Sperm can live for only a few hours inside the vagina, and even less than that outside the human body, exposed to the open air. If the sperm survive to enter the less hostile environment of the female reproductive tract beyond the cervix, they can survive for up to five days.
The systemics that are most commonly used to treat psoriasis in the UK are Methotrexate, Ciclosporin and Acitretin. Click here for more information on Methotrexate, its dosing regime and side effects. Click here for more information on Ciclosporin, its dosing regime and side effects.
1 Lithium: Used to treat manic depression and other psychiatric disorders. Lithium aggravates psoriasis in about half of those with psoriasis who take it.  Antimalarials: Plaquenil, Quinacrine, chloroquine and hydroxychloroquine may cause a flare of psoriasis, usually two to three weeks after the drug is taken. Hydroxychloroquine is the least likely to cause side effects.