrimide.
  • 9.  Earliest used antiseptic & germicides  At 0.2% cidal activity  Protoplasmic poison, injures microbes, tissues & cells at high conc causes skin burn  MOA: – denaturizing bacterial proteins & disrupting bacterial cell membrane  USES : – disinfect urine, faeces, pus, sputam, burns.  Extremely irritating & mild local anaesthetic action
  • 10.  Methyl Derivative of phenol, less damaging to tissues than phenol.  3-10 times more active  Used for disinfection of utensils, excreta & washing hands.
  • 11.  Phenol derivative  Does not co-agulate proteins,  Non corrosive, Non irritating to skin  Poorly water soluble  Commercial used 4.8 % solution for surgical antisepsis  Skin cream & soap: 0.8%  Mouth wash 1%
  • 12.  Chlorinated phenol act by inhibiting enzymes  Causing bacterial lysis.  Commonly use in soap  Effectively only against Gm+ve  Slow but persistant action  >2% preparations banned
  • 13.  Potassium permagnate: – Purple crystals, highly water soluble,  Liberates oxygen which oxidizes bacterial protoplasm.  Used for gargling, irrigating wounds, urethra (condy's lotion diluted solution of 1:4000 to 1:10,000 )  High conc cause burns & blistering  It is also used to disinfect water in ponds.  Stomach wash in alkaloidal poisoning
  • 14.  Hydrogen Peroxide: – liberates nascent oxygen which oxidizes necrotic matter & bacteria.  Helps in loosening & removing slough, ear wax etc.  Benzoyl Peroxide: – Widely used drug for acne.  liberates O2 in presence of water which kills bacteria, specially anaerobes
  • 15.  Iodine,  Iodophores  Chlorine  Chlorophores
  • 16.  Rapidly acting broad spectrum (bacteria, fungi, virus)  Acts by iodinating and oxidizing microbial protoplasm.  1:20000 solution kill most vegetative forms even bacterial spores are kill with higher concentration/longer action  Used on cuts, degerming skin before surgery, treat ring worm.  Adverse effect: cause burns & blisters
  • 17.  Known as povidine iodine.  Non toxic, nonirritating, non staining prolonged germicidal action.  Used on boils, furunculosis, burns, ulcers, tinea, disinfecting endoscopes & surgical instruments, surgical scrubbing, non specific vaginitis.
  • 18.  Rapid action and Potent germicide 0.1 to 0.25 ppm kill most pathogens.  Kills pathogens in 30 sec.  Used to disinfect urban water supplies.  More active in acidic or neutral medium
  • 19. (1) Chlorinated lime (bleaching powder) – obtained by action of chlorine on lime. – used to disinfect drinking water & swimming pools (2) Sodium hypochlorite – Powerful disinfectant used in dairies for milk cans. – Too Irritant to be used as antiseptic. – Root canal therapy in dentistry
  • 20.  Chlorhexidine: (Savlon) Acts by disrupting bacterial cell membrane & denaturation of bacterial proteins  Non irritant, more active against gram+ve bacteria.  Used in for surgical scrub, neonatal bath, mouth wash & general skin antiseptic.  Most widely used antiseptic in dentistry 0.12-0.2% oral rinse or 0.5 -1 % tooth paste
  • 21.  Antiseptics cetrimide  Detergents:- Cidal to bacteria, fungi & viruses.  Act by altering permeability of cell membrane  Efficiently remove dirt and grease  Widely used as antiseptics & disinfectants for surgical instruments, gloves etc  Combined with chlorhexidine (savlon)
  • 22.  Anionic detergents  Weak antiseptics with cleansing action  Washing with soap & warm water one of the most effective methods of preventing disease transmission  Affect only Gm+ bacteria
  • 23.  Ethanol – Antiseptic, cleansing agent at 40-90% conc.  Act by precipating bacterial proteins  Recommended for decontamination of hands in the health care & personal hygiene  Irritant, should not be applied on mucous membrane, ulcers  Open wounds produce burning sensation .
