Posts Tagged ‘deep vein thrombosis’

phenazocine A synthetic morphine-like analgesic, with similar properties and uses, but with a more rapid and prolonged action. It is of value in biliary colic, as it is less likely to cause a rise in biliary pressure. Dose: 20-30 ing daily, orally or subling tially, although single doses as high as 20 mg are sometimes given. The side-effects are similar to those of morphine and related drugs, but sedation and the risk of dependence is less. (Narphen).
I Phe
Dose: oo- 180 ing daily, at night, adjusted lo need and response. In severe conditions, doses of 50-200 mg may be given by i.m. or i.v. injection. Side-effects include drowsiness and skin reactions. In the elderly it may cause confusion, and paradoxically it may give rise to hyperkinesia in some children. See page 136 and Table 15.
phenol Once widely used as a general antiseptic. Weak solutions relieve itching, and phenol is present in Calamine Lotion. A 5% solution in almond oil is used for the iniection treatment of haemorrhoids.
phenelzine A monoamine oxidase inhibitor, used in the treatment of depression. Dose: 45-60 ing daily, according to need and response. It has many side-effects, including dizziness. dry mouth and blurred vision. Very severe hypertension has been precipitated by some foods, notably clicese. Care is necessary in cardiovascular disease and epilepsy. It may also potentiate the action of other drugs on the central nervous system. (Nardil). See monoamine oxidase inhibitors, Page 128 and’I'able 11.
phenindamine An antihistamine ofinedium potency. It differs from most antihistamines in having a mild central stimulant action, and so rarely causes drowsiness.
Dose: 75-200 ing daily. IThephorin). See page I 10 and Table 2.
phenindione An orally active anticoagu last used in the control of deep-vein thrombosis.
Dose: 200 mg initially; maintenance, 25-100 mg daily, depending on laboratory reports of the prothrombin time. Side- effects include hypersensitivity reactions and haemorrhage. Patients should be warned that the drug may colour the urine. Phenindione has now been largely replaced by %varlarill, (Dindevan).
pheniramine An antihistamine similar to but less potent than chlorpheniramine. Dose: 150 ing daily. (Daneral SA). See page 110 and Table 2.
tphenobarbitone A powerful sedative, hypnotic and anticonvulsant drug. It is mainly of value in epilepsy, as it is effective in most types of seizure except petit mil (absence seizures).
phenolphthalein A synthetic laxative. It is sometimes given with emulsion of liquid paraffin.
Dose: 50-100 mg daily. It may occasion alit/ cause a rash, and its use has declined.
tphenoperidine A narcotic analgesic, often used in association with droperidol in neuroleptanalgesia. It is also used as a supplementary analgesic in general anaesthesia.
Dose: 0.5-1 mg i.v. with subsequent doses as required. It may cause respiratory depression, which can be controlled by doxapram or naloxone. (Operidine).
phenothrin An insecticide used as 0.2% lotion for head and crab lice. (Fill] Marks).
phenoxybenzamine An alpha-adrenoceptor blocking agent used in the severe, episodic hypertension associated with phaeochroniocytoma.
Dose: orally and by injection, 10–20 mg according to need and response. Side-effects include dizziness and tachycardia; rapid and marked hypotension after injection. (Dibenyline).
phenoxymethylpenicillin An orally active, acid-stable penicillin, also known as penicillin V. It is used mainly in respiratory infections in children, in tonsillitis, and to supplement injection treatment. It is not suitable for use in severe infections. Dose: I - 2 g daily, before food. Doses of .500 mg daily are given in rheumatic fever and pneumococcal prophylaxis.
tphentermine An appetite depressant given ill the short-term treatment of obesity. Dose: 13–30 mg before breakfast. (DUramine: lonamin).

phentolamine An alpha-adrenoceptor blocking agent that can temporarily reverse the vasoconstrictive action of adrenaline and noradrenaline. It is used mainly in the diagnosis and control of the episodic hypertension of phaeochromocy- toma, and during surgical removal of the tumour.
Dose: 2-5 ing i.v. repeated as required. Side-effects are tachycardia, hypotension, dizziness, nausea and diarrhoea. (Rogitine).
phenylbutazone A powerful, non-steroidal anti-inflammatory agent, formerly used in the treatment of rheumatic and arthritic conditions. Because of blood dyscrasias, which may occur suddenly, the drug is now used only for the treatment of ankylosing spondylitis under hospital supervision.
Dose: 400-600 mg daily. (Butacote). See page 165 and Table 29.
phenylephrine A vasoconstrictor similar to .”Irvildlille, but less toxic. Given in acute hypotensive states.
