Vitamin A deficiency can be prevented by including foods rich in vitamin A or beta-carotene as a regular component of the diet; liver, meat, eggs, milk, and dairy products are examples. Foods rich in beta-carotene include red peppers, carrots, pumpkins, as well as those just mentioned.eta-carotene is a form of pre-vitamin A, which is readily converted to vitamin A in the body. Night blindness is the first symptom of vitamin A deficiency. Prolonged and severe vitamin A deficiency can produce total and irreversible blindness.
If a person does develop sexual side effects, such as impotence or a decrease in libido, it is difficult to know whether these problems are caused by another condition or by Valtrex itself.f you are taking Valtrex and sexual side effects occur, your healthcare provider may adjust your dosage of Valtrex or prescribe another medication for your condition.
How Valtrex tablets work. Valtrex tablets belong to a group of medicines called antivirals. Valtrex tablets are used for the treatment of shingles (herpes zoster), ophthalmic zosters (shingles affecting the eye region) and cold sores (herpes labialis).ow Valtrex tablets work. Valtrex tablets belong to a group of medicines called antivirals. Valtrex tablets are used for the treatment of shingles (herpes zoster), ophthalmic zosters (shingles affecting the eye region) and cold sores (herpes labialis).