  • 24.  Used for fumigation.  37 % aqueous solution called as formalin.  Protoplasmic poison , denaturants proteins.  Used for preserving dead tissues.  Use as antiseptic restricted due to bad odour & irritation  Glutaraldehyde :- is a better sterlizing agent  Broad spectrum activity against bacteria, fungi & viruses
  • 25.  Boric acid :- weak antiseptic , bacteriostatic.  Used for mouth wash, irrigation eyes,  Boroglycerine pant use stomatitis and glossitis.  Adverse effect: systemic absorption cause vomiting, abdominal pain diarrhoea, visual disturbance & kidney damage.
  • 26. SILVER COMPOUNDS  Silver sulphadiazine :- is active against pseudomonas seen in burns patient.  Silver nitrate :- rapidly kill & highly active against gonococci - 1% solution used ZINC COMPOUNDS  Zinc Salts:- used as eye wash, ear drops, acne.  Calamine and zinc sulfate:- Mild antiseptic, insoluble
  • 27. Gentian violet:- Active against (gram + ve), bacteria, fungi  Used on chronic ulcers, furunculosis, bed sores, ring worms infected, eczema. Acriflavine and proflavine:-  Active against gram +ve bacteria & gonocci  Suitable for chronic ulcers & wounds  Do not retard healing, non irritant
  • 28.  These are drugs used to kill parasites that live on body surfaces  Lice → cause pediculosis (hair infection)  Mites → cause scabies(skin infection)
  • 29. (1) PERMETHRIN (2) LINDANE (3) BENZYL BENZOATE (4) IVERMECTIN (5) CROTAMITON (6) SULFUR (7) DICOPHANE (DDT)
  • 30.  Broad spectrum causes neurological paralysis in insects.  100 % cure rate nearly  Single application needed in most cases.  Few patients experience itching ,burning.  first drug of choice for scabies & pediculosis. Scabies: apply all over the body except face & head . Wash after 8- 12 hrs. Head lice:- massage about 30 g in to scalp & wash after 10 min.
  • 31.  Broad spectrum insecticide which kills lice & mites by penetrating their chitinous cover & affecting nerves system  Properties similar to permethrin.  Cure rate low & resistance seen. Disadvantage:-  Lipid soluble CNS toxicity like vertigo, convulsions seen.  Application similar to permithrin.  If Combination with benzyl benzoate is more effective.
  • 32.  Oily liquid with aromatic smell.  Cure rate 76–100% second application required after 24 hrs.  Toxicity is low, Application similar to permethrin.  Use has declined due to skin irritation.  Contraindication in children because of neurological symptoms & skin irritation.  Combination with lindane highly effective.
  • 33.  Effective scabicide, pediculocide & antipruritic  Low cure rates  Better results if applied for twice at 24 hr interval & washed off days after that  Less irritation & toxicity  May be preferred in children as second choice
  • 34.  Scabicide, weak pediculocide, antiseptic, fungicide & keratolytic.  These is dissolve cuticle of itch mite and kill it.  Scrubbing bath (open burrows) ointment is massaged over body (below the neck) for 3 consecutive days Disadvantages:  (a) Treatment is messy.  (b) Produces bad odour—socially unacceptable  (c) Repeated applications are required.
  • 35.  Popular insecticide for mosquitoes, flies and other pests.  Used in dust or watery suspension form  Pediculosis & scabies 1–2% lotion or ointment is applied & washed off after 12–24 hours.  Poorly absorbed through skin cause rashes, muscle weakness, tremor.  Very high doses produce convulsions & neurotoxin  It gets stored in body fat & induces microsomal enzymes.  Combination with benzyl benzoate is more effective.
  • 36.  Anti helminthic drug which has been recently found effective against scabies & pediculosis.  A single 0.2 mg/kg ( 12mg in adults)  Has 91- 100 % cure rate.  Contra indicated in children 5yrs, pregnant & lactating women.