Dose: 5 mg by i.m. injection, or 100-500 pg by slow i.v. injection. Sometimes valuable in paroxysmal atrial tachycardia. It is also used locally as 1:400 solution as nasal decongestive, and as eye drops, 2.5-100/6.
phenylpropanolamine A sympatho11111lictic agent used with other drugs in preparations for the symptomatic relief of nasal congestion.
phenytoin An anticonvulsant used in all forms of epilepsy with the exception of petit mil (absence seizures). It has little hypnotic effect and combined treatment with phenobarbitone may evoke the best response.
Dose: 150-600 mg daily with or after food. In status epilepticus it is given under ECG control in doses of 10-15 mg/kg by slow i.v. injection. It is also given to control ventricular tachycardiac in doses of 3.5-5 mg/kg by slow i.v. injection via a cavil catheter. The side-effects of
extended treatment are numerous, and include rash, dizziness, blood dyscrasias, hirsutism and gingival hypertrophy. (Epanutin). See page 136 and Table 15.
pholcodine A cough centre depressant resembling codeine, but it lacks any analgesic properties. It is present in a range of
products used for the relief of useless cough, and has the advantage over codeine of not causing constipation.
Dose: 10-60 mg daily.
physostigmine A plant alkaloid, also known as eserine, once used as a miotic (0.25-1%) to counteract the effects of atropine.
phytomenadione Vitamin K,. The form of vitamin K used in the prophylaxis and treatment of neonatal haemorrhage due to vitamin K deficiency.
Dose: I mg by i.m. injection. It is also of value in the haemorrhage due to overdose of oral anticoagulants. Dose: 10-40 mg by slow i.v. injection. In less severe condi-
tions, 10-20 mg orally, according to the base-line prothrombin time. (Konakion).
pilocarpine A plant alkaloid with a miotic action similar to, but less intense than that of physostigmine.
Dose: in glaucoma as eye drops of 0.5-41!4,, 3-6 times a day. Occasionally given in doses of 15-30 mg daily with food to reduce the dry mouth associated with irradiation of the head and neck.
(Salagen). See page 138 and Table 16.
pimozide A tranquillizer with the actions and uses of chlorpromazine. It is used mainly in the treatment of schizophrenia, as it reduces the delusions without causing drowsiness.
Dose: 10 mg daily initially, adjusted up to a maximum of 20 ing daily, with maintenance doses according to response.
Similar doses are given in mania and psycho-motor agitation. The side-effects are similar to those of chlorpromazine. (Orap). See page 168 and Table 30.
pindotol A beta-receptor blocking agent, with actions and uses similar to those of propranolol. Less likely to cause bronchospasm.
Dose: 7.5-15 nig daily. (Visken). See page 148 and Table 2l.
piperacillin A semi-synthetic penicillin with a wide range of activity that extends to Pseudomonas and anaerobes. It call be used in association with other antibiotics in life-threatening and multiple infections. Dose: in severe infections, 200-300mg/kg daily by i.m. or slow i.v. injection or infusion, increased in life-threatening infections to 16g daily. In less severe infections, 100-150ing/ki; i.m. daily, with a maximum single dose of 2g. (Pipril). Sometimes given with the beta-lactamase inhibitor tazobactam as the mixed product Tazocin.
piperazine An effective anthelmintic against threadworms and roundworms. Dose: 2-4 years, 750 ing; 5-12 years, 1.5 g; in children over 12 years and in adults, 2 g; as a single daily dose for 7 days, repeated if necessary after I week. For roundworm, a single dose of 4 g is given, but as the worms are narcotized, and not killed, a purgative is necessary to ensure expulsion. Side-effects are nausea, diarrhoea and occasional dizziness. Care is necessary in renal impairment, epilepsy and psychiatric conditions.
I Pot
Dose: 1.5-3 nig daily. Side-effects include drowsiness, nausea, dizziness and weight gain. (Sanomigran). See page 154 and Table 23.
podophyllum resin A plant extract used topically as a paint (0.5-25% in alcohol) for anogenital and plantar warts. It is very irritant to normal tissues, and its use requires care. (Condyline; Warticon).
polygellne A modified gelatin, used with sodium chloride and other electrolytes as a [)food volume expander.
