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sodium picosulphate A synthetic laxative similar to bisacodyl, but with a slower action.
Dose: 5-15 rug at night.
sodium stibogluconate An organic antimony drug use([ in the treatment of visceral leishmaniasis or kala-azar.
Dose: 20 ruglkg daily by i.m. or i.v. injection for 30 days. Side-effects include anorexia, vomiting, cough and sub-sternal pain. (Pentostain).
I sta
given by i.v. injection as a 50% solution to promote diuresis and to reduce cerebral oedema.
sotalol A beta-adrenergic blocking agent used ill the treatment of hypertension, angina, cardiac arrhythmias and thyrotoxicosis. Dose: 120 nig initially, increased as required; maintenance, 160-600 ing daily. For prophylaxis after infarction, 320 mg daily. In acute cardiac arrhythmias, 20-60 mg by slow i.v. injection under ECG control. Care is necessary in heart block, asthma, hepatic and renal impairment. (BetaCardone; Sotacor). See pages 114 & 148, and Tables 4 & 2 1.
sodium tetradecyl sulphate A venous-occluding agent used in the injection sclerotherapy of varicose veins.
Dose: 0.5-1 nil at any one site, followed by compression bandaging for sonic weeks. The local irritant action of the drug brings about an occlusive venous fibrosis at the injection site. Extra-vascular injection may cause necrosis. Care is necessary in allergic subjects.
sodium thisulphate A 50% solution is given by i.v. injection in cyanide poisoning. See sodium nitrite and kelocyanor.
sodium valproate An anticonvulsant
effective in most forms of epilepsy.
Dose: 600 mg daily in adults initially, increased if required up to a maximum of 2.5 g daily. It may also be given by slow i.v. injection in doses of,100-800ing, followed by similar doses given by i.v. infusion. Liver function tests before and during treatment are essential. Severe side-effects such as vomiting, drowsiness or jaundice require withdrawal of the drug, as does spontaneous bleeding or bruising.
(Epilim). See page 136 and Table 15.
somatropin A form of human growth hormone obtained by biosynthesis. It is used to stimulate growth in hormone-deficient young patients whilst the epiphyses are still open.
Dose: 0.07 units/kg daily by i.m. or s.c. injection. Subcutaneous injection sites should be varied. (Genotropin; Hurrialrope; Norditropin; Salzen).
spectinomycin An antibiotic used in the treatment of penicillin-resistant gonorrhoea.
Dose: 2-4g by deep Lin. injection. Side-effects include nausea, dizziness and tirlicaria. (Trobicin).
spironolactone An aldosterone antagonist which potentiates the action of thiazide and loop diuretics in sonic resistant conditions. It is of value in the oedema of liver cirrhosis, as well as in the nephrotic syndrome and congestive heart failure. Dose: 100 ing daily up to a maximum dose of 400 mg daily. Side-effects include drowsiness, gastrointestinal disturbances, gynacconiastia and an increased sensitivity to warfarin. The combined use of potassium-sparing diuretics or potassium supplements is contraindicated.
(Aldacione; Spiroctan).
SSRls See selective serotonin re-uptake inhibitors.
stanozolol An anabolic steroid with actions and uses similar to those of nandrolone. Dose: 5 ing daily. It also has fibrinolytic properties, and is used in lipoderinatosclerosis (a complication of deep-vein sclerosis), and in some forms of vasculitis. It may also be of sonic value in hereditary angioneurotic oedema and in the relief of itching due to biliary obstruction. Also used in some aplastic anaemias, 2.5-10 ing daily. Sonic androgenic side-effects may Occur, bill are usually mild and reversible Oil stopping treatment. (Stroniba).
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sorbitol A saccharide that after absorption is converted in the liver almost entirely to laevulose. It has been used as a sugar-substitute in diabetes, and it is sometimes
starch Carbohydrate granules obtained from maize, rice, wheat or potato. Widely used as absorbent dusting powder.

