A weekly column looking at common treatments
Acyclovir - antiviral treatment for herpes
What is it? Acyclovir is an antiviral drug used to treat herpes infections such as cold sores, genital herpes, herpes eye infections and shingles. It is administered in topical creams, ointments, tablets and injections.
What is it good for? These drugs reduce the severity and duration of herpes infection. Antiviral drugs do not eradicate the virus which continues to live in the body causing flare-ups at a later time. Halting the infection prevents healthy cells from being infected and therefore improves symptoms rapidly.
How does it work? A virus requires a living cell's DNA in order to reproduce. The invaded cell eventually dies and the new viruses are released, spreading and infecting other cells. Acyclovir prevents the virus using the host cells, the virus dies and the spread of infection is halted.
Any contraindications? Acyclovir should be used with caution by those with impaired kidney function and is not recommended in oral or injectable form during pregnancy.
Possible side-effects? Topical preparations may dry the skin and sometimes cause itching, stinging or burning sensations where applied. Any drugs which affect the function of the kidneys increase the risk of side effects from oral acyclovir. Confusion and hallucinations occur rarely with the injectable form of the drug. Dr Muiris Houston
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Alternative remedy: Edible seaweed
What is it? Edible seaweeds such as kombu, nori and wakame have long been valued as both food and medicine, especially in China and Japan. Kelp (or bladderwrack) is used therapeutically in Western herbal medicine. The entire kelp plant is gathered from rocks along the seashore in early summer and dried in the sun.
What is it good for? Kombu, nori and wakame are all deemed valuable in the treatment of anaemia and for boosting the immune system. They are also valued in the treatment and prevention of osteoporosis. Kelp is used as a treatment for underactive thyroid and also is reputed to help relieve rheumatism and rheumatoid arthritis.
How does it work? Kombu is rich in vitamins A and C and calcium. Nori and wakame are rich in iron, calcium and protein. These nutritional components help boost the immune system. Kelp has anti-hypothyroid and anti-rheumatic actions.
Any contraindications? Kombu, nori and wakame are best bought dried and soaked before use, unless they are being added to soups and stews. Kombu contains a high amount of sodium and is unsuitable for those with high blood pressure or on a low-salt diet. Kelp should not be taken in conjunction with thyroid medication and natural substances should not be used instead of medication for a thyroid complaint without your doctor's advice.
Any side-effects? None known. Sylvia Thompson