Dose: 500-1000 ml by i.v. infusion. (1-lacniaccel).
polynnyxin 8 An antibiotic used by local application for infections of the car, eye and skin. It is too toxic for systemic use.
pipothiazine A chlorpromazine-like drug, with similar uses and side-effects, but given mainly as a depot preparation for the maintenance treatment ofschizophreiiiii. Dose: Wier a test dose of 25 mg) 50-IMnig by deep i.m. injection every 4 weeks, increased if necessary up to a maximum of 200 mg per dose. (Piportil Depot)• See page 168 and Table 30.
piracetamV A new drug used for the treatment of the spasmodic condition cortical myoclonus.
Dose: 7-20 g daily. Side-effects include diarrhoea, nervousness and rash. (Nootropil).
piroxicam A non-steroidal anti-inflammatory agent (NSAID) with all extended action, and used in arthritis, spondylitis, gout and musculoskeletal disorders. Dose: 20-30 mg daily; up to 40 ring daily in gout and other acute conditions. It is also used for local application as a 3% gel. As with related drugs, side-effects include gastrointestinal disturbances of varying severity, especially with higher doses. Weldene). See page 165 and Table 29.
pivampicillin A derivative of ampicillin, with similar actions and uses. Is hydrolyzed to ampicillin after absorption, but gives higher blood levels. Much is excreted in the urine, so it is of value in urinary infections. Dose: I -2 g daily. (Pondocillin).
pizotifen A serotonin antagonist used in the prophylaxis of migraine, and vascular headache.
polymyxin E See colistin.
polystyrene resin An ion-exchange resin [or the removal of potassium in
conditions associated with hyperkalaemia, as in oliguria and anuria.
Dose: 15 g 3•4 times a day according to the plasma level of potassium. When the drug is not tolerated orally, 30 g daily as a suspension may be given per rectum. Care is required in renal or hepatic impairment. (Resonium).
polythiazide A potent diuretic with the action, uses and side-effects of the thiazide diuretics but effective in the low dose of 1-4 ing daily. (Nephril).
poractant A lung surfactant used in the respiratory distress syndrome of premature infants. It is given by endotracheal tubing with mechanical ventilation.
(Curosurf).
potassium One of the most important ions of the body, mainly present in intracellular fluid. Many diuretics increase loss of potassium as well as sodium; with extended
treatment the potassium balance may be disturbed, with acute muscle weakness, cardiac arrhythmias, and an increased sensitivity to digitalis. Potassium loss can 1-w treated with potassium chloride orally (often as Slow-K, but may cause peptic ulceration), or by effervescent potassium tablets. Mixed diuretic and potassium products are also available.

halothane A potent non-inflammable inhalation anaesthetic. It suppresses mucous and bronchial secretions, and reduces capillary bleeding. It has sonic muscle-relaxant properties, but in major surgery, supplementary treatment with a muscle relaxant is necessary. Halothane may cause some cardiac irregularities, but an occasional serious side-effect is severe hepatotoxicity, particularly after further exposure to the drug within periods of 441 weeks. Such susceptibility cannot yet be detected, so great care is necessary in any cases of liver dysfunction.
(Fluothane).
hamamelis An extract of witch hazel leaves referred to as harnarnelis or witch hazel water is used as a soothing application for bruises and sprains.
Hartmann’s solution An electrolyte-replacement solution containing sodium lactate, sodium chloride, potassium chloride and calcium chloride.
heparin The natural anticoagulant obtained front lung and liver tissue. It is widely used in deep-vein thrombosis and pulmonary embolism.
Dose: by i.v. injection 5000 units initially, followed by 1000-2000 units hourly by i.v. infusion, or 15000 units by s.c. injection 12-hourly under laboratory control. Prophylactic dose before surgery 5000 units, then 5000 units every 8-12 hours for 7 days. Overdosage call be controlled by the i.v. injection of prolamine sulphate. Treatment with heparin may be combined with that of oral anticoagulants such as phenindione or warfarin to provide immediate action before the slow-acting oral drugs begin to take effect. Occasional side-effects include hypersensitivity reactions and alopecia. Heparin is a complex polysaccharide, but certain fragments of that large molecule retain sonic anticoagulant activity, and are referred to as low molecular weight heparins. They are used mainly in the prophylaxis of venous thrombo-embolism, as they have a longer
action than standard heparin. They are given by once-daily s.c. injection, and laboratory control of the bleeding time is not necessary. The dose varies to some extent with the product used.
hepatitis A & 8 vaccines Inactivated hepatitis virus antigens for the protection of individuals highly exposed to the infections. Dose: see data sheets. (I iaverix A;
kncigix B; II–B–Vax).
theroin See diamorphine.