stavudineV An antiviral agent that inhibits the enzyme reverse transcriptase, and so indirectly blocks the synthesis of viral DNA. It is used in HIV infections resistant to or not responding to zidovudine. Dose: 00 ing daily, I hour before food. Side-effects include malaise, peripheral neuropathy and pancreatitis. (Zerit). See page 144 and *['able 19.
sterculia A natural gum that swells in water to a gelatinous mass. It is used as a bulk laxative as when taken with plenty of water it increases faecal volume and promotes peristalsis. It is also used in diverticulitis and irritable bowel syndrome, and as an appetite suppressant. Dose: 5-10g daily but not at night. (Normacol).
Sul
Dose-. I g daily by deep i.m. injection. Its use requires care. as it k both ntotnxir and nephro(oxic, especially in full doses and in renal impairment. Measurement of the plasma concentration QfbErCplU1llV0ll P. advisable during treatment. Cutaneous sensitization has followed contact of the drug trill the skin.
sucralfate An aluminium sucrose sulphate use,] in the treatment ofpeptic ulcer. It is not an antacid, but forms a barrier over the ulcer that is resistant to peptic attack and so promotes healing.
Dose: 4g daily for at least 4 weeks. Antacids should not be taken immediately before or after sucralfate. (Antepsin). See page 162.
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stilboestrol A synthetic oestrogen with the actions and uses of oestradiol.
Dose: 0.1-0.5 mg daily for menopausal symptoms, but it is now prescribed less frequently. Dose in breast cancer, 10-20 mg daily; in prostatic carcinoma, 3 mg daily or more, although fosfestrol is often preferred. Side-effects include nausea, fluid retention, thrombosis, impotence and gynacconlastia.
streptokinase Ali enzyme preparation obtained from cultures of haemolytic streptococci. It has fibrinolytic properties, and is of value in deep vein thrombosis, pulmonary embolism, myocardial infarction and other conditions requiring fibrinolytic therapy.
Dose: by i.v. infusion, 250000 units or more initially, followed by maintenance doses of 100000 units hourly for up to 72 hours. For myocardial infarction
1 5(10000 units over l hour. Side-effects are fever, rash, haemorrhage and allergic reactions. (Kabikinaw; Streptase).
sulconazole A synthetic antifungal agent similar in actions and uses to miconazole. Applied as a 1% cream twice daily. (Exelderin).
sulfadoxine A long-acting sulphonamide, with the general antibacterial action of the group. It has been used in the treatment of leprosy.
Dose: I-1.3f; weekly. In association with pyrimethainine, it is used in the treatment of malaria, but the use of such mixed products requires great care, as severe, sometimes fatal side-effects have occurred. It is no longer used for malaria prophylaxis. (Fansidar).
sulfametopyrazine A very long-acting sulphonamide used mainly in chronic bronchitis and urinary tract infections. Dose: 2 g once it week. Side-effects and toxic reactions, although mainly those of the sulphonamides generally, may be linked with the slow excretion of the drug. (Kelfizine).
streptokinase- streptodornase A mixture of enzymes obtained from cultures of haemolytic streptococci. It brings about the dissolution of blood clots and the liquefaction of purulent exudates, anti is used as a solution to clean foul wounds, pressure sores and ulcers. (Varidase).
streptomycin The first of the amino-glycoside antibiotics, but now used mainly as part of the multi-drug treatment of tuberculosis.
sulindaC A non-steroidal anti-inflammatory analgesic agent (NSAID) with actions, uses and side-effects similar to naproxen. It is of value in the pain and inflammation of rheumatoid disease and acute gout. Dose: 200-400 ing daily with food. It may cause gastrointestinal disturbance and occasional bleeding. (Clinoril). See
page 165 and Table 29.
sulphadiazine one of the more active and less toxic sulphonamides. It is used mainly in the treatment of severe conditions such as meningococcal meningitis.

