Malathion is an organophosphorous compound that inhibits cholinesterase enzyme activity. Malathion contains an interesting phosphinothioyl-thio ester as its active moiety where modification of acetylcholinesterase occurs. The action of Malathion on acetylcholinesterase has been correlated to prolonged modulation of the functioning of the cutaneous vasculature. Malathion is an organophosphate insecticide of relatively low human toxicity.

Lumefantrine, also known as HSDB 7210, is an antimalarial agent used to treat acute uncomplicated malaria. It is administered in combination with artemether for improved efficacy. This combination therapy exerts its effects against the erythrocytic stages of Plasmodium spp. and may be used to treat infections caused by P. falciparum and unidentified Plasmodium species, including infections acquired in chloroquine-resistant areas.

Lofexidine Hydrochloride is an alpha2-adrenergic receptor agonist that is structurally related to Clonidine and used in the treatment of opioid withdrawal symptoms as well as an anihypertensive. It can be used as a short acting anti-hypertensive.

Lisuride maleate is an ergot derivative that acts as an agonist at dopamine D2 receptors, a dopamine agonist. It may also act as an antagonist at dopamine D1 receptors, and as an agonist at some serotonin receptors. It displays high affinity for D2, D3 and D4 receptors along with 5-HT1A. Lisuride maleate is also known as an anti-Parkinson's agent.

Lindane is an organochlorine chemical variant of hexachlorocyclohexane that has been used both as an agricultural insecticide and as a pharmaceutical treatment for lice and scabies. Lindane is a neurotoxin that interferes with GABA neurotransmitter function by interacting with the GABAA receptor-chloride channel complex at the picrotoxin binding site. In humans, lindane affects the nervous system, liver and kidneys, and may well be a carcinogen. It is unclear whether lindane is an endocrine disruptor.

Levobunolol is a non-selective beta blocker. It is used topically to manage glaucoma.

Labetalol is a mixed alpha/beta adrenergic antagonist that is used to treat high blood pressure. It can be given intravenously in severe hypertensive situations, or by mouth for long term hypertension management. Studies suggest that the pharmacokinetics of labetalol are significantly affected by the common CYP2C19 polymorphisms.

Ketorolac or ketorolac tromethamine is a non-steroidal anti-inflammatory drug (NSAID) in the family of heterocyclic acetic acid derivatives, used as an analgesic. It acts by inhibiting the bodily synthesis of prostaglandins. Ketorolac in its oral (tablet or capsule) and intramuscular (injected) preparations is a racemic mixture of both (S)-(?)-ketorolac, the active isomer, and (R)-(+)-ketorolac. An ophthalmic solution of ketorolac is also used to treat eye pain and to relieve the itchiness and burning of seasonal allergies.

Ketoconazole is a synthetic imidazole antifungal drug used primarily to treat fungal infections. It is sold commercially as a tablet for oral administration (although this use has been discontinued in a number of countries), and in a variety of formulations for topical administration, such as creams (used to treat tinea; cutaneous candidiasis, including candidal paronychia; and pityriasis versicolor) and shampoos (used primarily to treat dandruff—seborrhoeic dermatitis of the scalp).

Isopropamide (R5) is a long-acting anticholinergic drug. It is used in the treatment of peptic ulcers and other gastrointestinal disorders involving hyperacidity (gastrointestinal acidosis) and hypermotility. Chemically, it contains a quaternary ammonium group. It is most often provided as an iodide salt, but is also available as a bromide or chloride salt.

Iohexol is a contrast agent. The osmolality of iohexol ranges from 322 mOsm/kg—approximately 1.1 times that of blood plasma—to 844 mOsm/kg, almost three times that of blood. Despite this difference, iohexol is still considered a low-osmolality contrast agent. The osmolality of older agents, such as diatrizoate, may be more than twice as high.

Iodixanol is a contrast agent. It is commonly used as a contrast agent during coronary angiography. It is the only iso-osmolar contrast agent, with an osmolality of 290 mOsm/kg H2O—the same as blood.

Imipramine, sold as Tofranil and also known as melipramine, is a tricyclic antidepressant (TCA) of the dibenzazepine group. Imipramine is mainly used in the treatment of major depression and enuresis (inability to control urination).

Imipenem is an intravenous β-lactam antibiotic discovered by Merck scientists Burton Christensen, William Leanza, and Kenneth Wildonger in 1980. It was the first member of the carbapenem class of antibiotics. Carbapenems are highly resistant to the β-lactamase enzymes produced by many multiple drug-resistant Gram-negative bacteria, and thus play a key role in the treatment of infections not readily treated with other antibiotics.

Iloprost is a drug used to treat pulmonary arterial hypertension (PAH), scleroderma, Raynaud's phenomenon and other diseases in which the blood vessels are constricted and blood can't flow to the tissues. This damages the tissues and causes high blood pressure. Iloprost works by opening (dilating) the blood vessels to allow the blood to flow through again. Note: This product is supplied as acetone solution (10 mg /mL)

Icosapent is a synthetic derivative of the omega-3 fatty acid eicosapentaenoic acid (EPA). A diet rich in eicosapentaenoic acid lowers serum lipid concentration, reduces incidence of cardiovascular disorders, prevents platelet aggregation, and inhibits arachidonic acid conversion into the thromboxane-2 and prostaglandin-2 families.