hetastarch A soluble modified starch that is used as a 6% solution with 0.9% sodium chloride as a plasma volume expander. Dose: 500-1500 nil daily by i.v. infusion, up to a maximum of 20 mltkg daily. It is excreted by the kidneys, and care must be taken to avoid circulatory overload. Not for use in congestive heart failure or renal insufficiency. Side-effects are vomiting, chills, fever and urticaria. (clol-IAES; Hespan).
hexachlorophene A slow-acting antiseptic used for skin sterilization, and present in sonic medicated soaps.
hexamine (methenamine) A formaldehyde derivative of low toxicity, occasionally used as a urinary antiseptic. Dose: 2 g daily. It is usually given as hexamine hippurate to ensure the necessary acidification ol’the urine. (Iliprex).
histamine A compound present in a bound form in all mammalian tissues; its release is probably the ultimate cause of many allergic conditions.
histamine H,-receptor antagonists See antihistamines. See page 110 and Table 2.
histamine Hz -receptor antagonists Drugs that (litter from conventional antihistamines in having a selective blocking action on receptors ill the gastric cells that secrete acid. They are widely used in the treatment of peptic ulcer and other conditions requiring a reduction in gastric acid secretion. See page 162 and Table 27.
homatropine An atropine derivative with a similar but more rapid mydriatic action (15-30 minutes), but a shorter duration of effect of about 24 hours. Eye drops
(1-2%) sometimes with cocaine.

hyaluronidase A ’spreading’ factor used to increase the absorption of large-volume s.c. injections. The injection of 1500 units of hyaluronidase, either into the injection site or mixed with the injection fluid, will promote the absorption of 500-1000 mL of electrolyte solution by s.c. drip infusion. (Hyalase).
hydralazine A vasodilator that is useful in the supplementary treatment of hypertension.
Dose: 50- 100 nig daily, usually with a IlliaUide diuretic or a beta-blocking agent. Also given in hypertensive crisis by slots, i.v. injection in doses of 5-10 mg; over-rapid injection may cause a marked fall in blood pressure. Side-effects are nausea, tachycardia and fluid retention (less likely with low doses), but a lupus erythematOSLIS- like syndromemay occur with extended high-dose therapy. (Apresoline). See page 148 and “Fable 21.
hydrochlorothiazide A thiazide diuretic that brings about it marked increase in the excretion of salts and water, and is of value in congestive heart failure and other oedematous conditions. It is also of value iii    as it reduces peripheral resistance, and potentiates the action of some other antihypertensive drugs.
Dose: 50-111(1 Ing daily initially in
oedenia; maintenance dose 25-50 mg daily or oil alternate days. III hypertension, 25-30 Ing daily according to need.
I lydrochlorolhiazidc, like other thiazid”, Increases the excretion of potassium as well as sodium, and in extended treatment supplementary treatment with potassium chloride or effervescent potassium tablets may be required. Side-effects include nausea, rash, dizziness and photosensitivity. (I lydroSaluric). See page 148
and ‘I able 21.
acute lyniphoblastic leukaemia and some lymphomas. In common with some other corticosteroids, hydrocortisone inhibits organ-transplant rejection and in high doses it is given to control incipient rejection.
Dose: varies considerably according to need: for replacement therapy, 20-30 mg daily: in shock, 100-300 mg or more by slow i.v. injection, repeated as required. Side-effects are numerous and include hypertension, oedema, mental disturbances, re-activation of peptic ulcer, muscle weakness and diabetes. Cushing’s syndrome may occur with high doses.
I I ydrocortisone, unlike cortisone, is active topically, in(] is used as eye drops 0.3% (usually with an antibiotic), ointment and cream (0.50/o and 11M, often with an antibiotic to control any secondary infection.
hydroflumethiazide A thiazide diuretic N,ith the actions, uses and side-effects of bendrofluazide.
Dose: 25- 100 nig daily in (lie morning; 25-50 Ing daily in hypertension.
ff lydrenox). See page 148.
hydrogen peroxide solution It contains 5-7% of H 02
, equivalent to about 20 volumes oJ oxygen. It has antiseptic and deodorizing properties, and is used mainly for cleaning wounds. It is also used as a mouthwash (diluted 1:7), and as ear drops (1:4 in water or 501% alcohol).
thydromorphone A potent opioid analgesic of the morphine type. Dose: in severe pain 1.3-2.6 Ing 4 t,-hourly. Walladone).
hydrotalcite Aluminium magnesium hydroxide carbonate. An antacid used in dyspepsia and related conditions.
Dose: I g as required.
