SYNERGISM
When
the combined effect of two drugs is greater than the algebraic sum of their
individual effects, it is called as synergism. It results in either potentiation of the
action of the drugs or
prolongation of it's therapeutic effects.
Synergism occurs when two
drugs act at different sites or when one drug alters the pharmacokinetics of
the other drug.
Examples - Levodopa and Carbidopa (Carbidopa prevents
peripheral metabolism of Levodopa allowing it's entry in brain in greater
amounts). Other example is - synergistic
combination of antihypertensives like Beta-blockers and diuretics like frusemide (they act at different sites). Another very interesting example is combination of sulfamethoxazole and trimethoprim , if acting individually both of them are bacteriostatic but when in combination (known as Cotrimoxazole) they become bactericidal ( you can read about them in detail in chapters dealing with Antimicrobial agents).
combination of antihypertensives like Beta-blockers and diuretics like frusemide (they act at different sites). Another very interesting example is combination of sulfamethoxazole and trimethoprim , if acting individually both of them are bacteriostatic but when in combination (known as Cotrimoxazole) they become bactericidal ( you can read about them in detail in chapters dealing with Antimicrobial agents).
Regards
Ferruccio Steven | Program Manager | Pharmacology 2020
Larix International Pte Ltd
Contact: +65 31655042
WhatsApp: +65 3158 6820
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