Common symptoms include: 1  Pain in your neck. 2  Headaches. 3  Pain in your shoulder, arm, or hand.  Reduced range of motion in your 1  neck. Numbness, weakness, and slower reflexes in your arms, hands,legs, or feet.  Problems walking including a spastic 1  gait. Muscle weakness in your  legs.
Efavirenz can cause side effects such as mood or behavior changes. These symptoms may improve the longer you take the medication. Taking efavirenz at bedtime may also lessen these effects. Contact your doctor if you have more serious symptoms such as severe depression or thoughts of hurting yourself.isit your doctor regularly. This medication can cause you to have a false positive drug-screening test. If you provide a urine sample for drug-screening, tell the laboratory staff that you are taking efavirenz. Store at room temperature away from moisture and heat.
How to start taking the pill. When you start taking the pill for the first time, you should take the first pill on the first day of your period. This way, you will be protected immediately and you wonât need to use an additional contraceptive to prevent pregnancy. You then need to take one pill every day. If you are on a mini pill, each pack will contain 28 pills. If you are on a combined pill, each pack will most likely contain 21 pills and you need to take a seven day break after each pack. It is also possible to start using the pill at a different point during your cycle. However, if you do not start taking it on the first day of your period you will need to use additional contraception for seven days. When you restart taking the pill after a break, you need to start the same way.