Dose: (, 9 g daily by deep i.m. injection or i.v. infusion for 2 days, followed by 2 g or more orally daily. Dose in the prevention of rheumatic fever I g daily. Side-
effects are nausea, rash and blood dyscrasias.
sulphadimidine One of the least toxic of the sulphonamides, now used mainly in urinary infections.
Dose: 2 g initially, with maintenance of 1. - 4 g daily orally. Side-effects include nausea, drug fever, rash and leucopenia.
sulphamethoxazole A sulphonamide present with trimethaprim in co-trinioxazole.
sulphasalazine A sulphonamide derivative that is taken up selectively by the connective tissues of the intestines. It is used in the treatment and maintenance of remission in ulcerative colitis and Crohn’s disease.
Dose: 4-8g daily initially; maintenance, 1.5-2 g daily. 11 is also given as a 3 g enema and as 500 mg suppositories. Occasionally given in rheumatoid arthritis in doses of 03-3 g daily. Side-effects include nausea, rash, drug fever and blood dyscrasia. If blood dyscrasia is suspected, a blood count should be done and the drug withdrawn. (Salazopyrin). See niesalazine, olsalazine, page 172 and’I'able 32.
sulphathiazole One of the early sulphonamides, and survives in a few mixed products.
sulphinpyrazone. A uricosuric agent with the selective action of increasing the excretion of uric acid, hence used in the treatment of chronic gout and hyperuricaemia. Dose: 100-200 mginitially with food, increased according to the plasma uric acid levels up to 60(1-800 nag daily, with tower maintenance doses according to need and response. Side-effects are nausea, abdominal pain and rash. Care is necessary in peptic ulcer and renal impairment, and blood counts are necessary during, treatment. Salicylates antagonize the action of the drug. (Anturan). See
page 1.10 and Table 17.
sulphonamides A group of drugs that have an antibacterial action by preventing the uptake and use of folic acid. They are thus bacteriostatic and not bactericidal in action. The use of the sulphonamides ides has
declined, and they are now used mainly in urinary tract infections due to sulphonamide-sensitive bacteria. The side-effects of the sulphonamides include nausea, dyspepsia, diarrhoea and allergic reactions. Bone marrow depression may occur if treatment is prolonged. The uncommon Stevens-Johnson syndrome is a very serious reaction. See sulphadiazine ind co-trinioxazole.
sulphonylureas A group of orally active drugs represented by chlorpropamide that promote the release of insulin from the beta-cells of the pancreas. They are used in mild diabetes not controlled by diet, and in the late-onset diabetes of middle age, but they are not suitable for the treatment of juvenile diabetes. The presence of some still-functioning beta-cells is essential for sulphonylurea activity. Side-effects include weight gain, rash, fever and jaundice. During illness and pregnancy, insulin treatment should replace sulphonylurea therapy. See page 131 and Table 13.
sulphide An antipsychotic drug with a central action on dopaminereceptors. It is used in the treatment of acute and chronic schizophrenia, as in low doses it increases awareness in apathetic and withdrawn patients, and in larger doses controls the active forms of the illness.
Dose: 400-800 mg daily: in severe conditions up to 2.4 g daily. The side-effects are similar to those of chlorpromazine. (Dolmatil; Sulparex; Sulpitil). See
page 168 and Table 30.
sumatriptan A serotonin agonist used in
i lie treatment of acute migraine. (It is not suitable for prophylaxis.)
Dose: 50-100 mg orally as soon as possible after onset of an attack, but a second dose should not be given for the same attack, but may be repeated once if migraine symptoms recur. In severe migraine an(] cluster headache 6 mg by S.C. injection, but not more than 12 nig in 24 hours. (Pre-filled syringes and an auto-injector are available.) If should not be given until 24 hours after other antimigraine treatment, or any other drug that influences the re-uptake of serotonin. Side-effects include tingling and tightness in any part of the body, and an angina-like chest pain that may be severe. (I migran). See page 154 and Table 23.