Hydroxyzine dihydrochloride is a histamine H1 receptor antagonist that is effective in the treatment of chronic urticaria, dermatitis, and histamine-mediated pruritus. Unlike its major metabolite cetirizine, it does cause drowsiness. It is also effective as an antiemetic, for relief of anxiety and tension, and as a sedative.

Hydroflumethiazide is a thiazide diuretic with actions. It is also an anti-hypertensive and a diuretic.The physiologic effect of hydroflumethiazide is by means of increased diuresis.

Homatropine Methylbromide is a quaternary ammonium salt of methylhomatropine. It is a peripherally acting anticholinergic medication that inhibits muscarinic acetylcholine receptors and thus the parasympathetic nervous system. It does not cross the blood–brain barrier. It is used to effectively relieve intestinal spasms and abdominal cramps, without producing the adverse effects of less specific anticholinergics. It is used, in addition to papaverine, as component of mild drugs that help "flush" the bile.

Hexafluronium bromide is a neuromuscular blocking agent used in anesthesiology to prolong and potentiate the skeletal muscle relaxing action of suxamethonium during surgery. It is known to bind and block the activity of plasma cholinesterases. Hexafluronium acts as a nicotinic acetylcholine receptor antagonist.

Hetacillin is a beta-lactam antibiotic that is part of the aminopenicillin family. Hetacillin is a prodrug that is converted to ampicillin via esterases. Ampicillin binds to inactivated penicillin-binding proteins (PBPs) located on the inner membrane of the bacterial cell wall. PBPs, including transpeptidases, carboxypeptidases, and endopeptidases, participate in the terminal stages of assembling the bacterial cell wall and in reshaping the cell wall during growth and division. It is a prodrug and it has no antibacterial activity itself but quickly splits of acetone in the human body to form ampicillin, which is active against a variety of bacteria.

Guanethidine sulfate is an antihypertensive agent that inhibits selectively transmission in post-ganglionic adrenergic nerves. It is believed to act mainly by preventing the release of norepinephrine at nerve endings and causes depletion of norepinephrine in peripheral sympathetic nerve terminals as well as in tissues.

Glucosamine (C6H13NO5) is an amino sugar and a prominent precursor in the biochemical synthesis of glycosylated proteins and lipids. Glucosamine is part of the structure of the polysaccharides chitosan and chitin, which compose the exoskeletons of crustaceans and other arthropods, as well as the cell walls of fungi and many higher organisms. Glucosamine is commonly used as a treatment for osteoarthritis, although its acceptance as a medical therapy varies. Since glucosamine is a precursor for glycosaminoglycans, and glycosaminoglycans are a major component of joint cartilage, supplemental glucosamine may help to rebuild cartilage and treat arthritis. (Source: https://en.wikipedia.org/wiki/Glucosamine).

Glisoxepide is a second-generation sulfonylurea with antihyperglycemic activity. Like other second-generation compounds, glisoxepide exerts greater binding affinity than the first-generation compounds. Glisoxepide shows peroxisome proliferator-activated receptor gamma agonistic activity, has a short half-life and is excreted in both the bile and urine.

Ganciclovir Sodium is an acyclovir analog that is a potent inhibitor of the Herpesvirus family including cytomegalovirus. Ganciclovir is used to treat complications from AIDS-associated cytomegalovirus infections.

Gallamine Triethiodide is a mAChR M2 antagonist with pronounced cardioselectivity. It acts by combining with the cholinergic receptor sites in muscle and competitively blocks the transmitter action of acetylcholine. It is a synthetic non-depolarizing blocking drug. The actions of gallamine triethiodide are similar to those of tubocurarine but this agent blocks the cardiac vagus and may cause sinus tachycardia and, occasionally, hypertension and increased cardiac output.

Furazolidone is a nitrofuran antibacterial agent. It is a nitrofuran derivative with antiprotozoal and antibacterial activity. Furazolidone binds bacterial DNA which leads to the gradual inhibition of monoamine oxidase. It is marketed by Roberts Laboratories under the brand name Furoxone and by GlaxoSmithKline as Dependal-M.

Fosphenytoin Sodium is the sodium salt form of fosphenytoin, a prodrug that is hydrolyzed to the anticonvulsant phenytoin. It is an PDE3 (phosphodiesterase 3) inhibitor. Phenytoin exerts its effect most likely through an enhancement of sodium efflux from neurons in the motor cortex. This leads to a suppression of excessive neuronal firing and spread of seizure activity. Other physiologic effects from actions of phenytoin include modulation of the voltage-dependent calcium channels of neurons, inhibition of calcium flux across neuronal membranes and enhancement of sodium-potassium ATPase activity of neurons and glial cells.

Fosinopril Sodium is a phosphinic acid-containing ACE (angiotensin-converting enzyme) inhibitor that is effective in the treatment of hypertension. It is a prodrug that is converted to its active metabolite fosinoprilat.

Fosfomycin trometamine is an antibiotic produced by Streptomyces fradiae.