55
hydrocortisone The principal corticosteroid, also known as cortisol, that is secreted by the adrenal cortex. It plays a major role in the metabolism of glucose, protein and calcium, in maintaining the electrolyte balance, and in reducing inflammatory and allergic responses. It is used in all cases of adrenocortical insufficiency, including Addison’s disease and after adrenalectomy. It is also used in anaphylactic shock, asthma, rheumatoid disease and allergic states. It is valuable in
hydroxocobalamin A derivative of eydnu,obdlaniin, and now the preferred form of vitamin B,, as it has a more prolonged action.
Dose: in pernicious anaemia and other vitamin 13, deficiency states, I Ing initially ian. repeated 5 times at intervals of 2-3 days; maintenance dose 1 mg by I’ll’
by )CC- Lion every 3 months. It is also given
prophylactically after total gastrectonly. (Cobalin-H; NCO-Cytalliell). See
page 112.

hydroxyapatite A natural substance with a mineral composition somewhat similar to that of bone. It is used as a source of calcium and phosphorus in osteoporosis and other deficiency states. Tablets of 830 mg are available. (Ossopan).
hypermotility of the gastrointestinal tract, and may be useful in spasmodic dysmenorrhoea.
Dose: 40-80 mg daily; in acute spasm, .10 mg by injection. (Buscopan).
hydroxychloroquine An antimalarial with the actions, uses and side-effects of chloroquine. It is also useful in rheumatoid arthritis in doses of 200-400mg daily, and in lupus erythematosus, but side-effects are numerous, and treatment requires expert supervision. (Plaquenil). See page 165.
hypromellose A cellulose-derivative that dissolves in water to form a viscid, colloidal solution. Such a solution is used as a base for eye drops to extend the action of a dissolved ophthalmic drug; to lubricate contact lenses; and to act as a lubricant in chronic, sore eye conditions.
5-hydroxytryptamine See serotonin.
hydroxurea (hydrocarbamide) A cytotoxic agent sometimes used in chronic myeloid leukaemia.
Dose: 20- 30 mg/kg as a single dose daily or 80 nig/kg every third day. Side-effects are nausea, skin reactions and myelo- suppression. (Hydrea). See page 122 and Table 8.
hydroxyzine A mild tranquillizer with some sedative and antihistaminic properties. It is given in the short-term treatment of anxiety, and in pruritus and dermatoses complicated by emotional tension. Dose: 50-400 mg daily. It has the side-effects of the antihistamines, and is not recommended where some sedation is undesirable. (Atarax; Ucerax). See page 117 and Table 3.
hyoscine (scopolamine) An alkaloid obtained from plants of the belladonna group. It is a powerful hypnotic and is widely used together with papaveretum for premedication before anaesthesia in doses of 300-600 pg by s.c. or i.m. injection. It has some antiemetic properties, and is useful in travel sickness and vertigo. Dose: 300 mg 30 minutes before starting the iourney, followed by up to 3 doses 6-hourly. Scopoderm is a patch of 500 pg. Thc side-effects of mouth dryness and dizziness are those of the anticholinergic drugs generally. It is contraindicated in glaucoma. It is used occasionally in terminal care for bowel colic and excessive respiratory secretions. Dose: 600 pg-2.4 mg daily by s.c. infusion.
hyoscine butylbromide A derivative of hyoscine that differs in lacking any central action. It is given in spasm and
I
ibuprofen A non-steroidal anti-inflammatory agent (NSAID) widely used in rheumatoid and arthritic conditions. It is also given as an analgesic for mild to moderate pain, but not for acute gout. Dose: 1.8 g daily initially; lly; maintenance duos, 600 lllg-L2 daily after food. A 5% cream is available for local use. The sideeflicts are those of the NSAID& generally. (BrUlen; Feribid). See page 165.
ichthammol A thick, dark brown liquid with a characteristic odour, derived from certain bituminous oils. It is a mild antiseptic and is used mainly in chronic eczema as a 100A, ointment or zinc paste. A solution (10% in glycerin) has been used oil ulcers and inflamed areas.
idarubicin A potent cytotoxic agent similar in actions and uses to doxorubicin. It is given orally and i.v. in acute nonlymphocytic leukaemia, breast cancer, and as second-line therapy in acute lymphatic leukaemia. Dose is based on skin area. (Zavedos). See page 122 and Table 8.
idoxuridine An antiviral agent now virtually superseded by acyclovir and related drugs. Used occasionally in herpes zoster skin infection by local application of a 5% solution. See page 144 and Table 19.

fosfamide A derivative of cyclophosphamide with similar actions and uses. It is effective in lung, ovary, breast and soft-tissue tumours, as well as some malignant lymphomas.