Medicines & You

= Chemical Compound
= Indications
= Dosage
= Contraindication
= Special Precautions
= Adverse Reactions
= Drug-Drug Interaction

Antidotes & Detoxifying Agents

Dimercaprol.
Heavy metal intoxication.
Hepatic insufficiency unless due to arsenic poisoning; treatment of Fe, cadmium or selenium poising, alone in lead poisoning, G6PD deficiency.
Hypertension, impaired renal function, elderly, pregnancy or lactation.
(May be reduced by 4 hr interyal between doses, 30-60 mg, ephedrine orally ½ hr before inj). Local pain, hypertension w/ tachycardia; Gl disturbances, burning sensation of lips, mouth, throat, eyes; salivation, lacrimation; conjunctivitis; rhinorrhea; muscle spasm; abdominal pain, headache, tingling of extremities, feeling of chest or throat constriction, sweating. In childn, fever after 2nd or 3rd inj, until treatment ends.
Fe supplements must not be taken during therapy.

Desferrioxamine methanesulfonate.
Chronic Fe overload; eg transfusional haemosiderosis, esp in thalassaemia major; idiopathic haemochromatosis in patient in whom concomitant disorders preclude phlebotomy; porphyria cutanea tarda. Acute Fe poisoning. Chronic Al overload in renal patient on maintenance dialysis w/, for eg Al-related bone disease &/or encephalopathy. Test for Fe or Al overload.
Discontinue therapy if infected w/ Yersinia enterocolitica & Yersinia pseudotuberculosis. Perform ophth & audiological tests before & during treatment )if disturbances occur, discontinue therapy). Severe renal failure or anuria (in non-dialysed patient): Rate of IV infusion not > 15 mg/kg/hr. Pregnancy.
rarely, allergic skin reactions, anaphylactic reactions, local irritation at administration site, disturbances of vision & hearing, opacities of the lens, Gl disturbances, leg cramps, renal or hepatic impairment, thrombocytopenia, CV & neurological disturbances.

Leucovorin Ca.
Leucovorin rescue after high-dose methotrexate therapy, impaired methotrexate elimination or inadvertent over dosage.
Pernicious anaemia & other megaloblastic anaemia where vit B12 is deficient.
Parenteral administration is preferable if there is possibility of vomiting. Must be administered promptly as possible in accidental over-dosage of folic acid antagonists like MTX. Pregnancy & lactation. Elderly.
Allergic sensitization including anaphylactoid reactions & urticaria.

Naltrexone HCI.
Adjunct to the maintenance of the opioid-free state in detoxified formerly opioid-dependent individuals.
Insomnia, anxiety, nervousness, abdominal pain/cramps, nausea/vomiting, low energy, joint/muscle pain, headache, loss of appetite, diarrhea, constipation, increased thirst, increased energy, feeling down, irritability, dizziness, skin rash, delayed ejaculation, decreased potency & chills.
Patients taking Trexan may not benefit from opioid containing medicines.

Mesna.
Prevention of urotoxic effects of oxazaphosphorines.
Protective effect applies only to the urinary tract.
Gl effects, headache, malaise, skin rash. Allergic symptoms (rare). Vein irritation.